结合充填开采留巷的实际情况,对超高水材料充填开采留巷围岩运动及控制机理进行了分析。采用数值模拟采空区充填率为70%、80%、90%的留巷围岩活动规律,得出随着采空区充填率的提高,充填开采留巷围岩应力逐渐降低、围岩变形逐渐减小。针对试验工作面的实际情况进行了包式充填沿空留巷的工程实践,现场实测超高水材料充填开采留巷顶底板移近量在60mm以内、两帮移近量在30mm以内,巷旁包式充填体的支承压力小于2.5MPa,能够实现长时间使用的要求,可为类似地质条件下的超高水充填留巷提供技术参考。
Analysis of rules and control mechanism of surrouding rock movement of backfill mining and entry retaining with super-high-water material is made combined with the actual application situation of this technology. Numerical simulation to study the rules of the surrounding rock movement with goaf filling rate of 70%,80% and 90%,it shows the stress and deformation of surrounding rock decreases with the increase of goaf filling rate. According to the application of super-highwater material bag filling in experimental working face,the roof and floor convergence of roadway is within 60 mm,and the two-side convergence is within 30 mm,the abutment pressure of bag filling body is less than 2. 5MPa,which meet the requirements of long time utilization.