高应力破碎围岩巷道控制机理及支护技术

Control mechanism and supporting technology of roadway in high stress fractured surrounding rock

为解决高应力破碎围岩巷道围岩支护效果差、变形破坏严重等问题,以东峡煤矿37221-2回风巷为背景,通过现场勘察、理论分析和现场试验相结合的方法,研究了高应力破碎围岩巷道的变形破坏特征和控制原理。基于原支护方案及分析成果,提出了“注浆管浅部注浆+锚杆+注浆锚索+钢筋网”的联合支护方案。现场工业试验结果表明,采用优化支护后顶底板最大移近量和两帮最大收敛量同原支护方案相比,分别减少了约77%、82%,围岩的整体性和稳定性良好。该研究可为高应力破碎围岩巷道、围岩控制提供参考和技术支持。

In order to solve the problems of poor surrounding rock supporting and serious deformation damage in high stress fractured surrounding rock roadway,the deformation damage characteristics and control principle of high stress fractured surrounding rock roadway were studied by combining field investigation,theoretical analysis and field test with the background of No.37221-2 return air roadway in Dongxia Coal Mine.Based on the original supporting scheme and the analysis results,the joint supporting scheme of"grouting pipe shallow grouting+anchor rods+grouting anchor ropes+reinforcing mesh"was proposed.The results of field industrial test showed that the maximal displacement of the roof and floor and the maximal convergence of the two gangs were reduced by about 77%and 82%respectively compared with the original supporting scheme,and the integrity and stability of the surrounding rock were good.This study can provide reference and technical support for controlling the surrounding rock of high stress fractured surrounding rock roadways.