煤炭科技2025，Vol.46Issue(3)：34-41,46,9.DOI:10.19896/j.cnki.mtkj.2025.03.006
不规则煤柱周围工作面回采围岩应力变化规律及其影响分析
Stress variation law of surrounding rock and its influence analysis of working face mining around irregular coal pillars
摘要
Abstract
Aiming at the mining of the working face around the residual coal pillar in No.3 coal seam of Xiangshan Mine,the FLAC3D was used to construct a three-dimensional numerical calculation model to study and analyze the stress evolution law in the mining process of the working face around the irregular coal pillar.The study result shows that the maximum influence range of the abutment pressure of the upper coal seam excavation on the front and both sides of the coal pillar is 90 m,the influence range of the advance abut-ment pressure in the lower coal seam is 80 m.The maximum vertical stress on the coal pillar is located at 485 m,675 m and 625 m re-spectively after mining in the working face,while the maximum vertical stress on the coal body is located at 625 m,675 m,and 555 m after mining in the 0 working face;At the same time,it is known that the influence of irregular coal pillars in the upper coal seam on the abutment pressure of the lower coal seam working face is more serious than that of the lower coal seam working face in the goaf.The maximum vertical stress is between 32.7 MPa and 65.5 MPa,which is easy to cause rock burst.关键词
不规则煤柱/数值模拟/支承压力/冲击地压Key words
irregular coal pillar/numerical simulation/supporting pressure/rock burst分类
矿业与冶金引用本文复制引用
吴志刚,钱万学,侯挺,张奇..不规则煤柱周围工作面回采围岩应力变化规律及其影响分析[J].煤炭科技,2025,46(3):34-41,46,9.基金项目
国家重点研发计划项目(2017YFC0603001) （2017YFC0603001）
