Mechanism and Empirical Study of Rockburst in the Adjacent Area of a Fully Mechanized Top-Coal Caving Face Based on Microseismic Technology

Monitoring and providing warnings for coal mine rockburst disasters is a worldwide problem. Several accidents have occurred in 1301 belt transport chute near 1300 fully mechanized caving face. To address this issue, an empirical study of the occurrence mechanism rockbursts adjacent area top-coal face was carried out. This paper mainly addresses following issues: (1) based on microseismic monitoring technology, distribution characteristics host-rock-supported pressure working were measured, evolution deep-well analyzed. It revealed that actually caused by superposition lateral abutment stope, stress original rock along down chute; (2) theoretical calculation model dynamic static longwall stope built, example tested. The results show peak position body outside goaf around 63 m, value 47 MPa; (3) monitoring, bolt dynamometer detection, other means are compared At same time, with help CT geophysical prospecting drilling cutting measurements, it concluded bearing influence zone (superimposed zone), which further verifies validity analysis accuracy above model. Based this, early warning system prevention measures proposed. engineering practice shows law can be dynamically obtained using provides basis accurate prediction treatment rockbursts.