陡倾双塌陷坑下高阶段采场结构参数优化

摘要

In order to ensure safe and efficient mining ,based on Wulan polymetallic mining technical conditions ,combined with high stage the upper stope dipping double sinkhole present situation ,under the certain condition of needle safety thickness ,to 945 m in the middle for integrated optimization of stope structure parameters is analyzed .Using FLAC3D three-dimensional numerical simulation software ,using the aspect ratio beam slab calculated method and the ratio of span method principle ,in the 945 m middle mining area under the condition of safe thickness of roof is 15 m ,with three different stope structure parameters of room and pillar mining and filling ,and after the excavation of the stope for the comprehensive comparison and analysis of stress ,deformation and the plastic area ,through the analysis results show that the safe thickness of roof is 15 m cases ,reasonable room and pillar size is 15 m .%为了保证矿山安全高效开采,基于乌兰多金属矿开采技术条件,结合高阶段采场上部陡倾双塌陷坑现状,在一定顶柱安全厚度条件下,对945 m中段采场结构参数进行综合优化分析.运用FLAC3D三维数值模拟软件,利用长宽比梁板法和比例跨度法原理计算得出,在945 m中段开采区域顶板安全厚度为15 m的条件下,对三种不同采场结构参数的矿房与矿柱进行开采和充填,并对开挖后的采场进行应力、变形及塑性区的综合对比分析,通过分析结果表明,在顶板安全厚度为15 m情况下,合理的矿房和矿柱尺寸均为15 m.