Classification and Evaluation of Roadway Support Difficulty Based on Multi-factor Analysis Method
To solve the difficulties of roadway support damage and deformation in the eastern poor mine of Jinchuan No.3 mining area,the hierarchical structure analysis model of support influence factors was constructed by analytic hierarchy process(AHP).The roadway grading visualization application was realized.The analysis of the characteristics and mechanism of roadway support damage and deformation was carried out for the area with serious damage and deformation of roadway support,and a roadway support optimization scheme was proposed.And the FLAC3D was used to build a numerical model to carry out a comparative analysis of the support effect of the support plan.The results show that under the high stress environment of external horizontal tectonic stress,the distribution characteristics of plastic zone,stress field and displacement around the roadway can be effectively improved by using bolt-mesh-shotcrete support.Compared with the rebar anchor,the non-metallic anchor rod is subject to lower axial force,which the stress state of the anchor cement paste can be effectively improved,and the length of the anchor section is reduced and has a greater advantage in terms of support effect and material cost.
roadway supportcharacters of deformation and failurenumerical simulationvisualization of support classification
万方数据
维普
