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Metal Mine ›› 2012, Vol. 41 ›› Issue (10): 29-32.

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Risk Analysis and Control Measures for Roof Dynamic Pressure of Roadway Excavated in Coal Pillar near the Goaf

Jin Jiancheng1,Yu Guiliang1,Dou Linming2,Wang Jie2,Li Ning2   

  1. 1.Yanbei Coal Mine of Huating Coal Industry Group;2.State Key Laboratory of Coal Resources and Safe Mining
  • Online:2012-10-15 Published:2012-11-08

Abstract: This paper focus on 20 meters coal pillars between working face upper 250205 tail entry and working face upper 250204 in mining area 2502 of Yanbei Coal Mine which will induce the danger of rock burst and roadway tunneling and maintaining difficulties. The simulation is made to analyze stress cloud images and bearing pressure curve before and after pressure relief with different coal pillar size. Finally,the roadway layout of working face 250204 and the rational coal pillar size are confirmed,realizing the safety of roadway tunneling,which offer a reference for the layout of mining area and the arrangement of coal pillar in the future.  

Key words: Coal pillar near the goaf, Roadway arrangement, Risk analysis, Control measures, Coal pillar size