摘要
针对玲珑矿塌陷区主运输巷道变形失稳问题,采用FLAC3D数值模拟软件进行了巷道变形破坏与拱桥锚注加固机理的非线性固流耦合模拟分析,论述了拱桥锚注加固技术的工艺参数与流程,并对巷道加固效果进行了现场实测分析。研究结果表明:保护矿柱被盗采后导致巷道围岩出现了大面积的拉伸与剪切破坏区,通过对巷道变形破坏区进行拱桥锚注加固,在围岩体中形成了一个桥式的承载结构,提高了围岩的自承能力,通过对加固后巷道断面收敛情况进行实测分析,各断面观测的变形值均较小,最大变形值仅为6.47mm,加固效果能够很好的满足巷道运输要求。
Aiming at the deformation instability of main haulage roadway in Linglong mine,FLAC3 Dnumerical simulation is used for the nonlinear solid-liquid coupling simulation of roadway deformation and arch bolt-grouting reinforcement mechanism.The arch bolt-grouting reinforcement parameters and process are discussed.The reinforcement effect of roadway is analyzed in field.The research results show that,the protection pillar stolen postharvest leads to a large area of roadway surrounding rock tensile and shear damage zone.Through the bolt-grouting reinforcement,an arch bridge bearing structure is formed in the deformation area,which improves the bearing capacity of surrounding rock.According to the measured convergence conditions of roadway,the reinforced deformation of each section is small,maximum is6.47 mm,the reinforcement can meet the roadway transportation demands.
出处
《煤炭工程》
北大核心
2016年第4期43-45,共3页
Coal Engineering
关键词
巷道塌陷区
拱桥锚注加固
数值模拟
声发射
roadway subsidence area
arch bolt-grouting reinforcement technology
numerical simulation
acoustic emission
