Research and Application of Supporting Stress Technology in Deep High Stress Broken Surrounding Rock Roadway
To solve problems such as large deformation of surrounding rocks,poor stability and difficulty in supporting in a 975 m horizontal roadway,Sanjiaohe Coal Mine conducts researches into the rock property of rock formation,structure and crack distributions in the roadway roof using the rock detecting instrument and laboratory mechanical experiments.Based on the original bolt-shotcrete support,the secondary support uses high resistance,fully-closed and polygonal steel brackets to support the roadway.And through the establishment of numerical model,plastic zone sizes of the surrounding rocks,before and after using the new steel brackets,are compared to determine the rationality of the support mode of new brackets.At the same time,results of site industrial test shows that after using the new support,the roadway deformation has been controlled in about 50 mm.And it achieves good technical and economic benefits in the engineering applications.The results have certain instructive meaning to support the design of the similar roadway.
deep mine roadwayroadway supportvalue simulationsurrounding rock deformation
万方数据
维普
