摘要
煤柱是回采巷道围岩结构的一个重要组成部分,煤柱尺寸在一定程度上决定着巷道围岩的稳定性。针对崔家寨矿E12501综采工作面具体地质及开采技术条件,运用计算机数值模拟及现场实测相结合的方法,研究不同煤柱宽度时煤柱及工作面煤体应力分布规律,获得了煤柱内部应力场及演化基本规律。研究结果表明,煤柱宽度变化对围岩应力分布及结构变化特征影响显著,巷道维护状态是工作面煤层和煤柱内应力场共同作用的结果,为区段煤柱宽度的合理留设、回采巷道合理位置的选择及围岩稳定性控制提供了依据。
Coal pillar is an important component of roadway's surrounding rock structure,and the width of coal pillar determines the stability of the roadway's surrounding rock to a certain extent.The stress distribution and it's variation laws of the coal pillars with different widths were investigated according to the geological and mining technological conditions of No.12501 fully mechanized face in Cuijiazhai Mine and through the computer numerical simulation and in-situ observation,and the coal pillar' stress distribution and evolution laws were obtained.The results showed that the change of coal pillar's width had significant influence on the surrounding rock's stress distribution and the fracture characteristics,the maintenance of a roadway was the result of the common action the coal seam and the stress field in the coal pillar.So this research result provided basis for reasonably retaining sectional coal pillar,choosing reasonable place for mining roadway and controlling the stability of surrounding rock.
出处
《矿业安全与环保》
北大核心
2012年第1期20-26,6,共7页
Mining Safety & Environmental Protection
