充填体对综放沿空留巷围岩应力分布影响研究

Effect of Backfill on Distribution of Stress of Surrounding Rock for Retained Roadway in Fully-mechanized Caving Face

在巷道断面、支护条件、充填体材料、端头不放顶煤长度均不变的条件下,充填体宽度成为影响留巷效果的主要因素,选择合理的充填体宽度可以得到良好留巷效果。以潞安集团王庄矿7101运输顺槽为工程背景,采用相似材料模拟实验,对围岩应力、岩块活动规律及巷道变形进行分析研究,得出了充填体宽度>2.5 m时,充填体的强度能满足维持巷道围岩稳定性的要求,取得了良好留巷效果。

The width of the backfill will be the primary factor which influences the effect of retaining roadway in the condition of no change of section size of roadway,condition of support,backfill material and the length of no caving coal.The effect of retained roadway would be better if a more appropriate width of backfill is chosen,similar simulation test was conducted to research the stress of the surrounding rocks and its activity laws and the deformation of roadway,which took the return airway7101 in Wangzhuang mine of Lu′ an group as the engineering background.The adequate width of backfill is more than 2.5 m so as to keep the backfill steady and as a result a proper effect of roadway is obtained.