沿空留巷围岩支护优化研究

Study on Optimization of Surrounding Rock Support of Gob Retaining Roadway

以某矿为研究背景,利用数值模拟软件,对沿空留巷围岩支护稳定性进行研究,发现距离工作面不同距离下煤帮围岩的应力出现逐步增大的趋势。同时随着滞后工作面的距离不断增加,此时在巷道煤帮、顶板与巷旁充填体的锚杆平均轴向应力分别增长约27.4%、22.4%和5.3%。根据模拟结果给出优化方案,通过验证发现方案二支护效果最佳。

Taking a mine as the research background,this paper studies the surrounding rock support stability of gob retaining roadway by using numerical simulation software,and finds that the stress of coal wall surrounding rock increases gradually at different distances from the working face.At the same time,with the increasing distance from the lagging working face,the average axial stress of bolts in roadway coal wall,roof and roadway side filling body increases by about 27.4%,22.4%and 5.3%respectively.According to the simulation results,the optimization scheme is given.Through verification,it is found that the support effect of scheme 2 is the best.