推采速度对工作面矿山压力及回采巷道稳定性的影响  

Influence of Mining Speed on Mine Pressure in Working Face and Stability of Mining Roadway

作　　者：任水泉 REN Shuiquan(Buertai Coal Mine,Shenhua Shendong Coal Group Co.,Ltd.,Ordos 017209,China)

机构地区：[1]神华神东煤炭集团公司布尔台煤矿,内蒙古鄂尔多斯017209

出　　处：《煤矿安全》2018年第8期234-238,共5页Safety in Coal Mines

摘　　要：以某矿回采工作面为工程背景,运用力学分析、数值模拟对不同回采速度下工作面前方垂直应力,回采巷道垂直应力的分布规律及回采巷道围岩变形特征进行研究。研究表明:回采速度较快时,工作面前方煤体内支承应力相对较大、影响范围相对小,回采巷道围岩变形量较小;回采速度较慢时,工作面前方煤体内支承应力相对较小、影响范围相对大,回采巷道围岩变形量较大。研究认为选择合适的推采速度,可以提高回采巷道稳定性、降低围岩变形量,同时亦能降低工作面前方煤体内支承压力,保障工作面生产安全。Take the mining face of a mine as the engineering background, the vertical stress in front of the working face, the vertical stress distribution of the mining roadway and the deformation characteristics of the surrounding rock of the mining roadway under different mining speed were studied by mechanical analysis and numerical simulation. The research shows that when the mining speed is high, the supporting stress in the coal in front of the working face is relatively large, the influence range is relatively small, and the deformation of the surrounding rock in the mining roadway is small; when the mining speed is slow, the supporting stress in the coal ahead of the working face is relatively small, the scope of influence is relatively large, and the deformation of surrounding rock in the mining roadway is relatively large. The study shows that choosing the appropriate mining speed can improve the stability of the mining roadway and reduce the deformation of the surrounding rock. It can also reduce the pressure in the coal body ahead of the working face and ensure the safety of the working face.

关 键 词：推进速度 数值模拟 巷道稳定性 垂直应力 围岩变形 

分 类 号：TD322.4[矿业工程—矿井建设]