薄煤层条件下沿空留巷优化研究

Study of Gob-side Entry Technology Optimization under Condition of Thin Coal Seam

针对沿空留巷施工过程中出现的围岩变形量过大等问题,通过对沿空留巷围岩变形的影响因素进行分析,认为留巷宽度过大是引起围岩变形的主要原因。基于此,提出了减小留巷宽度的优化方案并进行了现场工业性试验。试验结果表明,在围岩变形进入稳定阶段后,顶底板移近量降低了58%,两帮移近量降低了60%,有效地控制了巷道围岩变形。

According to the problems of large surrounding rock deformation at the gob-side entry, through analysis of influencing factors of surrounding rock deformation of gob-side entry, the large deformation of surrounding rocks of gob-side entry relates primarily to the width of gob-side entry. Therefore, to control its deformation, the program of reducing the width of gob-side entry is optimized. The results show that the roof to floor convergence dropped by 58% and two sides convergence dropped by 60% after surrounding rock deformation into a stable phase, the deformation of surrounding rock is effectively controlled.