“三软”煤层回采巷道支护技术研究与实践

Research and Practice on Supporting Technology of Mining Roadway in "Three Soft" Coal Seam

以梨园矿二1-21110工作面为研究对象,研究了"三软"煤层工作面回采巷道在原U型钢支护形式下巷道变形规律,并从支护结构、围岩特性等多个方面分析回采巷道破坏机理。经研究决定采用"锚网+U型钢可缩性支架"辅以锁腿锚杆对该工作面回采巷道进行支护。结果显示,该支护形式下回采巷道变形仅为原支护的40%,支护效果较好。

Taking the 1- 21110 working face as a research object, the paper studies the deformation law of mining roadway at ＂Three Soft＂ coal seam working face supported by U type steel support, analyzes the roadway failure mechanism from the aspects of support structure and the characteristics of surrounding rock, and presents the application of roadway support with anchor net,U type steel yieldable support and leg--lock anchor, which has reduced the roadway deformation to only 40 % of the original one with good support effect.