采动作用下孔隙水压力对深埋软岩巷道稳定性的影响  

Effect of Pore Water Pressure on Stability of Deep Soft Rock Roadway Under Mining

作　　者：王云平[1] 赵德深[1,2] 郭东亮[1] 

机构地区：[1]大连大学辽宁省复杂结构体系灾害预测与防治重点实验室,辽宁大连116622 [2]大连大学辽宁省高校重点岩土与结构工程与技术研究中心,辽宁大连116622

出　　处：《煤矿安全》2016年第2期200-203,207,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51274051;51374045)

摘　　要：为研究软岩巷道围岩在深部高应力环境下高孔隙水压力对其稳定性的影响规律,结合大平煤矿的回采工作面S2S9的工程地质资料,建立了二维有限元模型模拟研究了煤层开采过程中高孔隙水压力对深部软岩巷道围岩稳定性的影响及孔隙水压力分布规律。研究结果表明:随着采空区面积的增大,工作面和开切眼附近的高孔隙水压力区域逐渐扩大,导致工作面顶板突水危险区域扩大;孔隙水压力呈现两头高,中间低的趋势,与工作面上方覆岩"马鞍型"的破坏区域是相符的。In order to research the effect laws of pore water pressure on stability of surrounding rock of roadway in soft rocks under the deep and high stress environment, a two-dimensional finite element model is established to simulate the effect of pore water pressure on stability of surrounding rock of soft rocks roadway and the distribution laws of water pressure during coal mining, according to the engineering geological data of S2S9 of working face of Daping Coal Mine. Simulation results show that the region of high pore water pressure near the working surface and open-off cut is gradually enlarged, along with the increase of goaf area. So that, the dangerous area of the water burst of roof working face is enlarged; the pore water pressure presents the trend of high at both ends and low in the middle, which accords with the saddle type damage area above the working surface.

关 键 词：高孔隙水压力 深部开采 围岩稳定性 开切眼 软岩巷道 数值模拟 围岩控制 

分 类 号：TD322.4[矿业工程—矿井建设]