摘要
急倾斜煤层赋存条件复杂,开采难度大.以实际工程为背景,通过相似材料模拟实验对浅埋急倾斜特厚煤层水平开采进行研究,分析了沿煤层倾向剖面采场围岩的运动变化规律和支承压力分布特点.水平分层放顶煤开采过程中上覆岩层出现循环破坏的空洞,其顶板岩层内的位移及其破坏位于偏上山方向区域,顶板岩层的影响范围可扩大至煤层法线上方90 m以外区域;采场应力集中区域主要分布干顶板岩层内.研究结论可为同类矿井的开采设计与安全生产提供理论依据.
Steeply inclined seam is difficult to mine for its complex occurrence. Based on actual project, this paper analyzes the motion law of surrounding - rock movement along the inclined seam dip section and distribution of abutment pressure, according to similar material simulation experiment. Results show that cycling loop hole appears in overlying strata during level mining progress of shallow deeply seam; destruction and displacement of rock roof are located entirely in seam normal inclined to raising advance, and its impact on roof strata can expand to 90m and outside inclined to seam normal ; stress of slope is mainly distributed in roof rock, especially the bottom area. The research can provide a theoretical basis for the mining design and safe production.
出处
《矿业工程研究》
2015年第1期34-37,共4页
Mineral Engineering Research
关键词
急倾斜特厚煤层
水平分层
相似材料模拟
围岩运动
steep thick seam
horizontal slice
Similar material simulation
surrounding- rock movement
