CN113847097A - Fire early warning method and system for underground mining and computer storage medium - Google Patents
Fire early warning method and system for underground mining and computer storage medium Download PDFInfo
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- 238000005065 mining Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000003860 storage Methods 0.000 title claims abstract description 13
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- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 91
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- 238000004880 explosion Methods 0.000 claims description 72
- 239000002817 coal dust Substances 0.000 claims description 68
- 239000007789 gas Substances 0.000 claims description 66
- 239000000463 material Substances 0.000 claims description 25
- 239000007787 solid Substances 0.000 claims description 18
- 239000003034 coal gas Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 25
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 14
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The application relates to a fire early warning method, a fire early warning system and a computer storage medium for underground mining, wherein the method comprises the following steps: acquiring temperature information of each underground area; acquiring the position of a downhole heat source; analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position; acquiring the oxygen content of the area where the heat source is located; and obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition. The mine fire disaster alarm device is used for overcoming the defect that the occurrence situation of a mine fire disaster cannot be timely perceived in the prior art, so that the probability of property loss and casualty during mineral exploitation is effectively reduced, and the safety during coal mining is improved. The fire early warning system for underground mining and the computer storage medium have the same effects.
Description
Technical Field
The invention relates to the technical field of mine safety management and control, in particular to a fire early warning method and system for underground mining and a computer storage medium.
Background
Coal will continue to become an important energy source for national economic development in China for a long time in the future, determined by the current national conditions and national resource proportion. The coal resources in China are quite rich, and according to related data, the total storage capacity of the coal resources discovered in China reaches 4 hundred million tons, and the coal resources are in the forefront of the world, but most of the coal explored in China is located in underground deep soil layers, and deep well operation is needed for coal mining.
However, with the increasingly enhanced social development and mineral resource development, the construction and mining depth of high-efficiency high-yield mines are continuously extended and are influenced by the heat dissipation of surrounding rocks and electromechanical equipment and the ground temperature gradient, and the heat hazard of underground heat sources becomes a problem that the safety production of mines is not negligible; in addition, a large amount of pit wood, electromechanical equipment, explosive, oil and other substances are required to be used in the mining process, and a large amount of coal dust and gas generated in the mining process belong to combustible substances, and are inflammable and explosive. Therefore, in the process of mining, fire control is particularly important, but the fire is not easy to find in the early stage of the mine fire, the fire development speed is high, the fire is not easy to control, the influence range is wide, and property loss and casualties are caused when the fire is found.
Therefore, how to detect the occurrence of mine fire in time so as to effectively reduce the property loss and the casualty occurrence probability during mining is a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The application provides a fire early warning method, a fire early warning system and a computer storage medium for underground mining, which are used for overcoming the defect that the occurrence situation of a mine fire cannot be timely perceived in the prior art, so that the probability of property loss and casualties during mining is effectively reduced, and the safety during mining is improved.
To achieve the above objects, in one aspect, the present application provides a fire early warning method for underground mining, including:
acquiring temperature information of each underground area;
acquiring the position of a downhole heat source;
analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position;
acquiring the oxygen content of the area where the heat source is located;
and obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition.
By adopting the technical scheme, the method is used for overcoming the defect that the occurrence situation of the mine fire can not be timely perceived in the prior art, thereby effectively reducing the probability of property loss and casualties during mineral exploitation and improving the safety during coal mining.
Optionally, the obtaining the position of the heat source downhole includes:
acquiring thermal images of various underground areas by non-contact detection of infrared energy;
acquiring visible light images of various underground areas;
and analyzing the heat source position underground according to the thermal image and the visible light image.
By adopting the technical scheme, the thermal imaging technology detects infrared energy through non-contact and converts the infrared energy into an electric signal, and then generates a thermal image on the display, the measured temperature field is not easily influenced, the thermal imaging technology is not damaged by thermal stress, and the thermal imaging device has the advantages of wide accurate measurement coverage, higher temperature measurement speed, high accuracy, high sensitivity, long application safety and service life and the like, and can accurately find the position of a heat source.
Optionally, the combustible information comprises solid combustible, coal dust and gas,
analyzing and obtaining the combustible material information of the region where the heat source position is located according to the heat source position information, wherein the combustible material information comprises
Analyzing and obtaining the solid combustible material of the region where the heat source position is located according to the heat source position;
acquiring a coal dust concentration value of an area where the heat source position is located according to the heat source position;
and acquiring a gas concentration value of an area where the heat source position is located according to the heat source position.
By adopting the technical scheme, a large amount of wood, electromechanical equipment, explosive, oil and other substances are required to be used in the mineral exploitation, a large amount of coal dust and gas generated in the coal exploitation process belong to combustible materials, and the combustible materials are inflammable and explosive, the combustible material information of the underground heat source position is detected, and the fire early warning capability aiming at different combustible materials is improved.
Optionally, the obtaining fire early warning information according to the oxygen content, the temperature information of the region where the heat source position is located, the combustible information and the corresponding preset combustion condition includes:
judging whether the oxygen content meets an oxygen combustion threshold value of a preset combustion condition;
if the oxygen content reaches the oxygen combustion threshold, judging whether the temperature information of the area where the heat source position is located reaches the ignition point alarm value of the solid combustible under the preset combustion condition;
and if the temperature information of the area where the heat source position is located reaches the ignition point alarm value, sending out fire early warning information.
By adopting the technical scheme, the fire early warning is carried out on the area where the underground heat source is located according to the preset combustion condition of the solid combustible, and the fire defense capability is improved.
Optionally, if the temperature information of the area where the heat source position is located reaches the ignition point alarm value, fire early warning information is sent out, and then the method further includes:
judging whether the coal dust concentration value, the temperature information of the area where the heat source position is located and the oxygen content reach the coal dust explosion alarm standard of a preset combustion condition or not;
and if the coal dust explosion alarm standard is met, sending coal dust explosion early warning information.
By adopting the technical scheme, after the fire early warning information is sent out to the solid combustible, the coal dust explosion early warning is carried out according to the coal dust hazard, the coal mining danger is reduced, and the sustainable development of a coal mine is ensured.
Optionally, the determining whether the coal dust concentration value, the temperature information of the area where the heat source position is located, and the oxygen content meet the coal dust explosion alarm standard of a preset combustion condition includes:
judging whether the oxygen content meets an oxygen combustion threshold of the coal dust explosion alarm standard;
if the oxygen content reaches the oxygen combustion threshold, judging whether the coal dust concentration value is smaller than the concentration lower limit value of the coal dust explosion alarm standard;
if the concentration value is greater than or equal to the lower concentration limit value, judging whether the coal dust concentration value is greater than the upper concentration limit value of the coal dust explosion alarm standard;
and if the concentration is less than or equal to the upper limit value of the concentration, judging whether the temperature information of the area where the heat source position is located reaches a high-temperature alarm value of the coal dust explosion alarm standard.
By adopting the technical scheme, coal dust explosion needs certain conditions, the coal dust explosion alarm standard is set, explosion occurrence is judged in advance in time, measures for preventing coal dust explosion are conveniently expanded in the subsequent process, the possibility of coal dust explosion occurrence is reduced, and the life and property safety of underground workers is further protected.
Optionally, if the temperature information of the area where the heat source position is located reaches the ignition point alarm value, fire early warning information is sent out, and then the method further includes:
judging whether the gas concentration value, the temperature information of the area where the heat source position is located and the oxygen content reach the gas explosion alarm standard of a preset combustion condition or not;
and if the gas explosion alarm standard is met, sending out gas explosion early warning information.
By adopting the technical scheme, after fire early warning information is sent out, gas explosion early warning is needed to be carried out aiming at gas hazards, the danger of coal mining is reduced, and the sustainable development of coal mines is guaranteed.
Optionally, the determining whether the gas concentration value, the temperature information of the area where the heat source position is located, and the oxygen content meet the gas explosion alarm standard of a preset combustion condition includes:
judging whether the oxygen content meets an oxygen combustion threshold of the gas explosion alarm standard;
if the oxygen content reaches the oxygen combustion threshold, judging whether the gas concentration value is smaller than the lower concentration limit value of the gas explosion alarm standard;
if the concentration value is greater than or equal to the lower concentration limit value, judging whether the concentration value of the gas is greater than the upper concentration limit value of the gas explosion alarm standard;
and if the temperature information is less than or equal to the concentration upper limit value, judging whether the temperature information of the area where the heat source position is located reaches a high-temperature alarm value of the gas explosion alarm standard.
By adopting the technical scheme, gas explosion needs certain conditions, the gas explosion alarm standard is set, explosion is judged in advance in time, measures for preventing gas explosion are conveniently expanded in the subsequent process, the possibility of gas explosion is reduced, and the life and property safety of underground workers is further protected.
To achieve the above object, in another aspect, the present application further provides a fire early warning system for underground mining, including:
the temperature acquisition module is used for acquiring temperature information of each underground area;
the heat source position acquisition module is used for acquiring the position of the underground heat source;
the combustible analysis module is used for analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position;
the oxygen content acquisition module is used for acquiring the oxygen content of the area where the heat source position is located;
and the fire early warning module is used for obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition.
By adopting the technical scheme, the method is used for overcoming the defect that the occurrence situation of the mine fire can not be timely perceived in the prior art, thereby effectively reducing the probability of property loss and casualties during mineral exploitation and improving the safety during coal mining.
To achieve the above object, in yet another aspect, the present application further provides a computer storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the fire early warning method for underground mining as described in any one of the above.
By adopting the technical scheme, the method is used for overcoming the defect that the occurrence situation of the mine fire can not be timely perceived in the prior art, thereby effectively reducing the probability of property loss and casualties during mineral exploitation and improving the safety during coal mining.
The fire early warning method, the fire early warning system and the computer storage medium for underground mining have the following comprehensive technical effects:
aiming at the related technology, the temperature information of each underground area is obtained; acquiring the position of a downhole heat source; analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position; acquiring the oxygen content of the area where the heat source is located; and obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition. The mine fire disaster alarm device is used for overcoming the defect that the occurrence situation of a mine fire disaster cannot be timely perceived in the prior art, so that the probability of property loss and casualty during mineral exploitation is effectively reduced, and the safety during coal mining is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a fire early warning method for underground mining according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram of one embodiment provided by an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a second embodiment according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a third embodiment according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a fourth implementation manner provided in the embodiment of the present invention;
FIG. 6 is a schematic flow chart of a fifth embodiment according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a fire warning system for underground mining according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The embodiments of the present application are written in a progressive manner.
The invention is mainly applied to the underground mining process of mines, and can also be applied to other scenes when in specific application, and no specific description is made. In the examples of the present invention, the underground mining of a mine is taken as an example for explanation.
As shown in fig. 1, an embodiment of the present invention provides a fire early warning method for underground mining, including:
s101, acquiring temperature information of each underground area;
in the embodiment, the thermal infrared imagers are arranged in various underground areas to acquire relevant temperature information, the thermal infrared imagers receive infrared radiation energy distribution patterns of a detected target by using infrared detectors and optical imaging objectives, invisible infrared energy emitted by an object is converted into visible thermal images, and different colors displayed on display screens of the thermal images represent different temperatures of the detected object; the thermal imaging technology is a detection technology that detects infrared energy (heat) by non-contact, converts the infrared energy into an electric signal, generates a thermal image and a temperature value on a display, and calculates the temperature value. Compared with other temperature measurement components, the thermal infrared imager is not easy to influence a measured temperature field, is not damaged by thermal stress, and has the advantages of wide accurate measurement coverage, higher temperature measurement speed, high accuracy, high sensitivity, long application safety and service life and the like.
S102, obtaining the position of a downhole heat source;
in the embodiment, the thermal infrared imager acquires thermal images of various underground areas, fuses the visible light images, and analyzes and acquires the position of the heat source.
S103, analyzing and obtaining combustible information of an area where the heat source position is located according to the heat source position;
in the embodiment, as a large amount of materials such as wood, electromechanical equipment, explosives, oil and the like are also needed in the mineral exploitation, and a large amount of coal dust and gas generated in the coal exploitation belong to combustible materials and are combustible and explosive, the combustible material information of the region where the heat source is located can be analyzed according to the position where the heat source is generated.
S104, obtaining the oxygen content of the area where the heat source is located;
in the embodiment, oxygen detectors are arranged in various underground areas, and the oxygen content of the area where the heat source is located is obtained according to the position of the heat source.
And S105, obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition.
In the present embodiment, combustion refers to an exothermic reaction that occurs when a combustible material reacts with an oxidizing agent, and is generally accompanied by flame, light emission, and smoke generation, and it is necessary to provide three elements of a combustible material, oxygen, and an ignition source at the same time for combustion of the material. Therefore, according to the temperature information, the oxygen content, the combustible material information and the corresponding preset combustion conditions of the area where the heat source position is located, the fire occurrence condition is judged in advance in time, fire early warning information is sent out, and the safety of underground mining work is improved.
In the embodiment of the invention, the temperature information of each underground area is obtained; acquiring the position of a downhole heat source; analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position; acquiring the oxygen content of the area where the heat source is located; and obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition. The mine fire disaster alarm device is used for overcoming the defect that the occurrence situation of a mine fire disaster cannot be timely perceived in the prior art, so that the probability of property loss and casualty during mineral exploitation is effectively reduced, and the safety during coal mining is improved.
As shown in fig. 2, in the above embodiment, the obtaining of the position of the downhole heat source in step S102 is described in detail, and includes:
s201, acquiring thermal images of various underground areas by non-contact detection of infrared energy;
in the embodiment, the thermal imaging technology detects infrared energy through non-contact and converts the infrared energy into an electric signal, so that a thermal image is generated on a display, and the thermal image of each underground area is acquired through a thermal infrared imager.
S202, acquiring visible light images of various underground areas;
in this embodiment, the visible light image is obtained through the camera of each regional installation in the pit.
And S203, analyzing and obtaining the position of the downhole heat source according to the thermal image and the visible light image.
In this embodiment, the thermal imaging probe comprises a housing, a PCB, a thermal imaging module, a network module, a control module, and a data processing module; the thermal imaging module, the network module, the data processing module and the control module are arranged in the instrument shell, and the thermal imaging module and the data processing module are connected with the control module; the data processing module can form a target object outline through algorithm processing and superpose the target object outline on a heat map, and the data is transmitted to an upper computer through the network module so as to analyze a target position or an object generated by a heat source; the data processing module and the control module comprise a color mode switching unit for controlling and switching the heat map display mode of the thermal imaging module, and the heat map display mode of the thermal imaging module comprises one or more of rainbow, iron red, white heat and black heat. The data processing module and the control module comprise a temperature mode switching unit for controlling and switching the temperature measuring function of the thermal imaging probe, the temperature measuring function can mark the temperature of the region and the high and low temperature points, and a plurality of regions or temperature points are displayed according to different temperatures, so that the purpose of accurately searching the source for temperature difference is achieved.
In the above illustrated embodiment, the combustible information includes solid combustible, coal dust and gas, and the step S103 of the embodiment in fig. 1 is described in detail by analyzing the combustible information of the region where the heat source is located according to the heat source location information, as shown in fig. 3, and includes:
s301, analyzing to obtain solid combustible materials in the region where the heat source position is located according to the heat source position;
in this embodiment, a large number of materials such as wood, electromechanical devices, explosives, and oil are used in mineral exploitation, and therefore, according to the position of the heat source, which solid combustible materials exist in the area where the position of the heat source is located is analyzed, and the solid combustible materials include the wood, the electromechanical devices, the explosives, and the oil, of course, the solid combustible materials are not limited to the above four types, and may include other solid combustible materials, and may be set according to actual conditions.
S302, acquiring a coal dust concentration value of an area where a heat source position is located according to the heat source position;
in the embodiment, coal dust is generated in mine production, along with the increasing increase of mine mining strength and the mechanized popularization, the harm of the coal dust is increased, the coal dust is harmful to the health of operators, and when the coal dust reaches a certain concentration, severe explosion can occur when the coal dust meets open fire, so that the safety production of a coal mine is seriously threatened, and the sustainable development of the coal mine is restricted. Therefore, it is also necessary to provide a coal dust concentration detector in each underground area to obtain the coal dust concentration of the area where the heat source is located, and if there is no coal dust, the coal dust concentration value obtained by the coal dust concentration detector is zero.
S303, acquiring a gas concentration value of the area where the heat source position is located according to the heat source position.
In this embodiment, besides coal dust, gas is generated in mine production, which means that the mine mainly contains harmful gas mainly comprising methane, mainly comprising methane CH4Heavy hydrocarbon CnHmHydrogen H2Carbon dioxide CO2Carbon monoxide CO, nitrogen dioxide NO, sulfur dioxide SO2Hydrogen sulfide H2S and the like. Mine gas has great harmfulness, and mine gas accidents are one of five natural disasters of coal mines and are key treatment objects in the production process of the coal mines. Gas explosion is a natural disaster with serious consequences specific to coal mines, and can cause great economic loss and casualties. Therefore, gas concentration detectors are arranged in various underground areas to obtain positions of heat sourcesAnd if no gas exists in the gas concentration value of the region, the gas concentration value obtained by the gas concentration detector is zero. Common gas concentration detectors include optical gas detectors, thermal conductivity type methane sensors, carrier thermal catalysis methane detectors, methane remote measuring alarm power-off instruments, gas chromatographs and the like.
As shown in fig. 4, in the above embodiment, the obtaining of the fire warning information according to the oxygen content, the temperature information of the area where the heat source is located, the combustible information, and the corresponding preset combustion condition in step S105 includes:
s401, judging whether the oxygen content meets an oxygen combustion threshold value of a preset combustion condition;
in this embodiment, the oxygen combustion concentrations corresponding to different combustibles are different, and therefore, for different combustible information, an oxygen combustion threshold of a combustion condition is preset, for example, when the oxygen content reaches above 14% -16%, the pit wood combustion condition can be met, and therefore, in order to timely warn the fire occurrence situation, whether the oxygen content meets the oxygen combustion threshold of the preset combustion condition is determined, and of course, only the pit wood is taken as an example, and the oxygen combustion thresholds of the electromechanical devices, the explosives, the oil materials and other substances are also taken as an example, so as to perform safety warning.
S402, if the oxygen content reaches the oxygen combustion threshold, judging whether the temperature information of the area where the heat source position is located reaches the ignition point alarm value of the solid combustible under the preset combustion condition;
in this embodiment, because the ventilation environment needs to be maintained in mine mining, the oxygen content in the atmosphere is generally about 21%, and most of the time, the oxygen combustion threshold value can be met, so according to the three combustion elements, the temperature information of the area where the heat source is located also needs to reach the fire point alarm value of the solid combustible under the preset combustion condition, the fire point of the wood is 200 ℃ to 290 ℃, and the fire point alarm value is lower than the fire point of the solid combustible, so that the fire early warning condition can be found in time, and the safety is guaranteed. Of course, the corresponding ignition points are different according to the difference of the solid combustible materials, the set ignition point alarm values are different, and the setting is carried out according to the actual conditions.
And S403, if the temperature information of the area where the heat source position is located reaches the ignition point alarm value, sending out fire early warning information.
In the embodiment, when the combustible, the oxygen and the temperature all meet the preset combustion condition, the fire occurrence condition is judged in advance in time, fire early warning information is sent out, and the safety of underground mining work is improved.
As shown in fig. 5, in the embodiment shown in fig. 4, if the temperature information of the area where the heat source position is located reaches the ignition point alarm value in step S403, the method further includes:
s501, judging whether the coal dust concentration value, the temperature information of the area where the heat source position is located and the oxygen content reach the coal dust explosion alarm standard of a preset combustion condition;
in this embodiment, after the fire early warning information is sent out, it is also pre-warned whether the coal dust in the area where the heat source is located will cause explosion, and three conditions of the coal dust explosion are as follows: 1) the coal dust itself must be explosive, and the concentration of floating dust is 30-45g/m3 at the lower limit and 1500-2000g/m3 at the upper limit. 2) A heat source for igniting coal dust is 650-900 ℃. 3) The oxygen content in the air is more than 18 percent.
The specific judgment process comprises the following steps: judging whether the oxygen content meets the oxygen combustion threshold of the coal dust explosion alarm standard; if the oxygen content reaches the oxygen combustion threshold, judging whether the coal dust concentration value is smaller than the concentration lower limit value of the coal dust explosion alarm standard; if the concentration value is greater than or equal to the lower concentration limit value, judging whether the coal dust concentration value is greater than the upper concentration limit value of the coal dust explosion alarm standard; and if the temperature information is less than or equal to the concentration upper limit value, judging whether the temperature information of the area where the heat source position is located reaches a high-temperature alarm value of the coal dust explosion alarm standard.
And S502, if the coal dust explosion alarm standard is met, sending coal dust explosion early warning information.
In the embodiment, if the coal dust in the area where the heat source position is located reaches the coal dust explosion alarm standard, coal dust explosion early warning information is sent out, and the underground coal dust explosion defense capability in the mineral exploitation process is improved.
As shown in fig. 6, in the embodiment shown in fig. 4, in step S403, if the temperature information of the area where the heat source position is located reaches the ignition point alarm value, the method sends out the fire warning information, and then further includes:
s601, judging whether the concentration value of the gas, the temperature information of the area where the heat source is located and the oxygen content reach the gas explosion alarm standard of a preset combustion condition or not;
in this embodiment, after the fire early warning information is sent, whether the gas in the area where the heat source is located will cause explosion is also early warned, where the lower limit of the gas explosion is 5% -6%, and the upper limit is 14% -16%. When the concentration of the gas is 9-9.5%, the explosion is most violent. The concentration of oxygen in the gas and air mixed gas must be more than 12 percent, otherwise, the explosion reaction can not be continued, and the concentration of oxygen in the mine air is generally 20 to 21 percent, and the oxygen concentration standard can be met under the general condition. The minimum temperature required to ignite the gas is called the ignition temperature, also called the priming temperature, and the ignition temperature in air is typically 650-750 ℃ under normal conditions.
The specific judgment process comprises the following steps: judging whether the oxygen content meets an oxygen combustion threshold of a gas explosion alarm standard; if the oxygen content reaches the oxygen combustion threshold, judging whether the gas concentration value is smaller than the lower concentration limit value of the gas explosion alarm standard; if the concentration value is greater than or equal to the lower concentration limit value, judging whether the concentration value of the gas is greater than the upper concentration limit value of the gas explosion alarm standard; if the temperature information is less than or equal to the concentration upper limit value, judging whether the temperature information of the area where the heat source position is located reaches a high-temperature alarm value of a gas explosion alarm standard.
And S602, if the gas explosion alarm standard is met, sending out gas explosion early warning information.
In the embodiment, if the gas in the area where the heat source position is located reaches the gas explosion alarm standard, gas explosion early warning information is sent out, and the underground gas explosion defense capability in the mineral exploitation process is improved.
The fire early warning method for underground mining is explained in detail in the above embodiments, and a fire early warning system for underground mining, which is applied to the fire early warning method for underground mining, is explained below.
As shown in fig. 7, an embodiment of the present invention further provides a fire early warning system for underground mining, including:
the temperature acquisition module 701 is used for acquiring temperature information of each underground area;
a heat source position obtaining module 702, configured to obtain a position of a heat source downhole;
the combustible analysis module 703 is used for analyzing and obtaining combustible information of the area where the heat source position is located according to the heat source position;
an oxygen content obtaining module 704, configured to obtain an oxygen content of an area where the heat source is located;
and a fire early warning module 705, configured to obtain fire early warning information according to the oxygen content, the temperature information of the area where the heat source is located, the combustible information, and a corresponding preset combustion condition.
In the embodiment of the invention, the temperature information of each underground area is acquired through a temperature acquisition module 701; the combustible analysis module 703 acquires the position of the underground heat source according to the heat source position acquisition module 702, and analyzes to obtain the combustible information of the region where the heat source position is located; the oxygen content obtaining module 704 obtains the oxygen content of the area where the heat source is located; the fire early warning module 705 obtains fire early warning information according to the oxygen content of the oxygen content obtaining module 704, the temperature information of the region where the heat source position of the temperature obtaining module 701 is located, the combustible information of the combustible analysis module 703 and the corresponding preset combustion condition. The scheme is used for overcoming the defect that the occurrence condition of the mine fire can not be timely perceived in the prior art, thereby effectively reducing the probability of property loss and casualties during mineral exploitation and improving the safety during coal mining.
An embodiment of the present invention further provides a computer storage medium, where a computer program is stored on the computer storage medium, and when the computer program is executed by a processor, the steps of the fire early warning method for underground mining as described in any one of the above are implemented. The mine fire disaster alarm device is used for overcoming the defect that the occurrence situation of a mine fire disaster cannot be timely perceived in the prior art, so that the probability of property loss and casualty during mineral exploitation is effectively reduced, and the safety during coal mining is improved.
For a description of a fire early warning system for underground mining and related parts in a computer storage medium provided in an embodiment of the present invention, reference is made to detailed descriptions of corresponding parts in a fire early warning method for underground mining provided in an embodiment of the present invention, and details are not repeated here. In addition, parts of the above technical solutions provided in the embodiments of the present invention that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail, so as to avoid redundant description.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A fire early warning method for underground mining, comprising:
acquiring temperature information of each underground area;
acquiring the position of a downhole heat source;
analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position;
acquiring the oxygen content of the area where the heat source is located;
and obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition.
2. A fire alerting method for downhole mining as claimed in claim 1, wherein the obtaining a location of a heat source downhole comprises:
acquiring thermal images of various underground areas by non-contact detection of infrared energy;
acquiring visible light images of various underground areas;
and analyzing the heat source position underground according to the thermal image and the visible light image.
3. The fire early warning method for underground mining according to claim 1, wherein the combustibles information includes solid combustibles, coal dust and gas,
analyzing and obtaining the combustible material information of the region where the heat source position is located according to the heat source position information, wherein the combustible material information comprises
Analyzing and obtaining the solid combustible material of the region where the heat source position is located according to the heat source position;
acquiring a coal dust concentration value of an area where the heat source position is located according to the heat source position;
and acquiring a gas concentration value of an area where the heat source position is located according to the heat source position.
4. A fire early warning method for underground mining according to claim 3, wherein the obtaining of fire early warning information according to the oxygen content, the temperature information of the area where the heat source is located, the combustible information and the corresponding preset combustion condition comprises:
judging whether the oxygen content meets an oxygen combustion threshold value of a preset combustion condition;
if the oxygen content reaches the oxygen combustion threshold, judging whether the temperature information of the area where the heat source position is located reaches the ignition point alarm value of the solid combustible under the preset combustion condition;
and if the temperature information of the area where the heat source position is located reaches the ignition point alarm value, sending out fire early warning information.
5. The fire early warning method for underground mining according to claim 4, wherein if the temperature information of the area where the heat source position is located reaches the fire point alarm value, fire early warning information is sent out, and then the method further comprises the following steps:
judging whether the coal dust concentration value, the temperature information of the area where the heat source position is located and the oxygen content reach the coal dust explosion alarm standard of a preset combustion condition or not;
and if the coal dust explosion alarm standard is met, sending coal dust explosion early warning information.
6. The fire early warning method for underground mining according to claim 5, wherein the determining whether the coal dust concentration value, the temperature information of the area where the heat source position is located and the oxygen content meet the coal dust explosion alarm standard of a preset combustion condition comprises:
judging whether the oxygen content meets an oxygen combustion threshold of the coal dust explosion alarm standard;
if the oxygen content reaches the oxygen combustion threshold, judging whether the coal dust concentration value is smaller than the concentration lower limit value of the coal dust explosion alarm standard;
if the concentration value is greater than or equal to the lower concentration limit value, judging whether the coal dust concentration value is greater than the upper concentration limit value of the coal dust explosion alarm standard;
and if the concentration is less than or equal to the upper limit value of the concentration, judging whether the temperature information of the area where the heat source position is located reaches a high-temperature alarm value of the coal dust explosion alarm standard.
7. The fire early warning method for underground mining according to claim 4, wherein if the temperature information of the area where the heat source position is located reaches the fire point alarm value, fire early warning information is sent out, and then the method further comprises the following steps:
judging whether the gas concentration value, the temperature information of the area where the heat source position is located and the oxygen content reach the gas explosion alarm standard of a preset combustion condition or not;
and if the gas explosion alarm standard is met, sending out gas explosion early warning information.
8. The fire early warning method for underground mining according to claim 7, wherein the judging whether the gas concentration value, the temperature information of the area where the heat source position is located and the oxygen content meet gas explosion alarm standards of preset combustion conditions comprises:
judging whether the oxygen content meets an oxygen combustion threshold of the gas explosion alarm standard;
if the oxygen content reaches the oxygen combustion threshold, judging whether the gas concentration value is smaller than the lower concentration limit value of the gas explosion alarm standard;
if the concentration value is greater than or equal to the lower concentration limit value, judging whether the concentration value of the gas is greater than the upper concentration limit value of the gas explosion alarm standard;
and if the temperature information is less than or equal to the concentration upper limit value, judging whether the temperature information of the area where the heat source position is located reaches a high-temperature alarm value of the gas explosion alarm standard.
9. A fire early warning system for underground mining, comprising:
the temperature acquisition module is used for acquiring temperature information of each underground area;
the heat source position acquisition module is used for acquiring the position of the underground heat source;
the combustible analysis module is used for analyzing and obtaining combustible information of the region where the heat source position is located according to the heat source position;
the oxygen content acquisition module is used for acquiring the oxygen content of the area where the heat source position is located;
and the fire early warning module is used for obtaining fire early warning information according to the oxygen content, the temperature information of the area where the heat source position is located, the combustible information and the corresponding preset combustion condition.
10. A computer storage medium, having a computer program stored thereon, which, when being executed by a processor, carries out the steps of the method of fire early warning for downhole exploitation as claimed in any one of claims 1 to 8.
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