采空区侧煤体的应力与瓦斯分布规律研究  

Study on the distribution law of stress and gas in the coal mass on the side of goaf

作　　者：王迪 韩红凯 任培良 刘彦伟[2,3] 左伟芹[2,3] 张帅 史灿 WANG Di;HAN Hongkai;REN Peiliang;LIU Yanwei;ZUO Weiqin;ZHANG Shuai;SHI Can(Mengjin Coal Mine Co.,Ltd.,Yima Coal Industry(Group),Luoyang 471142,Henan,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechinc University,Jiaozuo 454000,Henan,China;School of Safety Science and Engineering,Henan PolytechnicUniversity,Jiaozuo 454000,Henan,China;Yima Coal Industry(Group)Xin’an Yunding Coal Mine Co.,ltd.,Luoyang 471800,Henan,China)

机构地区：[1]义马煤业集团孟津煤矿有限责任公司,河南洛阳471142 [2]河南理工大学河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454000 [3]河南理工大学安全科学与工程学院,河南焦作454000 [4]义煤集团新安县云顶煤业有限公司,河南洛阳471800

出　　处：《河南理工大学学报（自然科学版）》2023年第2期42-48,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(52104190);中国博士后科学基金资助项目(2020M682291,2022T150194);河南省重点研发与推广专项项目(科技攻关)(222102320012);河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金资助项目(WS2021A05);河南省高等学校重点科研项目(21A440009)。

摘　　要：掌握采空区侧煤体的应力与瓦斯分布,对预测矿井沿空掘巷煤与瓦斯突出危险性以及防治突出事故具有重要指导意义。以孟津煤矿为例,通过现场实测采空区侧煤体的应力和瓦斯相对涌出量等参数,结合数值模拟得出采空区侧煤体的应力、渗透率和瓦斯分布规律及其之间的关联性。结果表明:邻近采空区煤体的应力与瓦斯相对涌出量显著降低,且采空区形成时间越久,瓦斯有效排放范围越大,煤与瓦斯突出危险性越低;采空区侧煤体的应力和瓦斯分布存在明显正相关性,煤体的卸压和塑性破坏造成煤体渗透率显著增大;采空区侧煤体的极限平衡区宽度越大,渗透率出现增大的煤体范围越大,进而引起瓦斯有效排放范围越大。12050采空区侧煤体卸压区、极限平衡区和瓦斯有效排放范围分别为19.3,23.4,28.7 m,该范围内突出预测指标均低于临界值,为12070工作面沿空掘巷防治煤与瓦斯突出提供了理论指导。Mastering the distribution law of stress and gas in the coal mass on the side of goaf is of great guiding significance for predicting the outburst hazard of roadway driving along goaf and preventing outburst accidents.Taking Mengjin coal mine as an example,the relation between stress,permeability and gas distri⁃bution law of coal body in the goaf side could be obtained through numerical simulation and field measure⁃ment of stress and gas content of the coal mass on the side of goaf.The results showed that the coal body stress and gas content of adjacent goaf decreased significantly,and the longer the goaf was placed,the larger effective gas emission relief range was,and the more unfavorable the occurrence of coal and gas out⁃burst accident was.There is obviously positively correlated between the stress and gas distribution,and the stress relief and plastic failure of the coal resulted in the significant increase of permeability of coal.The wider limit equilibrium zone of coal mass on the side of goaf was,the larger coal body width with increased permeability would be,and the larger the effective gas emission relief range would be.The stress relief zone,limit equilibrium zone and effective gas emission relief range in the coal mass on the side of goaf 12050 were 19.3 m,23.4 m and 28.7 m respectively.The outburst prediction indicators within the effective gas emission relief range were all lower than the critical value.The results could guide the mining practice of preventing coal and gas outburst by driving roadway along goaf of working face 12070.

关 键 词：沿空掘巷 瓦斯场 采动应力 卸压区 煤与瓦斯突出 

分 类 号：TD712[矿业工程—矿井通风与安全]