基于微震监测的千米井采场地压监测与预警技术研究

哈图金矿千米井矿区深部开采过程中,易发生冒顶、片帮等地压灾害,对后续采矿的进度与安全影响较大。本文通过微震事件时空演化规律,分析了围岩变形特征,划分出了地压活动较强的重点区域。通过微震事件累积视体积-能量指数变化规律分析岩爆和大尺度岩体破裂的预警前兆信息,根据预警信息及时采取加强支护等保护措施,取得了很好的效果。

Study on Ground Pressure Monitoring and Early Warning Technology of Kilometer Well StopeCAI Yongshun1,2,3, GUAN Xiaozhong4, WANG Haiwen4, WU Yafei5, SHI Feng1,2,3

The roof fall, spalling and other ground pressure disasters were easy to occur in the process of deep mining in kilometer well mining area of Hatu Gold Mine, which affected the progress and safety of subsequent mining. The deformation characteristic of surrounding rock was analyzed by the spatiotemporal evolution of microseismic events. The key areas with strong ground pressure activities were divided. The early warning information of rockburst and large-scale rock mass fracture was analyzed based on the variation of cumulative apparent volume and energy index of microseismic events. Some protective measures such as strengthening support were taken in time according to the early warning information, and good results were achieved.