Numerical simulation of roof cavings in several Kuzbass mines using finite-difference continuum damage mechanics approach  

作　　者：Mikhail Eremin Gabriel Esterhuizen Igor Smolin 

机构地区：[1]Institute of Strength Physics and Materials Science,Siberian Branch,Russian Academy of Sciences,Tomsk 634055,Russian Federation [2]National Institute for Occupational Safety and Health,Pittsburgh,PA 15236,USA [3]National Research Tomsk State University,Tomsk 634050,Russian Federation

出　　处：《International Journal of Mining Science and Technology》2020年第2期157-166,共10页矿业科学技术学报（英文版）

基　　金：This work was supported by the Russian Science Foundation,under grant 19-71-00083.Authors also would like to express gratitude to an anonymous reviewer whose comments helped to improve the quality of paper,and editors of the journal.

摘　　要：An essential stage of mine design is an estimation of the steps of the first and periodic roof caving in longwall mines.Generally,this is carried out using the field experience and can be much enhanced by numerical simulation.In this work,the finite-difference method was applied coupled with the continuum damage mechanics(CDM)approach to simulate the stress-strain evolution of the rock mass with the underground opening during coal extraction.The steps and stages of roof caving were estimated relying on the numerical simulation data,and they were compared with the field data from several operating mines in the south of the Kuznetsk Basin,Russia.The dependence of the first roof caving step in simulation linearly correlates with field data.The results correspond to the actual roofs of longwall panels of the flat-dipping coal seams and the average rate of face advancement is approximately 5 m/day.

关 键 词：LONGWALL mining Rock mass Underground OPENINGS ROOF CAVING ABUTMENT pressure Numerical simulation 

分 类 号：TD823.4[矿业工程—煤矿开采]