软岩巷道底板变形机理及控制研究

Study on Deformation Mechanism and Control of Soft Rock Roadway Floor

为解决大阳煤矿东翼运输巷道底板变形严重情况,通过对原支护条件下底板变形机理的分析,决定采用“高强混凝土反底拱+中空注浆锚索+拱形槽钢”联合支护的方法进行底板控制。结果表明:采用该方法后,底板变形量相对原支护条件下降85%左右,对于底臌治理效果显著,同时对于控制两帮的稳定性也具有一定积极作用。

In order to solve the serious deformation of the floor of the eastern transport roadway in Dayang Coal Mine,through the analysis of the deformation mechanism of the floor under the original supporting conditions,the method of"high-strength concrete inverted arch+hollow grouting anchor cable+arch channel steel"combined support is adopted to control the floor.The results show that the floor deformation decreases by about 85%compared with the original supporting conditions,which has a significant effect on the treatment of floor heave and a positive role in controlling the stability of both sides.