论文部分内容阅读
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.
Based on the engineering background of Huafeng Coal Mine 1612 working face and the analysis of microseismic monitoring data and on-site conditions, the understanding of multiple mine-induced earthquakes at the lower part of induced face is obtained.It also analyzes the process, microseismic characteristics, The main conclusions are as follows: The deep deformation of the roadway under deep excavation and working face is an important condition for the formation of advanced pre-detachment and its induced mine shock. The distribution of microseismic events is obviously subregional and distributed within 30 m on both sides of the lower alley It is concluded that the mine-induced earthquake is a new type of mine-quake, which is prominent for the mining of deep inclined coal seam.