Coupled Grouting Reinforcement Mechanism and Displacement Back Analysis of Mechanical Parameters of Surrounding Rock

XU Changyu; HAN Lijun; TIAN Maolin; WANG Yajie

Safety in Coal Mines > 2020 > 51(11): 155-160.

XU Changyu, HAN Lijun, TIAN Maolin, WANG Yajie. Coupled Grouting Reinforcement Mechanism and Displacement Back Analysis of Mechanical Parameters of Surrounding Rock[J]. Safety in Coal Mines, 2020, 51(11): 155-160.

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Coupled Grouting Reinforcement Mechanism and Displacement Back Analysis of Mechanical Parameters of Surrounding Rock

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Published Date: November 19, 2020

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Abstract

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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Coupled Grouting Reinforcement Mechanism and Displacement Back Analysis of Mechanical Parameters of Surrounding Rock

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