粉煤灰基胶结材料充填留巷技术

Research on fly ash cementing material for filling and surrounding rock consolidation supporting technology

为了解决新安煤矿3832综三工作面因前期采用浮煤堆砌方法进行沿空留巷,造成的围岩变形严重,漏风严重,留巷效果不佳等情况,在该矿进行了粉煤灰基胶结材料巷旁充填沿空留巷技术研究与试验,并确定了留巷带支护参数、充填系统工艺流程.工程应用表明:巷道上方的下位顶板岩层和上位顶板岩层的离层得到了有效控制,采用的充填袋式充填有效阻止了巷道漏风,并预计实现区段煤柱回收效益达1 371.955 2×104元,为实现充填开采的规模化提供了工程实例,也为条件类似的矿区提供了借鉴作用.

In order to solve the problem caused by the deformation of serious surrounding rock,severe air leakage,the worse result of retaining by using float coal pile method along the empty left lane in 3832 working face of Xin’an Coal Mine,this paper studies with the test by fly ash cementing material lane beside the filling for the technology,and determines the supporting parameters and filling system for process flow.The project application cases show that the roadway at the top of the lower and upper roof strata of roof strata abscission layer has been effectively controlled,the packing bag filling roadway air leakage has been effectively prevented,and is expected to achieve section pillar recovery benefit of RMB 13 719 552,and the scale of the filling mining has provided a project example and references for similar mines.