【摘要】 黄山铜镍矿30~#矿体开采过程中,上覆采空区顶板易大范围冒落并贯通地表。为掌握地表开裂及上覆采空区顶板冒落规律,建立并优化微震监测系统对其进行有效监测。分析可知,2019年5—6月地表附近微震事件出现3次突增现象,顶板破裂范围逐渐减少。微震事件有向32~#塌陷区及其东部发展趋势,地表与顶板之间有逐渐贯通趋势。基于微震事件分析地表岩体应力特征,为矿山的安全生产提供了技术保障。更多还原

【Abstract】 The roof of the overlying goaf was easy to fall in a wide range and penetrate the surface during the mining process of No.30 orebody in Huangshan Copper-Nickel Mine.A microseismic monitoring system was established and optimized to effectively monitor the regularity of surface cracking and roof caving in overlying goaf.Results indicated that three sudden increases in microseismic events occurred near the surface and the range of roof rupture decreased gradually from May to June 2019.The microseismic events tended to 32~#subsidence area and its eastern development,and there was a penetrating trend between the surface and the roof gradually.The stress characteristic of surface rock mass was analyzed based on microseismic events,which can provide technical guarantee for safe production of mines.更多还原