摘要
普朗铜矿采区赋存5条贯穿的大断层,且存在众多小断层相互交错,对底部结构的稳定性影响较大。本文针对断层建立了地压监测分析模型,分析了开采过程中断层影响范围内岩体的地压活动规律。研究表明,断层区域微震事件聚集现象明显,断层揭露线上矿柱应力值变化较大,断层交叉区域的矿柱易产生应力集中现象。有针对性提出支护等措施,可以有效改善应力集中和局部岩体变形问题。
The mining area of Pulang Copper Mine have 5 large faults running through and many small faults interlacing with each other,which have great influence on the stability of bottom structure.In this paper,the ground pressure monitoring and analysis models is established for faults and their intersecting areas,and the ground pressure activity law of rock mass in the affected area of faults during mining is analyzed.The study show that the microseismic event aggregation phenomenon is obvious in the fault area,the stress value of the pillar on the fault exposing line changes greatly,and the stress concentration phenomenon is easy to occur in the pillar in the fault crossing area.Targeted support and other measures can effectively improve the problems of stress concentration and local rock mass deformation.
作者
吴明
彭张
刘强
蔡永顺
王平
WU Ming;PENG Zhang;LIU Qiang;CAI Yongshun;WANG Ping(Yunnan Diqing Nonferrous Metal Co.,Ltd.,Shangri-La 674400,China;BGRIMM Technology Group,Beijing 102628,China)
出处
《中国矿业》
2022年第S01期361-363,共3页
China Mining Magazine
关键词
自然崩落法
底部结构
断层
地压监测
natural caving method
bottom structure
fault
ground pressure monitoring
