新元矿9104工作面进风巷复合顶板围岩控制技术研究与应用

Research and application of composite top plate rock control technology in the intake airflow roadwayof Xinyuan Mine 9104 working face

为有效控制9104工作面进风巷复合顶板巷道围岩的稳定,采用FLAC3D数值模拟对巷道掘进和工作面回采期间围岩应力分布规律进行分析,得出巷道掘进期间直接顶0~3 m岩层会出现塑性破坏,回采时超前支承压力峰值约在前方40 m的位置处,基于数值模拟结果,确定巷道采用高强度高预应力的支护方式,并设计支护方案。结果表明,高强度高预应力支护方案实施后,掘进期间顶底板及两帮的最大变形量分别为43 mm和83 mm,保障了巷道围岩的稳定。

In order to effectively control the stability of the surrounding rocks of the 9104 intake airflow roadway,FLAC3D numerical simulation was used to analyze the stress distribution patterns of the surrounding rocks during mining and recovery mining of the working face.The results showed that the maximum deformation of the top and bottom plates and the two sides during the mining were 43 mm and 83 mm respectively,after the implementation of the high-strength high pre-stress support scheme,which ensured the stability of the surrounding rock of the tunnel.