Application of High-strength Anchor Grouting Support Technology in Surrounding Rock Control of Broken Surrounding Rock Roadways
The transportation gateway excavation of 13089 working face in Shanxi A Coal Mine passed through the F16 fault,and the fractured surrounding rock generated in the affected area of the fault caused instability of the surrounding rock after roadway support.Using numerical simulation to study the strain evolution law of surrounding rock after support.The research results show that the surrounding rock of the roadway becomes unstable when the roof is compressed for 30 d,and when the roof is compressed for 40 d,the upper fault area collapses and forms a cavity along the dip direction of the fault.The technology of high-strength anchor grouting support was introduced,and the roof observation of roadway after support was carried out.The observation results show that the maximum displacement of the roof in 30 d is 60 mm,and the roadway is stable as a whole.
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