基于微震监测技术的矿山高应力区采动研究

 冬瓜山铜矿是目前国内开采最深的金属矿山之一，岩石具有典型的岩爆倾向性，最大应力为38 MPa，为控制岩爆的发生及制定高应力区采矿的战略，2005年矿山引进南非ISS国际公司的微震监测系统，实现对采矿引起的岩体应力、应变状态的实时监测。简单介绍冬瓜山矿微震监测系统的布置；基于一段时间内监测到的有效事件，对井下首采区地震事件的时间与空间分布进行研究；利用可视化工具JDI对事件的相对集中区域进行圈定，并与井下生产活动相结合，分析原因；还提出对井下工程岩体危险识别的手段，并用实际发生的事件验证；综合研究成果，制定以微震监测技术为基础的高应力区采动分析的工作程序，为目前矿山的安全生产提供依据。

RESEARCH OF MINING BASED ON MICROSEISMIC MONITORING TECHNOLOGY IN HIGH-STRESS AREA

Dongguashan Copper Mine is one of the deepest metal mines with rockburst proneness in China at present,and the highest stress is 38 MPa. In order to control rockburst and establishing mining strategy in high stress area,the Dongguashan Copper Mine has installed an ISSI miroseismic monitoring system in 2005. The system can timely monitor change of the state of stress or strain in rockmass induced by mining. The layout of the seismic monitoring system in Dongguashan Copper Mine is descried. Then the time-spatial distribution of seismic events in a period of time is analyzed. By using visual tools of JDI the relative convergence area of seismic events in initial mining district is delineated combining with the causes according to practical mining underground. Also,some methods of identifying dangerous of rock mass project in underground are proposed,which is verified by the actual events. According to research results,the working procedure to analysis of rock mass induced by mining based on microseismic monitoring technology in high-stress area is developed,which can provide a basis for safety of mine production.