胜利煤矿试采4021工作面回采期间应力分布特征分析  

Analysis of stress distribution characteristics in 4021 working face of Shengli Mine during mining

作　　者：郭亨通 Guo Hengtong(Sanyuan Shiku Mining Industry Corporation Ltd.,Shanxi Coal Transportation Group,Changzhi 047500,China)

机构地区：[1]山西煤炭运销集团三元石窟煤业有限公司,山西长治047500

出　　处：《煤炭与化工》2019年第8期19-22,共4页Coal and Chemical Industry

基　　金：国家自然科学基金(51274118)

摘　　要：根据胜利煤矿的地质条件,采用FLAC3D数值模拟软件对该矿的试采4021工作面进行综采设备选型,并对工作面及回采巷道进行数值模拟,分析工作面回采过程中,围岩应力与变形的分布特征。可以得到,在工作面推进过程中前后会形成应力集中现象,随着工作面推进应力逐渐增大,当工作面推进30m趋于稳定,在4~5MPa;工作面前方应力降低区是0~3m,应力值分布在2~3MPa;应力升高区的范围在工作面前方3~20m,应力值在3~9MPa,其中应力峰值约为9MPa,在煤壁前方5m左右;20m范围以外逐渐恢复到原岩应力;工作面前方的最大采动影响范围约是20m,故超前支撑范围应是20m。According to the geological conditions of Shengli Mine,with FLAC3D numerical simulation software,the fully mechanized mining equipment selection of 4021 working face of the mine the numerical simulation of working face were carried out,the distribution characteristics of stress and deformation of surrounding rock in the mining process were analyzed.The results were as follows:stress concentration would occur before and after working face advancing,with the increasing of working face advancing stress,when working face advancing 30 m,it tended to be stable and finally stabilized in the range of 4-5 MPa;the range of stress reduction area in front of working face was about 0~3 m,and the range of stress value about 2~3 MPa;the range of stress rise area 3~20 m norm in front of working face.Within the perimeter,the stress value was in the range of 3~9 MPa,of which the peak stress was about 9 MPa,about 5 m in front of the coal wall,and gradually recovered to the original rock stress was beyond 20 m.The maximum mining influence area in front of the working face was about 20 m,so the advance support area should be 20 m.

关 键 词：数值模拟 围岩应力 工作面应力 采动应力 

分 类 号：TD323[矿业工程—矿井建设]