破碎围岩注浆加固数值模拟分析与工程应用

摘要

介绍了注浆技术在破碎回采煤巷中的运用.分析了注浆加固机理:注浆液通过充填、压密等作用提高破碎围岩的强度,改变围岩的破坏机理,提高围岩的稳定性.通过UDEC数值模拟和高河煤矿现场实测数据得到:模拟巷道顶底板相对最大位移量为307 mm,两帮相对位移量为229 mm;实测顶底板相对最大位移量为359mm,两帮相对位移量为262 mm,模拟与实测数据基本一致,巷道变形量得到有效控制,为矿井的安全、高效生产提供了有力的技术保障.该注浆加固技术可为破碎围岩支护提供指导意义.%The paper introduces the application of grouting reinforcement technique in cracked mining gateway,and analyzes the mechanism of grouting reinforcement.That is,the grouting slurry can increase the strength of cracked surrounding rocks,change the failure mechanism of surrounding rock and enhance the stability of surrounding rock under the action of filling and compacting.Through the UDEC numerical simulation and the measured data of Gaohe Coal Mine,it is obtained that the simulated relative maximum displacement of roadway roof and floor is 307 mm,and the simulated relative displacement of both sides is 229 mm,The measured relative maximum displacement roadway roof and floor is 359 mm,and that of both sides is 262 mm.The simulated data are basically consistent with the measured data,and the roadway deformations are effectively controlled.The research provides a technical guarantee for safety production in the working face.The grouting technique owns a guiding significance for roadway reinforcement of similar crushed surrounding rocks.