破碎煤巷围岩松动范围窥视及支护方案优化研究

Peering of Surrounding Rock Flexible Range and Supporting Scheme Optimization in Broken Coal Roadway

针对高阳煤矿S21101材料巷煤层过厚、工作面断层发育、围岩变形较大等问题,通过窥视仪测试巷道围岩松动圈范围和数值模拟软件对巷道支护方案进行了优化研究。研究结果表明,受复杂地质条件影响,巷道开挖后,围岩松动圈范围不断增大,巷道原始支护方案中锚杆长度不能满足支护要求;根据悬吊理论将巷道左帮和右帮锚杆加长至2.4m和2.2m,锚杆排距缩小为0.8m后,巷道围岩顶板下沉量和两帮移近量较原始支护条件下分别减小约42.0%和38.2%,有效控制了围岩变形。

Aiming at the great thickness of coal seam in S21101 material roadway of Gaoyang Coal Mine,and the fault development of the working face,big deformation of surrounding rock,the paper studied the optimized supporting scheme of roadway through testing the loose circle with peering instrument and numerical simulation software. The results showed that,the length of anchors could not meet the requirements as the range of loose circle was increased constantly under complicated geological conditions after roadway excavation. The roadway deformation in the roof and two sides decreased about 42. 0% and 38. 2%,after the anchors in the left and right sides of roadway were lengthened to 2. 4m and 2. 2m,and the row spacing reduced to 0. 8m based on suspension theory. The deformation of surrounding rock was effectively controlled.