Mechanism analysis and application of grouting anchor cable reinforcement in roadway with broken surrounding rock
Guo Chaohua
分析山西新景矿受采空区动压影响掘进工作面原有支护方式,阐述煤柱受到应力破坏原因和注浆锚索支护方式的加固机理,优化注浆锚索施工工艺加固方案,确定巷道顶板、回采煤柱侧和实体煤侧的不同锚索支护参数。应用结果表明,两帮移近量降低至175.9 mm,移近量降幅达到72.7%;顶板下沉量减小至77.66 mm,降幅达到79.3%;帮锚索拉拔力试验实测数值均超过150 kN的标准要求,注浆锚索加固方案取得了显著效果。
Through the analysis of the original support mode of the driving face affected by the dynamic pressure of the goaf of Shanxi Xinjing Mine, the reason of the stress damage of the coal pillar and the reinforcement mechanism of the grouting anchor cable support mode were expounded. The grouting anchor cable construction technology was used to optimize the reinforcement scheme, and the different anchor cable support parameters of the roadway roof, the side of the coal pillar and the side of the solid coal were determined. The application results showed that the convergence of the two sides was reduced to 175.9 mm, and the convergence was reduced by 72.7%. The roof subsidence decreased to 77.66 mm, with a decrease of 79.3%. The measured values of the pull-out force test of the anchor cable exceeded the standard requirement of 150 kN, and the grouting anchor cable reinforcement scheme had achieved remarkable results.
coal pillar protection;roof separation layer;grouting anchor cable;support scheme
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会