深部综放工作面动压微震监测及控制技术研究

Research on Microseismic Monitoring and Control Technology of Dynamic Pressure in Deep Fully-Mechanized Top Coal Caving Face

针对深部复杂条件下综放工作面动压控制难,精细防冲技术与装备不足的现状,利用井下高精度微地震监测系统,结合采场覆岩空间结构理论,对开采过程中的岩层空间破裂规律、断层构造活化规律及空间应力场影响范围进行了研究,实现了三维连续动态监测及矿井冲击地压的监测和预警。结果表明,微震监测能够准确判断出工作面岩层破裂范围、煤柱稳定性及岩层运动异常区域,实现了冲击地压监测的超前预警预报。

According to the status of dynamic pressure controlling difficulty, rock burst prevention technology and equipment shortages in deep complicated conditions of fully-mechanized top coal caving face, the underground high precision rnicroseismic monitoring system combined with the overlying strata spatial structure theory, the process of mining strata spatial rupture rule, fault activation pattern and spatial stress field were researched, the 3D continuous dynamic monitoring and the monitoring and early warning of rock burst was realized. The results showed that microseismic monitoring could accurately judge the working face strata rupture range, the stability of coal pillar and rock motion abnormalities , the dynamic pressure phenomenon and scope advanced monitoring in coal mining face was realized.