摘要
阿舍勒铜矿深部开采面临高应力水平环境,在强烈的爆破动载扰动作用下,地压灾害频繁发生。本文基于微震监测,以阿舍勒铜矿深部0 m中段2#采场岩体冒落过程为研究对象,通过分析深部开采条件下岩体受爆破动载扰动作用触发采场围岩结构失稳前后微震事件的时空演化特征、能量释放和应力-位移迁移规律,揭示动力扰动诱发采场顶板渐进式破坏的岩体破裂前兆信息与灾变演化机制。并对冒落过程中的应力和变形分布及演化的差异性进行了重点探讨,为矿山开采过程诱发松脱性地压灾害风险评估提供理论支撑。
The deep mining operations at Ashele copper mine face high-stress environments,where frequent ground pressure hazards occur under intense blasting dynamic loads.This study investigates the rock mass collapse process in the 2^(#) stope at the 0 m mid-section of the Ashele copper mine’s deep mining area using microseismic monitoring.By analyzing the spatiotemporal evolution characteristics of microseismic events,energy release patterns,and stress-displacement migration laws before and after the instability of surrounding rock structures triggered by blasting dynamic disturbances under deep mining conditions,the research reveals precursor information of rock mass fracturing and the catastrophic evolution mechanisms associated with progressive failure of stope roofs induced by dynamic disturbances.The findings provide insights into the precursory signals and disaster mechanisms of roof failure driven by blast-induced dynamic loads in high-stress deep mining scenarios.The results reveal the dynamic mechanisms of stress redistribution and deformation thresholds linked to blasting disturbances,providing theoretical support for risk assessment of loose ground pressure hazards induced by mining activities.
作者
杜万
DU Wan(China Energy Shendong Coal Group Co.,Ltd.,Yulin 719000,Shananxi,China)
出处
《中国钼业》
2025年第4期15-22,共8页
China Molybdenum Industry
基金
国家重点研发计划课题(2017YFC0602904)。
关键词
深部开采
地压灾害
微震监测
岩体冒落
风险评估
deep mining
ground pressure disaster
microseismic monitoring
rock mass collapse
risk assessment
