Numerical analysis for the prediction of bump prone conditions:A southern Appalachian pillar coal bump case study  

作　　者：Christopher Newman David Newman 

机构地区：[1]Appalachian Mining&Engineering,Inc.,Lexington,KY 40503,USA

出　　处：《International Journal of Mining Science and Technology》2021年第1期75-81,共7页矿业科学技术学报（英文版）

基　　金：The authors would like to acknowledge Mr. Eric Legg and Mr.Gary Hensley who were fatally injured during the coal pillar bumpthat occurred on May 12, 2014 on the No. 1 Section in the 4 EastMain of Brody No. 1 Mine. May the continued analysis of the BrodyNo. 1 Mine bring the industry closer to understanding the coal pillarbump failure mechanism such that further loss of life can beprevented.

摘　　要：Two miners were fatally injured when a pillar bump occurred during retreat mining in a southern West Virginia coal mine.The mine was operating in the Eagle seam with overmining in the No.2 Gas and Powellton seams.A coal bump is defined as a sudden and violent failure of coal caused by the release of stored strain energy in the pillar.While significant strides have been made by academia,industry,and regulatory agencies to better understand bump conditions and mitigation techniques,coal bumps represent a long standing,highly site-specific engineering problem in which the exact failure mechanism is not clearly understood.In this case history,a cut-by-cut analysis of retreat mining operations was conducted on the 4 East Main leading up to the pillar bump event.Numerical input parameters were derived from site-specific geologic information and mine geometry for the analysis of pillar stress conditions and energy release using LaModel.An overview of stress conditions in the panel was presented including a precursor event that occurred two crosscuts inby the bump site.The methodology presented in the paper for the evaluation of the fatal bump event can be used for the identification of bump prone conditions prior to development and retreat of a mining area.

关 键 词：BUMP BURST Coal Energy release rate LaModel Numerical modeling 

分 类 号：TD82[矿业工程—煤矿开采] TD79[矿业工程—矿山开采]