| 低透气煤层预裂瓦斯运移数值模拟及抽采试验 |
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| 引用本文： | 刘泽功,张春华,刘健,蔡峰,李连崇.低透气煤层预裂瓦斯运移数值模拟及抽采试验[J].安徽理工大学学报(自然科学版),2009,29(4):17-21. |
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| 作者姓名： | 刘泽功 张春华 刘健 蔡峰 李连崇 |
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| 作者单位： | 1. 安徽理工大学能源与安全学院,安徽淮南,232001;安徽理工大学煤矿安全高效开采省部共建教育部实验室,安徽淮南,232001
2. 大连理工大学岩石破裂与失稳研究中心,辽宁大连,116024 |
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| 基金项目： | 国家自然科学基金，中国高校博士点基金 |
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| 摘 要： | 针对高瓦斯低透气性煤层瓦斯抽采难问题,利用数值模拟软件RFPA2D-Flow再现了采取煤层深孔爆破预裂后,瓦斯在煤层及爆生裂隙中的流动规律.研究结果表明,预裂圈内煤和岩石的孔隙率大大提高,煤层透气性显著增加,但当裂隙圈之间不相交时,瓦斯同样很难在完整的低透气性煤体中运移,因此只有当抽采瓦斯钻孔处在裂隙圈中才能高效抽采瓦斯.现场试验证实,低透气性煤层预裂后,有效导通裂隙增加,布置在裂隙圈内抽采瓦斯钻孔可以获得高效抽采瓦斯效果,从而降低煤与瓦斯突出危险性.
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| 关 键 词： | 高瓦斯煤层 深孔爆破 预裂圈 瓦斯运移 |
Numerical Simulation of Gas Migration in Pre-splitted Coal Seam with Low Permeability and Experiment of Gas Extraction |
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| LIU Ze-gong,ZHANG Chun-hua,LIU Jian,CAI Feng,LI Lian-chong.Numerical Simulation of Gas Migration in Pre-splitted Coal Seam with Low Permeability and Experiment of Gas Extraction[J].Journal of Anhui University of Science and Technology:Natural Science,2009,29(4):17-21. |
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| Authors: | LIU Ze-gong ZHANG Chun-hua LIU Jian CAI Feng LI Lian-chong |
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| Institution: | LIU Ze-gong~(1,2),ZHANG Chun-hua~(1,LIU Jian~(1,2) CAI Feng~(1,LI Lian-chong~3 (1.School of Energy and Safety,Anhui University of Science and Technology,Huainan Anhui 232001,China,2.Key Laboratory of Coal Mining Safety and High Efficient Mining of Ministry of Education,3.Research Center of Rock Outbirst and Instability,Dalian University of Technology,Dalian Liaoning 116024,China) |
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| Abstract: | The object of the study is difficult gas extraction in coal seam with high gas and low permeability. The law of gas flow in the coal body and cracks caused by pre-splitting blasting in long-hole was simulated by use of software RFPA~(2D)-Flow.The results showed that porosity rate of the coal body and rock mass and the permeability in pre-splitting zones increased significantly.However,gas migration in not splitted part of the coal body with low permiability is still very difficult,when pre-splitting zones d... |
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| Keywords: | high-gas coal seam blasting in long-hole pre-splitting zone gas migration |
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