耦合注浆加固机理及围岩力学参数位移反分析
Coupled Grouting Reinforcement Mechanism and Displacement Back Analysis of Mechanical Parameters of Surrounding Rock
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摘要: 为了揭示深浅孔-高低压耦合注浆加固的作用机理，获得了王家岭煤矿12101工作面运输巷破碎围岩耦合注浆加固后的围岩参数，利用数值仿真软件COMSOL Multiphysics建立了围岩注浆加固的流固耦合模型，分析了普通注浆与耦合注浆的不同作用效果，确定了进行位移反分析的计算范围；然后，基于Mohr-Coulomb准则利用FLAC3D数值模拟软件对超前来压作用下的12101工作面运输巷相关参数进行位移反分析研究，得到了耦合注浆加固后的围岩参数；最后将反演的参数应用于预测12322工作面运输巷的位移情况，并与实际监测数据进行了对比分析，获得了较好的预测结果。Abstract: In order to reveal the mechanism of deep and shallow hole-high and low pressure coupling grouting reinforcement, and obtain the parameters of surrounding rock of the belt roadway in 12101 working face of Wangjialing Coal Mine after grouting reinforcement, the fluid-solid coupling model of surrounding rock grouting was established by numerical simulation software COMSOL Multiphysics. At the same time, the different effects of common grouting and coupling grouting are analyzed, and the calculating range of displacement back analysis was determined. Then, based on Mohr-Coulomb criterion, carry out displacement back analysis and research on related parameters of transportation roadway in 12101 working face under the action of advanced pressure, and the parameters of surrounding rock after coupling grouting reinforcement were obtained. Finally, the back-analysis parameters were applied to predict the displacement of belt roadway in 12322 working face, which were analyzed and compared with the monitoring displacement, and good prediction results were obtained.
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