<div> CO2气相压裂煤层瓦斯参数测试及数值模拟分析 </div>

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CO2气相压裂煤层瓦斯参数测试及数值模拟分析

五虎山煤矿所开采的山西组 9# 煤层为高瓦斯难抽采煤层，回采期间瓦斯抽采效率低

下，严重制约了煤矿的安全高效生产。为探究适配的CO2气相压裂瓦斯治理技术方案，在瓦斯治理巷

开展 CO2气相压裂瓦斯参数测试。测试结果表明，气相压裂过后，平均瓦斯含量从 8.26 m3 /t 降低到

7.67 m3 /t，降低了 7%；Langmuir吸附体积由 19.096 9 cm3 /g 提高到 20.265 7 cm3 /g，提高了 6.12%；煤层

透气性系数从 0.022~0.027 提高到 0.780~0.791，提高了 28~35 倍。基于瓦斯参数测试结果，建立

COMSOL Multiphysics流固耦合模型，模拟气相压裂前后瓦斯抽采半径。模拟结果表明，气相压裂后

煤层瓦斯抽采半径大幅度提高，抽采180 d后抽采半径从0.63 m提高到4.13 m，提高5.56倍。在抽采

时间为6个月时，可按照8 m的孔间距布置气相压裂钻孔，即可获得良好的瓦斯抽采效果。该研究成

果可为类似条件煤矿的瓦斯治理提供借鉴。

1. 国家能源集团乌海能源有限责任公司；

2. 河南理工大学资源环境学院

出版日期:2024-06-17 发布日期:2024-08-06

Coal Seam Gas Parameters Testing and Numerical Simulation Analysis

with CO2 Gas Phase Fracturing

The 9# coal seam of Shanxi Formation mined by Wuhushan Coal Mine is a high gas and dif⁃

ficult to extract coal seam. The efficiency of gas extraction during mining is low，which seriously restricts

the safe and efficient production of coal mines.In order to explore the suitable CO2 gas phase fracturing gas

control technology scheme，the CO2 gas phase fracturing gas parameter test is carried out in the gas control

roadway.The test results show that after the gas phase fracturing，the average gas content is reduced from

8.26 m3 /t to 7.67 m3 /t，which is reduced by 7%.The Langmuir adsorption volume increased from 19.096 9

cm3 / g to 20.265 7 cm3 / g，an increase of 6.12%.The permeability coefficient of coal seam increased from

0.022~0.027 to 0.780~0.791，which increased by 28~35 times.Based on the test results of gas parameters，

a COMSOL Multiphysics fluid-solid coupling model is established to simulate the gas extraction radius be⁃

fore and after gas phase fracturing.The simulation results show that the gas extraction radius of coal seam is

greatly improved after gas phase fracturing，and the extraction radius is increased from 0.63 m to 4.13 m af⁃

ter 180 days of extraction，which is increased by 5.56 times.When the extraction time is 6 months，the gas

phase fracturing boreholes can be arranged according to the hole spacing of 8 m，and a good gas extraction

effect can be obtained.The research results can provide reference for gas control in coal mines with similar

conditions.

#br#

1. Wuhai Energy Co.，Ltd.，CHN Energy；2. College of Resources and Environment，Henan Polytechnic University

Online:2024-06-17 Published:2024-08-06

摘要/Abstract

摘要：

五虎山煤矿所开采的山西组 9# 煤层为高瓦斯难抽采煤层，回采期间瓦斯抽采效率低

下，严重制约了煤矿的安全高效生产。为探究适配的CO2气相压裂瓦斯治理技术方案，在瓦斯治理巷

开展 CO2气相压裂瓦斯参数测试。测试结果表明，气相压裂过后，平均瓦斯含量从 8.26 m3 /t 降低到

7.67 m3 /t，降低了 7%；Langmuir吸附体积由 19.096 9 cm3 /g 提高到 20.265 7 cm3 /g，提高了 6.12%；煤层

透气性系数从 0.022~0.027 提高到 0.780~0.791，提高了 28~35 倍。基于瓦斯参数测试结果，建立

COMSOL Multiphysics流固耦合模型，模拟气相压裂前后瓦斯抽采半径。模拟结果表明，气相压裂后

煤层瓦斯抽采半径大幅度提高，抽采180 d后抽采半径从0.63 m提高到4.13 m，提高5.56倍。在抽采

时间为6个月时，可按照8 m的孔间距布置气相压裂钻孔，即可获得良好的瓦斯抽采效果。该研究成

果可为类似条件煤矿的瓦斯治理提供借鉴。

关键词:

CO2气相压裂煤层瓦斯抽采半径

Abstract:

The 9# coal seam of Shanxi Formation mined by Wuhushan Coal Mine is a high gas and dif⁃

ficult to extract coal seam. The efficiency of gas extraction during mining is low，which seriously restricts

the safe and efficient production of coal mines.In order to explore the suitable CO2 gas phase fracturing gas

control technology scheme，the CO2 gas phase fracturing gas parameter test is carried out in the gas control

roadway.The test results show that after the gas phase fracturing，the average gas content is reduced from

8.26 m3 /t to 7.67 m3 /t，which is reduced by 7%.The Langmuir adsorption volume increased from 19.096 9

cm3 / g to 20.265 7 cm3 / g，an increase of 6.12%.The permeability coefficient of coal seam increased from

0.022~0.027 to 0.780~0.791，which increased by 28~35 times.Based on the test results of gas parameters，

a COMSOL Multiphysics fluid-solid coupling model is established to simulate the gas extraction radius be⁃

fore and after gas phase fracturing.The simulation results show that the gas extraction radius of coal seam is

greatly improved after gas phase fracturing，and the extraction radius is increased from 0.63 m to 4.13 m af⁃

ter 180 days of extraction，which is increased by 5.56 times.When the extraction time is 6 months，the gas

phase fracturing boreholes can be arranged according to the hole spacing of 8 m，and a good gas extraction

effect can be obtained.The research results can provide reference for gas control in coal mines with similar

conditions.

Key words:

CO2 gas phase fracturing, coal seam gas, extraction radius

杨希培杨百舸徐锋懿.

CO2气相压裂煤层瓦斯参数测试及数值模拟分析

[J]. 现代矿业, 2024, 40(06): 31-.

YANG Xipei YANG Baige XU Fengyi.

Coal Seam Gas Parameters Testing and Numerical Simulation Analysis

with CO2 Gas Phase Fracturing

[J]. Modern Mining, 2024, 40(06): 31-.

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