【摘要】 黄山铜镍矿30~#矿体在无底柱分段崩落法开采过程中会产生较大的采空区,易诱发地表大面积突然塌陷,导致空气冲击波等地压灾害。因此建立了地压监测系统和地表塌陷分析模型,采用微震监测技术对地表塌陷过程进行监测与预警。通过微震事件的时空演化、b值分析,研究地表开裂及塌陷的发展规律,并结合现场地表塌陷实际情况,研究地表塌陷预警的前兆信息。研究表明,地表塌陷分析模型内微震事件数量突增突降以及时间间隔逐渐缩短、b值持续处于较低水平可以作为地表塌陷预警的前兆信息,为矿山的安全开采提供技术保障。更多还原

【Abstract】 In the process of sublevel caving without sill pillar mining in 30~# orebody of Huangshan coppernickel mine,a large goaf would be produced.The ground pressure disasters such as air shock wave could be caused by large area sudden collapse of ground surface.Therefore,aground pressure monitoring system and aground collapse analysis model were established.Microseismic monitoring technology is used to monitor and warn surface subsidence process.The early warning precursor information of surface cracking and collapse was studied by microseismic events space-time evolution,b value analysis and actual field situation of surface collapse.The study shows that the sudden increase and sudden drop of the number for microseismic events in the surface collapse analysis model and the gradual shortening of the time interval,b value at a low level can be used as the early warning precursor information of surface collapse,which provides technical support for mine safety production.更多还原