CN104792961A - Large-size coal and mashgas outburst simulation test device - Google Patents
Large-size coal and mashgas outburst simulation test device Download PDFInfo
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- CN104792961A CN104792961A CN201510118037.9A CN201510118037A CN104792961A CN 104792961 A CN104792961 A CN 104792961A CN 201510118037 A CN201510118037 A CN 201510118037A CN 104792961 A CN104792961 A CN 104792961A
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a large-size coal and mashgas outburst simulation test device; the size of an inner cavity of the device is 150 cm*60 cm*100 cm, and with installation of various sensors on a cavity body, various physical parameters in an outburst process are acquired; a roof rock stratum and a bottom rock stratum of a coal seam are simulated through the similar material ratio; a series of spring groups with different sizes are developed to form a working face front roof stress distribution simulation device; a bursting disc device is mounted at an outburst port, and induction of coal and mashgas outburst is achieved; three glass view windows are mounted at a rear side plate of the outburst cavity body; a gas injection system is connected with three gas injection pipelines which are evenly arranged in the coal seam. The device can really simulate the working face front roof stress distribution law, and really shows the stress variation law and deformation of the roof rock stratum in the outburst process and before and after outburst; reasonable design of the gas injection pipelines can ensure uniform adsorption of gas in coal bodies, a way adopting a bursting disc to induce coal and mashgas outburst is real and reliable, and the large-size coal and mashgas outburst simulation test device is highly suitable for popularization and use in coal and mashgas outburst simulation tests.
Description
Technical field
The present invention relates to a kind of large scale coal and gas prominent analogue experiment installation, belong to coal and gas prominent experiment field.
Background technology
As coal producer maximum in the world, China is also faced with the severeest Safety of Coal Mine Production situation, in the disaster that China's coal-mine is numerous simultaneously, Gas Disaster is particularly serious, in Gas Disaster, coal and gas prominent accident threatens the severeest, and the disposable injures and deaths caused are many.2000 according to statistics ~ in May, 2012, there is coal and gas prominent fatal accident 417 in China, causes 2743 people dead, and the accident that on average often rises causes 6.57 people dead.Wherein: the once casualty accident 93 of dead 1 ~ 2 people, dead 134 people; Account for 22.30% of total number respectively, account for 4.88% of death toll; The once larger casualty accident 259 of dead 3 ~ 9 people, dead 1262 people; Account for 62.11% of total number respectively, account for 46.0% of death toll; The once major casualties 55 of dead 10 ~ 29 people, dead 801 people; Account for 13.18% of total number respectively, account for 29.20% of death toll.
Enter the deep mining stage along with the existing most mine of China is opened in colliery, in New Built Mine, major part also belongs to Deep Mine.Along with the increase of the pit mining degree of depth, mine terrestrial stress and gas pressure increase, gas bearing capacity increases, and cause coal and gas prominent problem day by day serious and complicated, some mines without coal and gas prominent danger upgrade to projecting mine.Therefore, research coal and gas prominent genesis mechanism, finds out effective means and the technology of containment disaster, has great importance for the safety case and reduction fatality rate per million tons improving coal in China manufacturing enterprise.
Up to now, the understanding for coal and gas prominent mechanism also rests on the hypothesis sexual stage.For this reason, Chinese scholars has successively carried out a large amount of coal and gas prominent simulated experiments.USSR (Union of Soviet Socialist Republics) takes the lead in having carried out one dimension in the fifties in last century and gives prominence to simulated experiment, and experiment shows that only coal is just likely broken and dishes out under very large methane pressure gradient.The beginning of the sixties in last century, the flat increasing of Ben Xuezheshi use CO
2crystal ice, rosin, cement, coal grain analogue formation, utilize shock tube to carry out the experiment of simulation impelling coal, and simulate " driving " operation, but model be larger with the absorption property difference of coal.Deng Quan envelope takes the outstanding coal of projecting mine as coal sample, presses down and forms type simulated IV not adding any adjuvant condition, V class coal open crossdrift coal and gas prominent.Jiang Chenglin is coal and gas prominent process during stone door punching coal under ideal conditions with one dimension experimental simulation.Meng Xiangyue etc. utilize the coal and gas prominent two-dimensional analog experimental provision of designed, designed to carry out serial experiment, propose the failure mode of destruction existence " cracking " and " giving prominence to " two quasi-representative of coal sample.Cai Chenggong etc. devise three-dimensional coal and gas prominent analogue experiment installation by similarity theory, simulate the coal and gas prominent process under different shaped coal intensity, different three-dimensional stress, different gas pressure condition.Guo Li surely waits and then utilizes outstanding analogue means to demonstrate the variation tendency of temperature in coal and gas prominent process at laboratory experiment.Yin Guangzhi have developed a set of three-dimensional coal and gas prominent analogue means, can simulate different coal inclination angle, the outstanding experiment in different outstanding aperture, but this experimental provision can not simulate roof situation.
Sum up current coal and gas prominent analogue experiment installation, ubiquity size is little, outstanding small scale, fail the shortcomings such as simulation roof, these current analogue experiment installations can not the outstanding situation at real simulation scene, constrains the research to outstanding mechanism.
Summary of the invention
Coal and gas prominent simulated experiment is Study on Coal and gas outburst mechanism and the effective means causing calamity effect.In view of the actual conditions in above-mentioned existing experiment field, the present invention aim to provide a kind of large-sized, highly versatile, can the coal and gas prominent simulated experiment of revision test.
The present invention is achieved through the following technical solutions:
A kind of coal and gas prominent analogue experiment installation of the present invention, by outstanding inside cavity, every physical parameter that various kinds of sensors can survey outstanding process and outstanding front and back is installed, coal seam and Seam Roof And Floor formation model can be laid in outstanding cavity by stress loading system and model forming device, realize outstanding process and give prominence to the front and back STRESS VARIATION of Roof Rock Strata of Coal Seam and the research of distortion, by stress loading system and workplace front roof Stress regularity of distribution analogue means, realize simulating the actual physical of the workplace front roof Stress regularity of distribution, aspis installs rupture disk and rupture disk clamping device, this is fitted through flange and completes, between rupture disk clamping flange and aspis flange, sealing gasket is installed, it is firmly seal that rupture disk and rupture disk clamp flange, gas injection system and pumped vacuum systems connect level by pipeline and outstanding cavity.
Accompanying drawing explanation
Fig. 1 is outstanding analogue experiment installation front pictorial diagram;
Fig. 2 is outstanding analogue experiment installation glass vision panel pictorial diagram;
Fig. 3 is outstanding analogue experiment installation aspis pictorial diagram;
Fig. 4 is outstanding analogue experiment installation front elevation;
Fig. 5 is outstanding analogue experiment installation side view;
Fig. 6 is outstanding analogue experiment installation vertical view;
Drawing reference numeral illustrates: vacuumize interface 1, gas injection port 2, patching panel 3, pressing plate 4, hydraulic piston 5, piston base 6, upper cover plate 7, upper cover plate O-ring seal 8, spring 9, spring guiding mechanism 10, platen 11, front shroud O-ring seal 12, form fixed mechanism 13, glass vision panel 14, aspis inner flange 15, aspis outside flange 16, rupture disk accommodates mechanism 17, rupture disk 18, differential pressure pick-up 19, base plate 20, front fagging 21, internal layer front shroud 22, outer front shroud 23, left plate 24, back side panel 25, right plate 26.
Embodiment
Central idea of the present invention is by developing a large-sized coal and gas prominent analogue experiment installation, coal seam and adjoining rock model can be laid in the apparatus, in face of the hydraulic loading system level work carried by device, square roof Stress distribution simulation device carrys out the real simulation of roof Stress distribution in implementation model, by the induction that the moment explosion of rupture disk emergent pressure realizes coal and gas prominent, realize even gas injection and coal body to the uniform adsorption of gas by laying three gas injection pipelines in coal seam.
Large-sized coal and gas prominent analogue experiment installation of the present invention, comprising:
(1) first connect various kinds of sensors and gather main frame and computing machine, and checking that whether signal is unobstructed, whether data are correct, if data are incorrect, carry out adjustment to sensor;
(2) install the nexine minor flaps of front shroud bottom, the bolt reinforcing with augmenting wrench screwed on, guarantees that bolt is firm, with solid flange, aspis is sealed simultaneously;
(3) model is laid according to the thickness of 10cm one deck.The experimentally compressive strength of adjoining rock that records of room, according to the principle of similar material mixture, weighing material, to weigh sand, lime, gypsum and water mix, use spade uniform stirring simultaneously, after mixing by mixture to outstanding inside cavity, simultaneously ensure thickness probably even.Pressure rack be placed on composite material, start hydraulic loading system, base area stress intensity suitably adjusts on-load pressure, after reaching on-load pressure, and release after maintenance pressure 30min.Repeat above work to having laid the thick floor strata of 20cm;
(4) install front shroud second piece of nexine minor flaps, the bolt reinforcing with augmenting wrench screwed on, guarantees that bolt is firm;
(5) coal sample makes and lays.Coal sample is shattered to required particle size, mix a certain amount of coal tar and stir, be loaded into rapidly outstanding cavity and with fritter iron plate, coal sample arranged probably even to thickness, pressure rack is placed on composite material, start hydraulic loading system, base area stress intensity suitably adjusts on-load pressure, after reaching on-load pressure, and release after maintenance pressure 30min.After the laying completing ground floor coal, above coal seam, alongst lay pressure cell, then load second layer coal sample and complete the shaping of second layer coal sample;
(6) step (3) is repeated until complete the laying of roof strata;
(7) the outer large cover of front shroud is installed.Clear up the seal groove of front panel until seal groove is without any impurity and foreign matter with pressure fan and fur towel, O-ring seal is put into seal groove, complete the installation of outer large cover with driving and stretcher and fix;
(8) pull down the solid flange of aspis, install rupture disk and rupture disk clamping flange, installation process notes the installation of sealing gasket;
(9) hunt leak.Inject the gas of 0.5MPa with air compressor, check the sealing of each junction with suds, if suds display sealing is good, drain air in cavity, open pumped vacuum systems, when vacuum meter display-0.1MPa, close down pumped vacuum systems, and place 12 hours, if vacuum meter pointer does not return, show that sealing is good, if pointer returns, show that somewhere exists gas leakage situation, after injecting 1.0MPa pressed gas, continuation suds are hunted leak, until vacuum meter pointer no longer returns;
(10) open the acquisition software of various kinds of sensors, start the data gathering various kinds of sensors;
(11) gas injection.In cavity, CO is injected by gas injection port
2, until gas reaches adsorption equilibrium state, adsorption equilibrium pressure P controls the emergent pressure P for rupture disk
critical-0.1MPa;
(12) gas injection is continued until the emergent pressure that in cavity, gaseous tension reaches rupture disk causes rupture disk break instantaneously thus induce coal and gas prominent.
Claims (11)
1. a large scale coal and gas prominent analogue experiment installation, it is characterized in that, comprise coal and gas prominent cavity, physical parameter acquisition system, stress loading system, workplace front roof Stress regularity of distribution analogue means, model pressing shaping device, coal and gas prominent apparatus for deivation, visual observation device, gas injection system and pumped vacuum systems, described physical parameter acquisition system is connected with computing machine by various kinds of sensors and signal cable, stress loading system acts on model top board by workplace front roof Stress regularity of distribution analogue means, coal and gas prominent apparatus for deivation is connected with outstanding cavity by aspis, gas injection system and pumped vacuum systems connect level by pipeline and outstanding cavity.
2. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, is characterized in that, the inner cavity size of its outstanding cavity is 150cm*60cm*100cm, and laying model needs the general assembly (TW) of coal, sand, gypsum and gypsum to be about 1 ton.
3. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, it is characterized in that, outstanding cavity is installed temperature, gaseous tension, the various kinds of sensors such as pressure cell, electromagnetic radiation and acoustic emission, by signal cable and gather main frame and equal computing machine and be connected, parameter in all kinds of room can be surveyed in outstanding process.
4. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, it is characterized in that, pressue device is made up of hydraulic power unit and three groups of hydraulic pistons, hydraulic piston by floor installation at outstanding cavity top, piston moves downward in outstanding inside cavity, and hydraulic power unit connects level by hydraulic line and hydraulic piston.
5. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, it is characterized in that, the adjoining rock in coal seam is simulated by the analog material of similar material mixture acquisition some strength, for Study on Coal and Gas Outburst and outstanding before and after, the change of roof stress and roof deformation.
6. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, it is characterized in that, the front shroud of device is made up of two-layer, outer cover plate is used for sealing, nexine cover plate is made up of five pieces of minor flaps, and the height of every layer of minor flaps is 20cm, for the extrusion forming of model.
7. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, it is characterized in that, workplace front roof Stress regularity of distribution analogue means arranges totally 90 springs and spring guide piece by 6 row * 15 and forms, the spring sizes of the identical different lines of each row spring and specification difference.
8. a kind of large scale coal and gas prominent analogue experiment installation according to claim 5,6, it is characterized in that, the adjoining rock in coal seam is simulated by the analog material of similar material mixture acquisition some strength, after proportioning goes out analog material, analog material is spread progressive die type pressing shaping device, by compression system to model extrusion forming.
9. a kind of large scale coal and gas prominent analogue experiment installation according to claim 5,7, it is characterized in that, by stud, the steel plate that a piece is of a size of 140cm*50cm*8cm is installed on the top of three groups of hydraulic pistons, 6 row * 15 arrange totally 90 springs and spring guide piece by Stud connection to steel plate.
10. a kind of large scale coal and gas prominent analogue experiment installation according to claim 1, it is characterized in that, aspis installs rupture disk and rupture disk clamping device, this is fitted through flange and completes, install sealing gasket between rupture disk clamping flange and aspis flange, it is firmly seal that rupture disk and rupture disk clamp flange.
11. a kind of large scale coal and gas prominent analogue experiment installations according to claim 1, it is characterized in that, visual glass observation window is arranged on the back side panel of outstanding cavity, and glass vision panel is fixed on back side panel by firm banking.
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Cited By (15)
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| CN105784490A (en) * | 2016-03-01 | 2016-07-20 | 山东科技大学 | Visual monitoring experiment device for coal body damage under gas pressure relief condition |
| CN106053755A (en) * | 2016-05-08 | 2016-10-26 | 西安科技大学 | Coal and gas co-mining three-dimensional physical simulation comprehensive experiment system |
| CN106050211A (en) * | 2016-07-19 | 2016-10-26 | 中国石油大学(北京) | Method for manufacturing test piece for simulating fracture-cavity type carbonate hydrocarbon reservoir volume fracturing |
| CN107389678A (en) * | 2017-06-26 | 2017-11-24 | 重庆大学 | Coal and gas prominent power causes calamity visual virtual design test method |
| CN107515289A (en) * | 2017-10-25 | 2017-12-26 | 辽宁工程技术大学 | A kind of coal and gas prominent simulation test device |
| CN110261220A (en) * | 2018-12-05 | 2019-09-20 | 田成林 | A kind of compound dynamic disaster simulation experiment method of mine for considering top plate and influencing |
| CN110308246A (en) * | 2019-07-02 | 2019-10-08 | 中国矿业大学 | The projecting coal bed water filling extinction technology of one kind and extinction validity check method |
| CN111208272A (en) * | 2020-01-13 | 2020-05-29 | 中煤科工集团重庆研究院有限公司 | Deep well outburst simulation experiment method and rigidity regulation and control device |
| CN111272545A (en) * | 2018-12-05 | 2020-06-12 | 田成林 | Mine composite disaster simulation test system and method considering roof influence |
| CN113030429A (en) * | 2021-03-15 | 2021-06-25 | 中国矿业大学 | Multifunctional coal and gas outburst physical simulation device |
| CN114965937A (en) * | 2021-06-07 | 2022-08-30 | 山东科技大学 | Coal and gas outburst simulation experiment method considering influence of elastic energy of surrounding rock |
| CN115306484A (en) * | 2022-08-29 | 2022-11-08 | 中国矿业大学(北京) | Coal and gas outburst experiment system and method for soft and hard composite coal seam |
| CN116087457B (en) * | 2022-12-23 | 2023-08-29 | 重庆大学 | Method for testing coal and gas outburst induced by graded dynamic load action |
| CN116087458B (en) * | 2022-12-23 | 2023-08-29 | 重庆大学 | Deep buried coal seam gas outburst test system |
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| CN105203427A (en) * | 2015-09-18 | 2015-12-30 | 河南理工大学 | Gas-instant-desorption testing device and method |
| CN105784490A (en) * | 2016-03-01 | 2016-07-20 | 山东科技大学 | Visual monitoring experiment device for coal body damage under gas pressure relief condition |
| CN106053755A (en) * | 2016-05-08 | 2016-10-26 | 西安科技大学 | Coal and gas co-mining three-dimensional physical simulation comprehensive experiment system |
| CN106053755B (en) * | 2016-05-08 | 2018-09-28 | 西安科技大学 | A kind of coal and gas power phenomenon three-dimensional physical simulation comprehensive experimental system |
| CN106050211A (en) * | 2016-07-19 | 2016-10-26 | 中国石油大学(北京) | Method for manufacturing test piece for simulating fracture-cavity type carbonate hydrocarbon reservoir volume fracturing |
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| CN107515289A (en) * | 2017-10-25 | 2017-12-26 | 辽宁工程技术大学 | A kind of coal and gas prominent simulation test device |
| CN111272545A (en) * | 2018-12-05 | 2020-06-12 | 田成林 | Mine composite disaster simulation test system and method considering roof influence |
| CN110261220A (en) * | 2018-12-05 | 2019-09-20 | 田成林 | A kind of compound dynamic disaster simulation experiment method of mine for considering top plate and influencing |
| CN110308246A (en) * | 2019-07-02 | 2019-10-08 | 中国矿业大学 | The projecting coal bed water filling extinction technology of one kind and extinction validity check method |
| CN110308246B (en) * | 2019-07-02 | 2020-09-01 | 中国矿业大学 | Outburst elimination technology for water injection of outburst coal seam and outburst elimination effect test method |
| CN111208272A (en) * | 2020-01-13 | 2020-05-29 | 中煤科工集团重庆研究院有限公司 | Deep well outburst simulation experiment method and rigidity regulation and control device |
| CN113030429A (en) * | 2021-03-15 | 2021-06-25 | 中国矿业大学 | Multifunctional coal and gas outburst physical simulation device |
| CN114965937A (en) * | 2021-06-07 | 2022-08-30 | 山东科技大学 | Coal and gas outburst simulation experiment method considering influence of elastic energy of surrounding rock |
| CN114965937B (en) * | 2021-06-07 | 2024-03-15 | 山东科技大学 | Coal and gas outburst simulation experiment method considering influence of elasticity of surrounding rock |
| CN115306484A (en) * | 2022-08-29 | 2022-11-08 | 中国矿业大学(北京) | Coal and gas outburst experiment system and method for soft and hard composite coal seam |
| CN116087457B (en) * | 2022-12-23 | 2023-08-29 | 重庆大学 | Method for testing coal and gas outburst induced by graded dynamic load action |
| CN116087458B (en) * | 2022-12-23 | 2023-08-29 | 重庆大学 | Deep buried coal seam gas outburst test system |
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| CN104792961B (en) | 2016-08-31 |
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