超前离层诱发矿震的机理及其微震特征  

Mechanism of mine earthquake induced by lead separation and its microseismic characteristics

作　　者：刘金海[1] 姜福兴[1] 张宗文[2] 刘金亮[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]新汶矿业集团公司华丰煤矿,山东泰安271413

出　　处：《湖南科技大学学报（自然科学版）》2011年第1期28-32,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(40674017;50774012);国家十一五科技支撑计划项目(2007BAK24B04);国家重点基础研究发展计划(973)项目(2010CB226803)

摘　　要：以华丰煤矿1612工作面为工程背景,通过对微震监测数据和现场情况分析,得到了超前离层诱发工作面下端多发矿震的认识.分析了超前离层诱发矿震的过程、微震特征,得到以下结论:采深大及工作面下平巷严重变形是超前离层形成及其诱发矿震的重要条件;微震事件分布具有明显的分区性,集中分布在下平巷两侧30 m范围内;该类矿震属于低位岩层断裂所致,其震级较低.最后,指出超前离层诱发的矿震是一种新的矿震类型,对于深部倾斜煤层开采,该类矿震较为突出.Taking LW 1612 in the Huafeng mine for the engineering background,it was found that the mine earthquakes occurred in the lower part of the working face are induced by the lead separation through analysis of the on-site situations and the microseismic monitoring data.The process and microseismic characteristics of the lead separation inducing mine earthquakes was analyzed,conclusions are show that great mining depth and large roadway deformation are important conditions for the lead separation formation and it inducing mine earthquakes;microseismic events are zoning,and have a concentrated distribution in the range of 30 m on two sides of the bottom gate;this type of mine earthquakes are caused by the lower strata fractures,and have a smaller magnitude.The mine earthquake induced by lead separation is a new type of mine earthquake.The type of mine earthquake becomes more and more outstanding in deep seam mining.

关 键 词：矿震 超前离层 机理 微震特征 

分 类 号：TD32[矿业工程—矿井建设]