摘要
煤层开采深度直接影响着冲击地压的发生,通常开采深度越大,煤体的地应力则越高,煤体变形和积聚的弹性潜能也越大。应用FLAC3D数值模拟软件,建立不同开采深度下的数学模型,分析巷道掘进对冲击地压动力灾害的影响,以模拟结果为基础,应用回归分析法确定了采掘深度与巷道附近最大主应力及最大位移的线性关系,并确定了发生冲击地压的深度,公式具有较高的相关度,对矿井的冲击地压预测防治有一定的指导意义。
Coal mining depth has direct influence with rockbrust. Usually, the deeper the coal mining is, the higher the stress is, and the bigger the displacement and accumulation potential of elastic deformation is. Multiple numerical models are built to research the influence of excavation to the models＇ stress and strain based on FLAC3D numerical simulation software. According to the simulation resuits, the linear relationship between the mining depth and the maximum principal stress and the displacement near the roadway are fixed as well as the depth of rock burst. The formulas have big correlation and can make certain directive significance to the rockbrust prediction of the mine.
出处
《煤矿安全》
CAS
北大核心
2011年第6期22-25,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(50574050
50904040)
建设部科技项目(06-k1-16)
关键词
冲击地压
数值模拟
回归分析
开采深度
rock burst
numerical simulation
regression analysis
mining depth
