深部临空巨厚坚硬顶板断裂矿震规律及成因研究

为研究特厚煤层临空巨厚坚硬顶板断裂的矿震规律，以250105工作面实际工程地质及开采特征为研究背景，采用微震监测技术对矿震事件进行了定位和统计分析，得到了矿震事件多集中在工作面采空区侧及工作面前方0~100 m。同时，采用数值模拟，分析了不同开挖阶段工作面围岩的应力分布状态，得到了工作面前方20~90 m及靠近回风巷侧顶板岩层0~40 m均为应力高度集中区域。研究结果表明，250105工作面回采期间矿震事件主要集中分布在工作面前方及工作面临空侧，厚硬顶板的破断对矿震事件的诱发起主要控制作用。

Study on law and cause of mine earthquake with huge thick and hard roof in deep space

In order to study the law of mine earthquakes of the extremely thick and hard roof fractures in the extra-thick coal seam，taking the actual engineering geology and mining characteristics of 250105 working face as the research background，the microseismic monitoring technology was used to locate and statistically analyze the mine seismic events，and obtained mine earthquake events are mostly concentrated on the side of the goaf of the working face and the range of 0~100 m in front of the working face.At the same time，numerical simulation was used to analyze the stress distribution state of the surrounding rock at different excavation stages，and it was obtained that the 20~90 m range in front of the working face and the 0~40 m of the roof rock near the side of the return airflow trough were all areas of high stress concentration.The results showed that during the stoping period of 250105 working face，the mine seismic events are mainly distributed in front of the working face and adjacent to the working face.The breaking of the thick and hard roof plays a major role in the induction of mine seismic events.