煤矿安全2025，Vol.56Issue(4)：120-126,7.DOI:10.13347/j.cnki.mkaq.20231643
水力劈裂作用下煤岩注浆加固力学特性研究
Study on mechanical properties of coal rock grouting reinforcement under hydraulic fracturing
摘要
Abstract
In order to solve the problems of instability and disturbance collapse of roadway surrounding rock in the process of coal mining,a splitting grouting reinforcement method is proposed.The splitting coal samples were grouted with cement-based slurry and epoxy resin with different water-cement ratios,and uniaxial compression experiments were carried out.Combined with acoustic emission and VIC3D monitoring system,the compressive strength and macroscopic failure characteristics of coal samples reinforced with different grouting materials were discussed.The experimental results show that:the compressive strength of grouting reinforce-ment increases with the decrease of water-cement ratio,and the strength of epoxy resin to the consolidation body is significantly im-proved,but the reinforcement effect is basically the same as that when the water-cement ratio is 0.6;in the aspect of the failure char-acteristics of the reinforced body,the stress concentration first occurs at the joints of the coal sample,with the extension of the load-ing time,the cracks are finally destroyed after initiation,expansion and penetration.The failure positions all occur in the non-rein-forced zone,indicating that the splitting grouting reinforcement can improve the integrity of the coal rock.关键词
断层带/注浆劈裂/注浆加固/环氧树脂/声发射/VIC3DKey words
fault zone/grouting splitting/grouting reinforcement/epoxy resin/sound emission/VIC3D分类
矿业与冶金引用本文复制引用
张嘉凡,贡毅恒,王赋宇,覃祥瑞,张慧梅..水力劈裂作用下煤岩注浆加固力学特性研究[J].煤矿安全,2025,56(4):120-126,7.基金项目
国家自然科学基金资助项目(12172280,12072259) （12172280,12072259）
陕西省自然科学基金重点资助项目(2020JZ-53). （2020JZ-53）
