空间垂直穿小窑旧巷的巷道支护技术研究

Study on Tunnel Support Technology for Roadways through Old Drift of Small Coal Mines

以西冯街煤业盘区回风大巷空间垂直过小窑旧巷的巷道支护为工程背景,通过对两巷交错区域稳定性差原因的分析,得出普通支护不能维持巷道的安全使用,需采用加强支护。根据矿压理论和锚杆支护理论,重新确定加强支护参数,巷道顶板采用锚杆+锚索+工字钢支护形式支护,两帮砌墙支护,并在现场应用中取得了良好的支护效果。

Based on the Xifengjie mine panel engineering background of tunnel implemented in air return roadway through the old drift of small coal mines in vertical direction, has analyzed general supporting structure can＇t ensure the safe of roadway and should be strengthened through the analysis of the reason for poor stability in the area of two-roadway crisscrossed.According to strata pressure and bolt supporting theory, has re-determinated supporting structure parameters and methods, including the combined supporting forms of bolt, anchor and joist steel adopting in the roof, and the brick wall supporting form used in roadway＇s sides. Besides,the form has achieved good effect in practice.