上覆斜交煤柱对回采的影响及防治研究  

Research on the influence of overlying oblique-crossing coal pillar on mining and its prevention

作　　者：高奎英 冯志忠 徐朝 苏海飞 GAO Kuiying;FENG Zhizhong;XU Zhao;SU Haifei(Daliuta Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719315,China)

机构地区：[1]国能神东煤炭集团有限责任公司大柳塔煤矿,陕西省榆林市719315

出　　处：《中国煤炭》2023年第S02期260-264,共5页China Coal

摘　　要：针对大柳塔煤矿22号煤层22206工作面斜交布置在12号煤层残留煤柱下方,在煤柱集中应力和本工作面采动应力影响下,使得工作面巷道变形严重,维护极其困难。通过理论分析和FLAC^(3D)数值计算对上方斜交煤柱集中应力与本工作面采动应力耦合动态应力场时空演化进行了研究,得出巷道与煤柱不同空间关系下应力场对巷道变形的影响规律,上述结果与22206工作面进风巷道变形的观测数据相吻合。The 22206 working face of the No.22 coal seam in Daliuta Coal Mine is diagonally arranged below the residual coal pillars of No.12 coal seam.Under the influence of concentrated stress of the coal pillar and the mining stress of this working face,the deformation of the working face roadway is severe and the maintenance is extremely difficult.Through theoretical analysis and FLAC^(3D)numerical calculation,the spatiotemporal evolution of the coupled dynamic stress field between the concentrated stress of the upper oblique-crossing coal pillar and the mining stress of this working face was analyzed,and the influence of the stress field on the deformation of the tunnel under different spatial relationships between the roadway and the coal pillar was obtained.The above results are consistent with the observation data of the deformation of the intake airway of the 22206 working face.

关 键 词：斜交煤柱 集中应力 数值模拟 

分 类 号：TD323[矿业工程—矿井建设]