软岩大断面峒室支护的数值仿真分析

Numerical simulation analysis of large section soft-rock chamber support

以高家梁煤矿20307工作面机头硐室地质和开采条件为背景,分别对锚杆支护、单喷混支护和锚喷网联合支护进行数值仿真分析,结果表明:随着锚杆长度的增大,围岩变形先减小后趋于稳定;采用锚喷网联合支护时,巷道围岩变形和围岩内应力集中最小,巷道能够保持长期稳定。

Be based on geological and mining condition of head chamber of 20307 working face of Gao Jialiang mine,the bolting,single shotcreting support,and anchor combined support was analyzed by numerical simulation,the results show that,with the increase of the bolt length,the deformation of the surrounding rock decreases at first and then tends to be stable; using bolting and shotcreting with wire mesh,roadway surrounding rock deformation and surrounding rock stress concentration is the minimum,can maintain the long-term stability of roadway.