极软岩回采巷道支护技术研究

Study on Support Technology of Extremely Soft Rock Mining Roadway

软岩巷道是巷道支护的难题之一。据具体的工程实例,分析认为巷道变形严重的主要影响因素是围岩岩性、支护整体结构和自身承载能力。基于原支护存在的问题,提出了"U型钢可缩性支架+锚网喷"的互补支护技术方案。实验结果表明,该技术取得了良好的治理效果,巷道围岩变形量明显降低,保证了巷道的正常运行。

Surrounding rock control of soft rock roadway was one of difficult problem of roadway supporting. Based on the specific engineering project, the reasons of the deformation that the surrounding properties, the whole structure of the support and the bearing capacity of the surrounding rock were analyzed, the existing problems of the primary support program was revealed, and a complementary technology that the ＂U-shape contractible frame, anchor net spray＂ controlling the surrounding rock was used. The result of the experiment showed that good effect of surrounding rock controlling was obtained and the deformation convergence was small.