基于微震监测的高强度开采工作面围岩响应规律

将微震监测系统引入西部高强度开采的典型矿区——小纪汗煤矿,实现了整个监测区域的"空间"监测,更为全面地捕捉围岩内部破裂信息,基于微震监测数据分析了煤矿工作面的矿压显现规律、岩层运动规律和围岩应力变形规律.结果表明:随着11203工作面的不断开采,微震事件的演化呈周期性变化,与工作面矿压显现规律密切相关,且周期来压平均步距为23 m.划分得到了工作面"三带"的范围及工作面开采扰动影响范围,为工作面的支护设计和灾害防治工作提供数据支撑.

Surrounding Rock Response Pattern of Working Face with High-Intensity Mining Based on Microseismic Monitoring

IMS microseismic monitoring system was employed in Xiaojihan coal mine， a typical high-intensity mining mine in Western China. The spatial monitoring of the whole monitoring area was realized and more comprehensive information of surrounding rock failure was captured. The mine pressure behavior， strata movement， and the stress and deformation around the surrounding rock mass were analyzed based on microseismic monitoring. The results showed that the microseismic events evolved periodically with the continuous mining of 11203 working face， which is closely related to the mining pressure behavior in the working face， and the average periodic weighting length is 23m. The height of “three zones” and the influence range of mining disturbance in the working face could provide help for support design and disaster prevention.