| 煤层瓦斯预抽方案优化设计 |
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| 引用本文： | 李建云.煤层瓦斯预抽方案优化设计[J].煤炭科学技术,2011,39(6):46-48. |
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| 作者姓名： | 李建云 |
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| 作者单位： | 中国矿业大学安全工程学院,江苏徐州221008;国家煤矿安全监察局,北京100713 |
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| 摘 要： | 为了解决煤层瓦斯抽放中遇到的采掘工作面瓦斯超限和煤与瓦斯突出问题,提高采煤工作面瓦斯抽放效果,以新安矿14221工作面为研究对象,对其进行了顺层平行不同钻孔间距下的瓦斯预抽试验,考察了钻孔瓦斯抽放量随时间的变化规律和不同钻孔间距下预抽率与时间的关系。结果表明:当深孔抽放钻孔间距为1.5 m时,其抽放效果为钻孔抽放间距2.5 m的1.24倍。同时将新安矿本煤层由平行钻孔改为斜向钻孔相间布置后,钻孔瓦斯抽放浓度提高了0.32倍,取得了较好的瓦斯抽放效果。
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| 关 键 词： | 瓦斯 顺层平行抽放钻孔 交叉钻孔 预抽 |
Optimized Design of Seam Gas Pre-drainage Plan |
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| LI Jian-yun.Optimized Design of Seam Gas Pre-drainage Plan[J].Coal Science and Technology,2011,39(6):46-48. |
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| Authors: | LI Jian-yun |
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| Affiliation: | LI Jian-yun1,2(1.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221008,China,2.State Administration of Coal Mine Safety Supervision,Beijing 100713,China) |
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| Abstract: | In order to solve the gas content over limit and the coal and gas outburst problems of the excavation and mining faces during the seam gas drainage and to improve the gas drainage effect of the coal mining face,taking the No.14221 coal mining face of Xin'an Mine as the study object,a gas pre-drainage experiment with different borehole space in and along the seam was conducted.The variation law of the borehole gas drainage value with the time and the relationship between the pre-drainage rate and the time un... |
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| Keywords: | gas gas drainage borehole in and along seam cross boreholes pre-drainage |
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