China Coal Xinji Energy Co., Ltd. Banji Coal Mine

板集煤矿现开采5煤层,埋深较大。针对顺槽巷道的顶板支护盲目增加锚索支护密度,增加到一定程度后所起到的效果提升不够明显,会加速顶板岩层风化、浪费支护材料及人力、后期巷道维护工程量大等问题。采用数值模拟沿5煤顶板、5煤中间、5煤底板三种掘进方式,对巷道支护参数进行设计、验算,提出了三种支护方案。采用数值模拟进行支护效果分析,沿5煤顶板掘进时顶板变形量最小,便于后期巷道维护;当锚杆间排距900mm×900mm、顶板锚索间排距1800mm×1800mm进行支护后,巷道围岩得到有效控制,能够有效减少锚索支护材料的消耗。巷道掘进支护后对巷道布置两个测站采集数据分析验证,达到了巷道围岩得到稳定控制的效果,节约66.7%的支护锚索施工。

Banji Coal Mine is currently mining the 5th coal seam with a large burial depth. In view of the problems that after roof support of the crossheading roadway blindly increasing the density of anchor cable support to a certain extent, the improvement in the effect is not significant enough, which will accelerate the weathering of the roof rock layer, waste support materials and manpower, require a large amount of roadway maintenance work in the later stage and so on. Numerical simulation is used to design and verify the roadway support parameters along the roof, middle, and floor of the 5th coal. Three support schemes are proposed, and numerical simulation is used to analyze the support effect. The deformation amount of the roof is minimized during excavation along the roof of the 5th coal, which is convenient for later roadway maintenance; After the support is carried out when the row spacing between anchor rods is 900 mm × 900 mm and that between roof anchor cables is 1800 mm × 1800 mm, it can effectively control the roadway surrounding rock and reduce the consumption parameters of anchor cable support materials. After the excavation and support of the roadway, two survey stations are arranged for the roadway to collect data for analysis and verification, achieving stable control effect of the roadway surrounding rock and saving 66.7% of the support anchor cable construction.