【摘要】 介绍了云南会泽铅锌矿微震监测系统的组成和结构,采用微震事件的定量理论研究与现场回采情况结合的方法,圈定了地压活动区,并运用监测系统先进的地震学定量分析和可视化解释功能,对活动区应力、位移、刚度和稳定性的变化规律进行了研究。研究表明,地压活动相对集中区的变化与井下采掘活动紧密相关,较大规模岩体破坏前会出现如下特征:岩体刚度逐步增大然后又下降;应力水平先下降后又转而增大;微震发生频率及累积视在体积急剧增大等现象。为岩体破坏预测预报提供了方法及理论依据。更多还原

【Abstract】 The composition and structure of the microseismic monitoring system in Yunnan Huize Lead-zinc Mine were introduced.The ground pressure zones are defined by combining with the quantitative theoretical study on microseismic events and on-site recovery.And using the advanced seismological quantitative analysis and visual interpretation function in monitoring system,the rules of variation in stress,displacement,stiffness and stability of the activity zone were studied.It is indicated that the variation in concentrated area of the ground pressure activities has a close relationship with the underground mining activities.Before large-scale rock destruction,such features will occur as rock stiffness gradually increased and then decreased,stress level increased in turn after decreased,microseismic frequency and accumulated volume sharply increased.These can provide a method and theoretical basis for prediction of the rock mass destruction.更多还原