基于多种判据和能量聚集的岩爆倾向性研究

Rock burst tendency research based on a variety of criteria and gathered energy

岩石具有存储高应变能的能力、围岩具有聚集高应变能的环境是岩爆发生的两个必要条件。论文以三山岛金矿深部开采为研究背景,基于室内物理力学试验,采用脆性系数、线弹性能及冲击性能评价等三种判据指标对三山岛金矿深部赋存的主要岩石的岩爆冲击倾向性进行定性分析;然后依据FLAC3D数值模拟计算深部采场围岩的弹性应变能积聚与分布特征,以及采场围岩最大线弹性能圈定范围内的总能量;并依据地震学理论,对岩爆的地震级别进行定量预测。研究成果对深部开采设计优化,控制岩爆发生、保证高效安全开采具有重要的指导意义。

There are two necessary conditions on rock burst to occur which are its strong ability of storing strain energy and the environment that gathered with high strain energy for surrounding rocks. The paper relies on the deep mining of Sanshandao gold mine as the research background, based on the indoor physical mechanical test in the room, and uses three judgement indices which are brittleness coefficient, linear elastic energy, and impact properties to do some qualitative analyses to rock burst＇s shock tendency of Sanshandao gold mine＇s deep mining; it calculates the elastic strain energy accumulation and the characteristics of distribution on the basis of FLAC^3D numerical simulation and the total energy within the scope which maximum linear elastic can be framed of surrounding rock in the stope;it does the quantitative prediction to earthquake magnitude of rock burst based on the theory of seismology. The research results has the important guiding significance to the design optimization of deep mining, the control of rock burst and ensure efficient safety mining.