摘要
为得出断层冲击地压发生的危险性,以耿村煤矿为背景,借助数值模拟、相似模拟实验等手段研究了逆断层上、下盘开采时应力变化及断层活化过程。建立数值模型,将工作面布置在上盘,研究了工作面开采时断层面不同位置应力及滑移量变化,得出了工作面距断层80~10m范围内的活化程度及冲击地压危险性;将工作面布置在下盘,研究了开采过程中断层面应力分布及变形量演化规律;借助相似模拟实验,研究了逆断层下盘开采时断层面位移变化及断层活化过程,通过对两种手段研究结果的对比分析,表明逆断层下盘开采时断层活化的危险性高于上盘开采,当工作面距断层10m时最易导致断层的活化并诱发冲击地压的发生,活化区域为煤层顶板以上20~30m范围。本研究为工作面开采过程冲击地压的防治提供了理论依据。
To obtain the risk of rockburst,based on the geological conditions of Gengcun Coal Mine,the variation of stress and activation of fault were studied when mining in hanging wall or footwall of reverse fault with numerical modeling and similar simulation experiment.By establishing numerical model,the working face was arranged in hanging wall,the variations of stress and slips at different positions of the fault plane were studied during mining,and the activation degree of the fault and rockburst risk were obtained within the distance of 80~10 m from fault to working face.The stress distribution and deformation evolution were studied during mining in footwall.By similar simulation experiment,the displacement of the plane and the fault activation were studied during mining in footwall of the reserve fault.Through the comparative analysis of the results of the two methods,it is shown that the risk of fault activation during mining in footwall is higher than in hanging wall.When the working face is 10 m away from the fault,it is most likely to lead to fault activation and then rockburst,and the activation area is 20~30 m above the coal seam roof.
作者
魏世明
王富莹
张泽升
WEI Shi-ming;WANG Fu-ying;ZHANG Ze-sheng(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Collaborative Innovation Center of Coal Work Safety(Henan Province),Jiaozuo 454000,China)
出处
《煤炭工程》
北大核心
2022年第11期124-130,共7页
Coal Engineering
基金
国家自然科学基金资助项目(51674099)
关键词
逆断层
上、下盘
冲击地压
数值模拟
相似模拟
reverse fault
hanging wall or footwall
rockburst
numerical modelling
similar simulation
作者简介
魏世明(1979—),男,河南兰考人,博士,副教授,主要从事采矿工程、岩石力学及光纤传感监测方面的教学及研究工作,E-mail:sming2002cn@163.com
