急倾斜煤层巷道围岩变形破坏机理及支护研究

Researches on Roadway Surrounding Rock Deformation and Failure Mechanism and Supporting System in Steeply Inclined Seam

急倾斜煤层巷道大多采用单一的支护体系,变形破坏极为严重。为了找出适合急倾斜煤层巷道的支护体系,对急倾斜巷道围岩变形破坏特征进行了深入的分析。以赵家坝煤矿3964运输平巷作为研究对象,借助岩石点荷载试验、围岩松动圈测试和数值模拟软件,对该巷道围岩力学性质、围岩松动范围、应力分布、变形情况分别进行研究,得出急倾斜煤层巷道围岩变形破坏机理,提出了锚网索钢带+注浆的支护体系。工程实践表明,该支护体系大大增强了急倾斜煤层巷道的稳定性,为急倾斜煤层巷道支护提供了科学依据以及实践经验。

Roadway deformation was heavily damaged for the single supporting system adopted in the Steeply inclined seam. In order to find the suitable supporting system for steeply inclined seam, roadway surrounding rock deformation and failure characteristics were analyzed in the Steeply inclined seam. Taking Zhaojiaba 3964 coal haulage drift as the object of study, roadway surrounding rock loose range, mechanical property, stress distribution, deformation were studied under the help of point load test of rock, rock loose circle test and numerical simulation software. The roadway surrounding rock deformation and destruction mechanism in the steeply inclined seam are obtained,with the cable an- chor steel and grouting support system put forward. Engineering practice shows that the stability of roadway in steep coal seam can be greatly enhanced by the support system. Scientific basis and practical experience are provided for supporting system of the roadway in steeply inclined