冲击地压煤层巷帮卸压钻孔施工参数研究
|
摘要
结合巷道侧向支承压力的分布特点,理论分析煤层卸压钻孔的作用机制和塑性区发育特点,提出煤层卸压钻孔的"喇叭"状塑性区防冲机理并藉此确定了陕西某矿巷帮卸压钻孔的合理施工深度。基于莫尔强度理论,利用有限差分软件FLAC3D对比分析了具体地质条件下不同间距及不同布置方式的卸压钻孔对巷帮围岩冲击危险区域解危效果之间的差异,并通过现场试验论证了最优施工参数下的卸压钻孔对于防治冲击地压的效果。结果显示,按照研究结果确定的钻孔参数可使试验区域围岩的大能量震动事件大幅减少,大大降低试验区域的冲击危险性。
Based on distribution characters of roadway lateral abutment pressure,and pressure relief drilling hole mechanism of coal seam and plastic zone distribution character were analyzed,and‘horn'shape plastic zone rock burst prevention mechanism of pressure relief drilling hole in coal seam was put forward,and then reasonable pressure relief drilling hole depth of roadway side of one coal mine in Shaanxi province was determined. Based on Mohr's failure theory,the difference that pressure relief drilling holes with different interval and different arrangement form to rock burst hazard zone relieving in specific geological situation were studied by numerical software FLAC3 D,the results of rock burst prevention and cure with pressure relief drilling hole with the optimal parameters were verified in practical. The results showed that macro-energy shake incidents were decreased obviously under drilling hole parameters,which determined according studying results,and rock burst hazard of experimental field was decreased obviously.
Based on distribution characters of roadway lateral abutment pressure,and pressure relief drilling hole mechanism of coal seam and plastic zone distribution character were analyzed,and‘horn'shape plastic zone rock burst prevention mechanism of pressure relief drilling hole in coal seam was put forward,and then reasonable pressure relief drilling hole depth of roadway side of one coal mine in Shaanxi province was determined. Based on Mohr's failure theory,the difference that pressure relief drilling holes with different interval and different arrangement form to rock burst hazard zone relieving in specific geological situation were studied by numerical software FLAC3 D,the results of rock burst prevention and cure with pressure relief drilling hole with the optimal parameters were verified in practical. The results showed that macro-energy shake incidents were decreased obviously under drilling hole parameters,which determined according studying results,and rock burst hazard of experimental field was decreased obviously.
引文
[1]王书文,潘俊锋,刘少虹,等.基于能量耗散率的钻孔防冲效果评价方法[J].煤炭学报,2016,41(S2):297-304.
[2]林青,纵锋,李根,等.崔木煤矿动静载联合作用下冲击地压防治技术[J].煤矿开采,2016,21(5):86-89.
[3]潘俊锋,宁宇,毛德兵,等.煤矿开采冲击地压启动理论[J].岩石力学与工程学报,2012,31(3):586-596.
[4]夏永学,蓝航,毛德兵.动静载作用下冲击地压启动条件及防治技术[J].煤矿开采,2013,18(5):83-86.
[5]李国玉,李田华.大直径钻孔卸压技术防治巷道冲击危险的研究应用[J].中国煤炭,2016,42(12):76-80.
[6]王书文,毛德兵,任勇.钻孔卸压技术参数优化研究[J].煤矿开采,2010,15(5):14-17.
[7]王坤,曹发义,余岩,等.卸压钻孔不同布置方式的效果分析[J].煤炭科技,2013(1):44-46.
[8]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010.
[9]刘黎,李树刚,刘超,等.集贤煤矿深孔断顶爆破卸压钻孔间距优化[J].煤矿安全,2015,46(10):137-139.
[10]史庆稳.特厚煤层中掘进巷道过联络巷期间巷道围岩活动规律研究[J].中国煤炭,2016,42(2):33-36.
[11]孙训方,方孝淑,关来泰.材料力学(I)[M].北京:高等教育出版社,2009.
[2]林青,纵锋,李根,等.崔木煤矿动静载联合作用下冲击地压防治技术[J].煤矿开采,2016,21(5):86-89.
[3]潘俊锋,宁宇,毛德兵,等.煤矿开采冲击地压启动理论[J].岩石力学与工程学报,2012,31(3):586-596.
[4]夏永学,蓝航,毛德兵.动静载作用下冲击地压启动条件及防治技术[J].煤矿开采,2013,18(5):83-86.
[5]李国玉,李田华.大直径钻孔卸压技术防治巷道冲击危险的研究应用[J].中国煤炭,2016,42(12):76-80.
[6]王书文,毛德兵,任勇.钻孔卸压技术参数优化研究[J].煤矿开采,2010,15(5):14-17.
[7]王坤,曹发义,余岩,等.卸压钻孔不同布置方式的效果分析[J].煤炭科技,2013(1):44-46.
[8]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010.
[9]刘黎,李树刚,刘超,等.集贤煤矿深孔断顶爆破卸压钻孔间距优化[J].煤矿安全,2015,46(10):137-139.
[10]史庆稳.特厚煤层中掘进巷道过联络巷期间巷道围岩活动规律研究[J].中国煤炭,2016,42(2):33-36.
[11]孙训方,方孝淑,关来泰.材料力学(I)[M].北京:高等教育出版社,2009.