冲击地压煤层高位钻孔抽采参数优化研究

Study on Parameters Optimization of High Level Extraction Boreholes in Rock Burst Seam

摘要: 为优化高位钻孔参数,提高冲击地压煤层采空区上隅角瓦斯治理效果,以唐口煤矿5304工作面为工程背景,运用FLUENT流体仿真软件对不同参数高位钻孔瓦斯抽采模型进行了模拟分析。结果表明:高位钻孔终孔高度6倍采高,距煤层底板距离为27 m,钻场内钻孔数量为2个时可以达到最优抽放效果。现场实践表明采用优化钻孔可以控制工作面回风瓦斯体积分数最大值为0.56%,平均值为0.39%。
- 冲击地压 /
- 高位钻孔 /
- 上隅角 /
- 数值模拟 /
- 瓦斯抽采 /
- 瓦斯治理
Abstract: For the optimization of high level borehole parameters, improving the effect of gas control in upper corner of rock burst coal seam, taking 5304 working face in Tangkou Coal Mine as engineering background, the methane extraction models of different high level borehole parameters were analyzed by fluid simulation software FLUENT. The numerical results show that the optimal effect of methane extraction can be achieved when terminating height of high level borehole is 27 meters and it is six times that of the mining thickness, and drilling 2 holes in each drilling field. Field practice shows that the maximum return air gas volume fraction at working face is 0.56%, the average value was 0.39%.
- rock burst /
- high level borehole /
- upper corner /
- numerical simulation /
- gas extraction /
- gas control

[1]	谢和平,周宏伟,薛东杰,等.煤炭深部开采与极限开采深度的研究与思考[J].煤炭学报,2012,37(4):535.
[2]	张农,李希勇,郑西贵,等.深部煤炭资源开采现状与技术挑战[M].徐州:中国矿业大学出版社,2013:10.
[3]	程远平,付建华,俞启香.中国煤矿瓦斯抽采技术的发展[J].采矿与安全工程学报,2009,26(2):127-139.
[4]	朱红青,张民波,冯世梁,等.高位孔抽采上被保护层卸压瓦斯的研究及其应用[J].中国安全科学学报,2013,23(2):92-96.
[5]	张晓磊,程远平,王亮,等.煤与瓦斯突出矿井工作面顶板高位钻孔优化设计[J].煤炭科学技术,2014,42(10):66-70.
[6]	刘桂丽,杨跃奎,撒占友.高位钻孔瓦斯抽采参数优化设计[J].西安科技大学学报,2012,32(4):450-458.
[7]	张国华,侯凤才.预留瓦斯抽放钻场中钻场间距及布孔参数的确定[J].煤炭学报,2008,33(9):992-996.
[8]	高振勇.采动裂缝带瓦斯抽采技术及工程实践[J].煤矿开采,2014,19(4):126-129.
[9]	Guang Xu, Edmund C. Jong, Kray D. Luxbacher, et al. Remote characterization of ventilation systems using tracer gas and CFD in an underground mine[J]. Safety Science, 2015,74(5):140-149.
[10]	Zongyi Qin, Liang Yuan, Hua Guo, et al. Investigation of longwall goaf gas flows and borehole drainage performance by CFD simulation [J]. International Journal of Coal Geology, 2015,150 (10): 51-63.