Study and Application of Support Difficulty Grading Method for Roadway in Jinchuan No.3 Mining Area
In order to solve the problems of lack of quantitative methods and standards for the selection of complex crushed roadway support methods,and unstable support effects,taking Jinchuan No.3 Mining Area as an example,based on the principle of catastrophic coupling,the coupling path of roadway deformation and failure was obtained,and the rock strength-stress ratio,ore rock crushing coefficient and rock mass structure grade were selected as the evaluation indicators of roadway support difficulty,and the improved LEC grading evaluation method was used to propose the roadway support difficulty grading method,and the support difficulty was divided into Ⅰ～Ⅳ grades.According to the proposed support difficulty grading method,the 1 438 m segment of the mine was quickly graded,and the corresponding support strategy was adopted according to different grading results,and the support effect was good.The study results show that the proposed roadway support difficulty grading method can quickly realize the classification of complex crushed roadway support level,and has high reliability,which provides technical support for achieving the goal of safe and economical roadway support.
graded supportcomplex roadwaysbroken rock massdeformation of surrounding rockhigh ground stress
万方数据
维普
