Study on Softening Critical Load of Surrounding Rock in Deep Mine Roadway Under Different Depth Conditions
Abstract：In order to study the softening critical load of the surrounding rock in the mine roadway, a numerical model with different gen- eralized surrounding rock strength was established. With the analysis on the numerical simulation calculation, the failure features of the different generalized surrounding rock strength under the different load role were investigated. The paper had a study on the failure features of the surrounding rocks within 3 ~ 5 times wide than the mine roadway width around the seam. With the analysis on the different strength surrounding rock affected to the load mechanics response, the softening critical load of the surrounding rock was obtained. The results showed that the softening critical load of the immediate roof was 17.5 - 20. 0 MPa, the softening critical load of the seam was 12. 5 - 20.0 MPa and the softening critical load of the immediate floor was 15.0 - 17.5 MPa. The conditions of the basic roof and basic floor were same and the roof and floor within the mining depth scale were stable.
Keywords：softening critical loadsurrounding rock of mine roadwaynumerical modelresponse analysis
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 18-20,50 )