寺河矿叠加应力区复用巷道注浆加固技术研究

Research on Grouting Reinforcement Technology for Reusable Roadway in Sihe Mine Superimposed Stress Area

为解决寺河矿复用巷道受重复采动影响严重变形、破坏问题,通过钻孔窥视、现场观测、数值模拟等手段探究了巷道变形破坏规律,选取合理注浆时机及范围,设计了注浆加固方案。工程实践结果表明:经过注浆加固后,围岩承载能力得到提高,巷道变形速率从11 mm/d减至2 mm/d左右,满足巷道安全服务需求。

In order to solve the problem of serious deformation and damage of reused roadway affected by repeated mining in Sihe Mine,the deformation and failure law of roadway was explored by means of borehole peeping,field observation and numerical simulation.The reasonable grouting opportunity and range were selected and the grouting reinforcement scheme was designed.The engineering practice results show that:after grouting reinforcement,the bearing capacity of surrounding rock is improved,and the deformation rate of roadway is reduced from 11 mm/d to 2 mm/d,which can meet the needs of roadway safety service.