CN112364519A - Large-diameter drilling parameter determination method for extracting upper corner gas - Google Patents
Large-diameter drilling parameter determination method for extracting upper corner gas Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims abstract description 17
- 230000035699 permeability Effects 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 15
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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
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Abstract
A large-diameter drilling parameter determination method for extracting upper corner gas comprises the following steps: testing the wind speed of an air inlet tunnel of the stope face and the gas emission quantity of the stope face; collecting rock samples at the top plate of the working face on the upper corner site; processing the collected rock sample into a standard coal rock test piece in a laboratory, and testing the porosity, permeability and crushing expansion coefficient of the original rock to obtain the permeability of the goaf after crushing expansion; establishing a numerical calculation model of the gas concentration of the upper corner; and determining drilling parameters according to the numerical calculation model of the gas concentration of the upper corner. The method overcomes the error of coal mine workers determining the drilling parameters by experience, has scientific principle, is simple in operation process by acquiring samples on site and then performing analog calculation in a laboratory, and is beneficial to popularization and application of the technology for extracting the upper corner gas by large-diameter drilling.
Description
Technical Field
The invention belongs to the technical field of gas control, and particularly relates to a large-diameter drilling parameter determination method for extracting upper corner gas.
Background
The upper corner gas treatment is the central importance in the production process of a stope face, and the upper corner gas treatment method mainly comprises the methods of goaf buried pipe extraction, high-position drilling extraction, upper corner extraction by using a gas treatment roadway, ejector installation and the like.
The gas extraction technology of the upper corners of the large-diameter drill holes is applied in recent years, namely, the upper corners of the working face are extracted by returning air to a roadway from an adjacent roadway to the working face, constructing the large-diameter drill holes at intervals and connecting a gas extraction system.
The gas extraction technology of the upper corner of the large-diameter drill hole realizes large-flow low-negative-pressure gas extraction of the goaf and reduces the gas concentration of the upper corner. At present, the parameters of the large-diameter drill hole are determined mainly through experience in a coal mine, but the effect of the large-diameter drill hole in the practical application process is different due to the difference of practical experience of coal mine personnel. How to accurately determine parameters such as the diameter and the pitch of the large-diameter drill hole becomes a key for popularizing the technology.
Disclosure of Invention
The invention aims to solve the problem of upper corner gas accumulation in the prior art, and provides a large-diameter drilling parameter determination method for extracting upper corner gas, which is high in operability, improves the gas extraction effect, and is safer and more reliable.
In order to solve the technical problems, the invention adopts the following technical scheme: a large-diameter drilling parameter determination method for extracting upper corner gas comprises the following steps:
(I) testing the wind speed V of the air intake tunnel of the stope1And the gas emission quantity Q of the stope face;
secondly, collecting rock samples at the top plate of the working face on the upper corner site by a drilling sampling method;
(III) processing the rock sample collected in the step (II) into a standard coal rock test piece in a laboratory, and testing the porosity of the original rockn s Permeability, permeabilityK s And coefficient of crushing and expansionK r ；
Porosity of rock after crushing and expansionnComprises the following steps:
；
goaf permeability after crushing and expansionKComprises the following steps:
；
fourthly, establishing a numerical calculation model of the upper corner gas concentration according to the permeability of the goaf calculated in the third step;
and (V) determining drilling parameters according to the numerical calculation model of the gas concentration of the upper corner.
The numerical calculation model in the step (IV) is as follows:
in the formula:
the upper corner gas concentration; l is the borehole spacing, m; r is the borehole diameter, m; mgIs the molecular weight of the gas; r is an ideal gas constant; q is the gas emission quantity of the working face;
is a model constant; v is the working face roadway wind speed; k is the goaf permeability; e is a natural constant.
The drilling parameters comprise drilling diameter r and drilling distance L, and the specific process of determining the drilling distance comprises the steps of firstly setting the drilling diameter r as a certain value, and simulating the drilling distance L to be L respectively by utilizing a numerical model1、L2、L3… …, determining the optimal value of the borehole spacing L by analyzing the upper corner gas concentration under different borehole spacing conditions and combining the engineering quantity, the cost and the gas extraction effect, wherein n is a natural number.
The specific process for determining the diameter r of the drill hole comprises the steps that under the condition that the distance L between the drill holes is kept to be the optimal value, the numerical calculation model can show that when the diameter r of the drill hole is increased, the value of the gas concentration of the upper corner is reduced, the problem that the diameter of the drill hole is too large, the construction drilling engineering cost is too high is considered, the extraction effect and the construction cost are comprehensively considered, and the optimal value of the drill hole r is determined.
By adopting the technical scheme, the invention combines the test to calculate the rock crushing expansion coefficient and the porosity of the goaf according to the air speed of the air inlet roadway of the stope face and the gas emission quantity parameter of the stope face, establishes a numerical calculation model of the upper corner gas concentration, and calculates the molecular weight M of the gas in the numerical calculation modelgThe ideal gas constant R can be directly inquired from a technical manual, the gas emission quantity Q of the working face, the roadway wind speed v of the working face and the permeability K of the goaf can be measured on site through an instrument, and the model constant
Can be obtained by inquiring numerical simulation software; through the parameters, the gas concentration of the upper corner under the conditions of different drilling hole diameters, drilling hole intervals and the like is simulated, and the large-diameter drilling hole parameter when the gas concentration of the upper corner is the minimum is obtained. The method overcomes the error of coal mine workers determining the drilling parameters by experience, has scientific principle, is simple in operation process by acquiring samples on site and then performing analog calculation in a laboratory, and is beneficial to popularization and application of the technology for extracting the upper corner gas by large-diameter drilling.
Drawings
FIG. 1 is a graph of the variation of upper corner gas concentration along the hole spacing;
FIG. 2 is a graph of borehole diameter size versus upper corner gas concentration;
FIG. 3 is a plan view of a field layout of a large diameter borehole;
fig. 4 is a sectional view a-a in fig. 3.
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.
As shown in fig. 1 to 4, the method for determining the large-diameter drilling parameters for extracting the upper corner gas comprises the following steps:
(I) testing the wind speed V of the air intake tunnel of the stope1And the gas emission quantity Q of the stope face;
secondly, collecting rock samples at the top plate of the working face on the upper corner site by a drilling sampling method;
(III) processing the rock sample collected in the step (II) into a standard coal rock test piece in a laboratory, and testing the porosity of the original rockn s Permeability, permeabilityK s And coefficient of crushing and expansionK r ；
Porosity of rock after crushing and expansionnComprises the following steps:
；
goaf permeability after crushing and expansionKComprises the following steps:
；
fourthly, establishing a numerical calculation model of the upper corner gas concentration according to the permeability of the goaf calculated in the third step;
and (V) determining drilling parameters according to the numerical calculation model of the gas concentration of the upper corner.
The numerical calculation model in the step (IV) is as follows:
in the formula:
the upper corner gas concentration; l is the borehole spacing, m; r is the borehole diameter, m; mgIs the molecular weight of the gas; r is an ideal gas constant; q is the gas emission quantity of the working face;
is a model constant; v is the working face roadway wind speed; k is the goaf permeability; e is a natural constant.
The large diameter drilling layout is schematically shown in fig. 3 and 4, and the determination process of the drilling distance and the drilling diameter comprises the following steps: firstly, setting the diameter of a drill hole to be 300mm, and simulating the gas concentration at an upper corner under the conditions that the distances among the drill holes are respectively 3 m, 4 m, 5 m, 6m, 7 m and 8 m; the upper corner gas concentrations were simulated for different combinations of borehole diameter and borehole spacing in the manner described above. And determining the diameter and the distance of the drill holes by analyzing the gas concentration of the upper corner under the conditions of different hole diameters and different drill hole distances.
The specific process is as follows:
firstly, determining the drilling distance L: determining the diameter r of the drilled hole to be 300mm, establishing six models by utilizing the parameters under the condition that the simulated gas drilling intervals L are 3 m, 4 m, 5 m, 6m, 7 m and 8 m, simulating the gas concentration of the upper corner, and analyzing the effect of different drainage intervals on the gas of the upper corner, as shown in figure 1.
As can be seen from fig. 1, the smaller the borehole interval L, the better the extraction effect, but the excessive reduction of the borehole interval L to reduce the upper corner gas concentration increases the amount of work for constructing boreholes. And comprehensively considering the gas extraction effect and the construction work amount, and determining the gas drilling interval L as 6 m.
The borehole diameter r is then determined: under the condition that the drill hole diameter r is kept at 6m, five models are established, and when the simulated drill hole diameters r are respectively set to 300mm, 350mm, 400 mm, 450 mm and 500mm, the gas extraction effect of the upper corners by different drill hole diameters r is examined, as shown in fig. 2.
As can be seen from fig. 2, when the bore diameter r exceeds 350mm, the upper corner gas concentration continues to decrease with increasing bore diameter, but slightly, 350mm is similar to the inflection point of the curve, and when the bore diameter r reaches 350mm, the effect of further decreasing the upper corner gas concentration is slight by continuing to increase the bore diameter r, and the optimum bore diameter r is determined to be 350mm according to the simulation result.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A large-diameter drilling parameter determination method for extracting upper corner gas is characterized by comprising the following steps: the method comprises the following steps:
(I) testing the wind speed V of the air intake tunnel of the stope1And the gas emission quantity Q of the stope face;
secondly, collecting rock samples at the top plate of the working face on the upper corner site by a drilling sampling method;
(III) processing the rock sample collected in the step (II) into a standard coal rock test piece in a laboratory, and testing the porosity of the original rockn s Permeability, permeabilityK s And coefficient of crushing and expansionK r ；
Porosity of rock after crushing and expansionnComprises the following steps:
；
goaf permeability after crushing and expansionKComprises the following steps:
；
fourthly, establishing a numerical calculation model of the upper corner gas concentration according to the permeability of the goaf calculated in the third step;
and (V) determining drilling parameters according to the numerical calculation model of the gas concentration of the upper corner.
2. The method for determining the large-diameter drilling parameters for extracting upper corner gas as claimed in claim 1, wherein the method comprises the following steps: the numerical calculation model in the step (IV) is as follows:
in the formula:
the upper corner gas concentration; l is the borehole spacing, m; r is the borehole diameter, m; mgIs the molecular weight of the gas; r is an ideal gas constant; q is the gas emission quantity of the working face;
is a model constant; v is the working face roadway wind speed; k is the goaf permeability; e is a natural constant.
3. The method for determining the large-diameter drilling parameters for extracting upper corner gas as claimed in claim 2, wherein the method comprises the following steps: the drilling parameters comprise drilling diameter r and drilling distance L, and the specific process of determining the drilling distance comprises the steps of firstly setting the drilling diameter r as a certain value, and simulating the drilling distance L to be L respectively by utilizing a numerical model1、L2、L3… …, determining the optimal value of the borehole spacing L by analyzing the upper corner gas concentration under different borehole spacing conditions and combining the engineering quantity, the cost and the gas extraction effect, wherein n is a natural number.
4. The method for determining large-diameter drilling parameters for extracting upper corner gas as claimed in claim 3, wherein the method comprises the following steps: the specific process for determining the diameter r of the drill hole comprises the steps that under the condition that the distance L between the drill holes is kept to be the optimal value, the numerical calculation model can show that when the diameter r of the drill hole is increased, the value of the gas concentration of the upper corner is reduced, the problem that the diameter of the drill hole is too large, the construction drilling engineering cost is too high is considered, the extraction effect and the construction cost are comprehensively considered, and the optimal value of the drill hole r is determined.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113266409A (en) * | 2021-05-26 | 2021-08-17 | 中煤科工集团沈阳研究院有限公司 | Low-oxygen prevention and control method for mine working face |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA200801780A1 (en) * | 2008-07-14 | 2010-02-26 | Открытое Акционерное Общество "Белгорхимпром" (Оао "Белгорхимпром") | METHOD OF UNDERGROUND DEVELOPMENT OF STONE CARBON MONEY |
| CN103821554A (en) * | 2014-03-07 | 2014-05-28 | 重庆大学 | Coal pillar-free exploitation Y-shaped venting goaf drilling hole location method |
| CN104462654A (en) * | 2014-11-11 | 2015-03-25 | 中国矿业大学 | Shallow burial coal mining earth surface interpenetrated crack distribution and air leakage characteristic judgment method |
| US20190071967A1 (en) * | 2016-04-29 | 2019-03-07 | China University Of Mining And Technology | Design method for mining upper protective seam close to total rock for use in coal-bed mining |
| CN109446602A (en) * | 2018-10-15 | 2019-03-08 | 内蒙古科技大学 | A kind of Numerical Experimental Method of surface vertical borehole extraction super high seam gas |
| CN110424949A (en) * | 2019-06-24 | 2019-11-08 | 中国矿业大学 | The Inversion Calculation method that coal-bed gas parameter is quickly tested with brill |
| CN111594259A (en) * | 2020-05-27 | 2020-08-28 | 中煤科工集团重庆研究院有限公司 | Method for controlling gas emission in initial mining period of fully mechanized caving face and construction method thereof |
-
2020
- 2020-11-19 CN CN202011305461.1A patent/CN112364519B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA200801780A1 (en) * | 2008-07-14 | 2010-02-26 | Открытое Акционерное Общество "Белгорхимпром" (Оао "Белгорхимпром") | METHOD OF UNDERGROUND DEVELOPMENT OF STONE CARBON MONEY |
| CN103821554A (en) * | 2014-03-07 | 2014-05-28 | 重庆大学 | Coal pillar-free exploitation Y-shaped venting goaf drilling hole location method |
| CN104462654A (en) * | 2014-11-11 | 2015-03-25 | 中国矿业大学 | Shallow burial coal mining earth surface interpenetrated crack distribution and air leakage characteristic judgment method |
| US20190071967A1 (en) * | 2016-04-29 | 2019-03-07 | China University Of Mining And Technology | Design method for mining upper protective seam close to total rock for use in coal-bed mining |
| CN109446602A (en) * | 2018-10-15 | 2019-03-08 | 内蒙古科技大学 | A kind of Numerical Experimental Method of surface vertical borehole extraction super high seam gas |
| CN110424949A (en) * | 2019-06-24 | 2019-11-08 | 中国矿业大学 | The Inversion Calculation method that coal-bed gas parameter is quickly tested with brill |
| CN111594259A (en) * | 2020-05-27 | 2020-08-28 | 中煤科工集团重庆研究院有限公司 | Method for controlling gas emission in initial mining period of fully mechanized caving face and construction method thereof |
Non-Patent Citations (5)
| Title |
|---|
| 孙晓元;王川;孙英峰;邢云峰;: "基于回采工作面流场分布的拖管抽采瓦斯参数模拟研究", 中国煤炭, no. 12 * |
| 汪开旺;: "超大直径钻孔治理上隅角瓦斯工艺研究", 矿业安全与环保, no. 02 * |
| 王松领;张清阳;郑银超;谢晨龙;: "高位巷与大直径水平长钻孔抽采采空区瓦斯效果对比分析", 煤, no. 02 * |
| 葛林;李炫烨;张东阳;: "高位钻孔终孔间距与钻孔个数对抽采量的影响分析", 煤矿安全, no. 06 * |
| 邹炜;: "腾晖矿大孔径钻孔瓦斯抽采技术研究及应用", 煤炭技术, no. 05 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266409A (en) * | 2021-05-26 | 2021-08-17 | 中煤科工集团沈阳研究院有限公司 | Low-oxygen prevention and control method for mine working face |
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