Floor stress evolution laws and its effect on stability of floor roadway  

作　　者：Zhang Hualei Cao Jianjun Tu Min 

机构地区：[1]School of Energy Resources and Safety,Anhui University of Science and Technology [2]State Key Laboratory Breeding Base for Mining Disaster Prevention and Control,Shandong University of Science and Technology [3]Gas Department Chongqing Branch,China Coal Research Institute

出　　处：《International Journal of Mining Science and Technology》2013年第5期631-636,共6页矿业科学技术学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51074004);the Open Project of State Key Laboratory Breeding Base for Mining Disaster Prevention and Control of Shandong University of Science and Technology of China(No.MDPC2012KF06);the Natural Science Foundation of Anhui Province of China(No.11040606M102);Young Teachers Science Foundation of Anhui University of Science&Technology of China(No.2012QNZ14)

摘　　要：According to the distribution of abutment stress in a stope,this research established the mechanical model of mining abutment pressure transmission in floor base on the theory of semi-infnite plate body in elasticity.This study takes the 762 working face of Haizi Coal Mine as a case in point,and analyzed the dynamic evolution law of seam floor stress during the mining process.With an organic combination of the mining floor stress and surrounding rock stress,the study obtained the change laws of the maximum principle stress and the minimum one for the floor roadway surrounding rock when mining the upper working face.Considering the non-constant pressure force state and the cracks revolution mechanisms of floor roadway surrounding rock,the research built the mechanical model of roadway stress.Simulation results verify the reliability of the above conclusions.Moreover,this model could provide the theoretical basis and technical support for controlling floor roadway surrounding rock.According to the distribution of abutment stress in a stope,this research established the mechanical model of mining abutment pressure transmission in floor base on the theory of semi-infnite plate body in elasticity.This study takes the 762 working face of Haizi Coal Mine as a case in point,and analyzed the dynamic evolution law of seam floor stress during the mining process.With an organic combination of the mining floor stress and surrounding rock stress,the study obtained the change laws of the maximum principle stress and the minimum one for the floor roadway surrounding rock when mining the upper working face.Considering the non-constant pressure force state and the cracks revolution mechanisms of floor roadway surrounding rock,the research built the mechanical model of roadway stress.Simulation results verify the reliability of the above conclusions.Moreover,this model could provide the theoretical basis and technical support for controlling floor roadway surrounding rock.

关 键 词：FLOOR Mining abutment pressure Floor roadway Cracks evolution mechanisms 

分 类 号：TD311[矿业工程—矿井建设]