上覆遗留煤柱区冲击矿压治理实践
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摘要
煤柱区是高应力集中区,易诱发冲击矿压显现。以三河尖煤矿92206工作面为例,通过理论和数值模拟研究了上覆遗留煤柱区应力分布特征,采用综合指数法分析了区域冲击危险性,并制定和采取了系统的冲击矿压防治技术措施。实践表明:由于上下煤层工作面斜交,遗留煤柱区影响范围大,冲击危险高,采用煤体卸压和顶板预裂防治技术后,煤柱影响区矿震以低能级、多频次形式释放区域煤岩体积聚的弹性变形能,避免强矿震透发冲击矿压灾害显现。
The coal pillar area is a high stress concentration area,which is of high risk for rock burst.Based on the example of 92206 working face in Sanhejian Coal Mine,the stress distribution under overlying coal pillar was theoretically and numerically studied,and the comprehensive index method was applied to analyze the regional rock burst risk,and the monitoring and prevention technique system of rock burst was developed.The practice result showed that,due to the coal seam face oblique affected by the coal pillar area,the rock burst risk was high,after the implementation of coal pressure relief and roof pre-splitting control technique,the energy release seismic turned into low level and high frequent,which avoided rock burst occurrence.
The coal pillar area is a high stress concentration area,which is of high risk for rock burst.Based on the example of 92206 working face in Sanhejian Coal Mine,the stress distribution under overlying coal pillar was theoretically and numerically studied,and the comprehensive index method was applied to analyze the regional rock burst risk,and the monitoring and prevention technique system of rock burst was developed.The practice result showed that,due to the coal seam face oblique affected by the coal pillar area,the rock burst risk was high,after the implementation of coal pressure relief and roof pre-splitting control technique,the energy release seismic turned into low level and high frequent,which avoided rock burst occurrence.
引文
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[10]何江,窦林名,贺虎,等.综放面覆岩运动诱发冲击矿压机制研究[J].岩石力学与工程学报,2011(S2):3920-3927.
[2]窦林名,何学秋.冲击矿压防治理论及技术[M].徐州:中国矿业大学出版社,2001.
[3]窦林名,何江,曹安业,等.煤矿冲击矿压动静载叠加原理及其防治[J].煤炭学报,2015(7):1469-1476.
[4]姜福兴,杨淑华,Xun Luo.微地震监测揭示的采场围岩空间破裂形态[J].煤炭学报,2003,28(4):357-360.
[5]杨伟利,姜福兴,温经林,等.遗留煤柱诱发冲击地压机理及其防治技术研究[J].采矿与安全工程学报,2014(6):876-880,887.
[6]李佃平,窦林名,牟宗龙,等.孤岛型边角煤柱工作面反弧形覆岩结构诱冲机理及其控制[J].煤炭学报,2012(5):719-724.
[7]李振雷,窦林名,蔡武,等.深部厚煤层断层煤柱型冲击矿压机制研究[J].岩石力学与工程学报,2013(2):333-342.
[8]刘振江,牟宗龙,窦林名,等.深部下山煤柱区矿震规律研究[J].金属矿山,2013(11):146-149.
[9]窦林名,何学秋.煤矿冲击矿压的分级预测研究[J].中国矿业大学学报,2007(6):717-722.
[10]何江,窦林名,贺虎,等.综放面覆岩运动诱发冲击矿压机制研究[J].岩石力学与工程学报,2011(S2):3920-3927.