工作面专用回风巷位置优化及围岩控制

Location Optimization of Special Air-return Way in Working Face and Control of Its Surrounding Rock

为避免某矿1231(1)工作面采动对工作面专用回风巷的影响,采用数值模拟方法分析了工作面回采期间辅助运输巷底板应力分布规律,对工作面专用回风巷的空间位置进行了合理优化,最终确定1231(1)工作面专用回风巷与上部辅助运输巷平距为8 m,垂距为25 m。根据专用回风巷在回采前后的变形破坏特征,提出了巷道围岩不对称支护方案。现场实践表明:巷道支护效果良好,保证了采动影响期间工作面专用回风巷的围岩稳定。

In order to avoid the influence of the coal mining on the special air- return way in 1231（ 1） working face in a mine,analysis was made by numerical simulation on the floor stress distribution laws in the auxiliary haulage gate during coal mining of the working face,the spatial position of the special air-return way in the face was reasonably optimized and finally it was determined that the horizontal distance between the special air-return way of the face and the upper auxiliary haulage gate was8 m and the vertical distance between them was 25 m. The asymmetry support scheme for the surrounding rock of the special airreturn way was proposed according to its deformation characteristics before and after coal mining. The field practice showed that the support effect of the special air-return way was good and its surrounding rock can maintain stable during the mining influence.