多次动压影响下的煤柱巷道围岩控制技术

Surrounding Rock Control Technology of Coal Pillar Roadway under the Influence of MultipleDynamic Pressures

针对岳城矿煤柱巷道受叠加应力、多次动压影响、围岩控制难度大、支护效果不理想等现状,提出了高压注浆配合强力锚索补强的综合加固方案。现场矿压监测结果表明,加固后的巷道围岩保持了较好的完整性,顶板下沉量、两帮移近量都控制在设计要求之内,说明该方案能够显著提高巷帮破碎围岩的整体塑性,确保巷道安全掘进。

In view of the current situation that the coal pillar roadway of Yuecheng Mine is affected by superimposed stress,multiple dynamic pressure,the dif ficulty of surrounding rock control and the unsatisfactory supporting effect,a comprehensive strengthening scheme of high-pressure grouting combined with strong anchor cable is proposed.The field monitoring results of mine pressure show that the surrounding rock of the strengthened roadway maintains a good integrity,and the roof subsidence and the two side displacement are controlled within the design requirements,which shows that the scheme can signi ficantly improve the overall plasticity of the broken surrounding rock of the roadway side and ensure the safe driving of the roadway.