Research on synergistic technology of surrounding rock control of large cross-section roadway in thick coal seam
In view of the problems such as poor surrounding rock stability,difficult support and difficult roadway deformation control during the mining of thick coal seam,based on the background of 14321 fully mechanized mining face in Gubei Coal Mine and the comprehensive analysis of the geo-logical conditions of the face and the stability of surrounding rock,the combined support technology i-dea of"resin bolt+anchor cable+rhomboid network+channel steel beam+M5 steel belt"was pro-posed.The influence of different support schemes on the deformation of roadway surrounding rock was studied by theoretical analysis and numerical simulation,and the optimal support scheme was fi-nally established.Site monitoring results show that:after the combined supporting,the maximum displacement of roadway roof is 41 mm,and the maximum deformation of the roadway two sides is 50 mm,which confirms the effectiveness and rationality of the support scheme,and provides a technical reference for future roadway support under similar conditions.
combined supportingsurrounding rock controllarge cross-sectionnumerical simulationsite monitoring
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