采矿与安全工程学报2017，Vol.34Issue(1)：74-78,102,6.DOI:10.13545/j.cnki.jmse.2017.01.011
基于微震监测的深埋“两硬”综放面覆岩运动规律研究
The study of motion regularity of overlying strata over deep-buried "dual hard" fully-mechanized workface based on microseismic monitoring
摘要
Abstract
Based on microseismic monitoring and key stratum theory,the motion regularity of overly-ing strata over deep-buried "dual hard" longwall top coal caving workface is analyzed,and the step dis-tance which may cause rock burst induced by mine quake in working face 3302 of Xingcun coal mine is predicted.The results have shown that the average broken height of roof is 82.5 m;the major cause of the periodic weighting is the 3rd hard rock formations which form "masonry beam" after breaking,and the step distance was 36.3～38.7 with the average of 37.6 m;the weighting step distance caused by breaking of the 6th hard rock formation was 50.4～64.8 m with the average of 57.6 m.During the goaf square,the 3rd and the 6th high level hard rock roof break at the same time;meanwhile the multi-ple-layer sandstone more than 80m above the roofs all break and release a lot of elastic energy,which is more likely to cause mine tremor.Two 1.5-magnitude mine tremors occurred at the expected location,which proved the feasibility of the mine tremor prediction.关键词
冲击地压/微震监测/覆岩运动规律/关键层/矿震Key words
rock burst/micro seismic monitoring and measuring/the regularity of overlying strata movement/key stratum/mine tremor分类
矿业与冶金引用本文复制引用
秦忠诚,刘玉腾,王生超,蔡辉,王备备..基于微震监测的深埋“两硬”综放面覆岩运动规律研究[J].采矿与安全工程学报,2017,34(1):74-78,102,6.基金项目
国家自然科学基金项目(51379119,51304126) （51379119,51304126）
