摘要
基于岩层控制的关键层理论,对工作面开采过程中相邻采空区震动机理进行了研究,将相邻采空区震动机理归结为3种基本形式:①低位亚关键层回转滑移失稳;②高位亚关键层剪切滑移失稳;③主关键层极限破断失稳。利用现场矿井微震监测系统,分析了不同机理震动规律,结果表明,相邻采空区岩层失稳滞后于本工作面岩层运动,震动频次上低位亚关键层最高,高位亚关键层次之,主关键层极限破断失稳震动最少,震动能量上则相反;本工作面破坏烈度则是高位亚关键层剪切滑移失稳最强,低位亚关键层失稳震动次之,而主关键层最小。最后,根据震动诱发动力冲击的能量机理,提出了相邻采空区震动灾害的治理措施,并在现场实施应用。
Based on the key strata theory in ground control,researched on mechanism of mining tremor induced by key strata instability in the gob beside the working face,and summarized three basic mechanism types that：① Rotary slipping instability of the low inferior key strata,② shear slipping instability of high inferior key strata,③ ultimate rupture of maim key strata.The different rules of mining tremor under different mechanisms were studied using the micro-seismic observing system installed around the working face.The results show that mining shocks in the gob induced by strata instability lag the strata movement in the working face,low inferior key strata have the most frequency of the tremor,follow by the high inferior key strata and the key strata least,the released energy lever is just opposite.The most damage intensity to the working face or roadways is caused by the high inferior key strata,secondly the low inferior key strata and at last the main key strata caused the lighting lever.Based on the energy of rock burst combined the researches on the mechanism,in the end,the prevent and control strategies for the tremor disaster in the gob were put forward and implemented in the coal mines.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第12期1957-1962,共6页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2010CB226805)
国家自然科学基金资助项目(50490273
50474068)
煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM10X05)
关键词
相邻采空区
关键层
失稳
矿震
冲击矿压
the gob beside the working face
key strata
instability
mine tremor
rockburst
