大埋深高应力软岩巷道围岩支护技术研究

The Research of Depth High Stress Soft Rock Roadway Supporting

摘要: 以深部软岩巷道为研究背景，对某矿西盘区底板措施巷巷道表面位移进行监测，监测结果表明巷道围岩出现非线性大变形、锚索破断及支架扭曲变形等现象。利用FLAC3D对巷道围岩进行数值模拟，得出软岩巷道围岩变形属于给定变形，巷道支护体不仅要提供足够的支护强度，还必须适应软岩巷道大变形，据此提出可接长锚杆协调支护技术，使稳定后顶板下沉量在200~250 mm之间，两帮相对移近量在200 mm上下，得到预期的支护效果。

Abstract: In this study, the deep soft rock roadway was as the research background. The roadway of the mine’s west bottom panel measure’s lane surface displacement was monitored. Data show that the rock roadway deformation is nonlinear large deformation of surrounding rock deformation and widespread cable breakage and other support bracket distorted body damage phenomena. Using FLAC3D software to simulate on the rock roadway, we obtained that the deformation of soft rock roadway belonged to given deformation. Roadway body not only has to provide sufficient supporting strength, but also must adapt to large deformation of soft rock roadway. Hereby, proposing the coordinated supporting technology with docking bolt, making the roof sinkage between 200 and 250 mm when it is stable and the relative two sides moving quantity in 200 mm up and down, getting the expected supporting effect.