公路隧道石门揭煤安全岩柱的数值模拟研究  

Numerical simulation research on safe rock pillars of crosscut uncovering coal in highway tunnel

作　　者：刘胜华 李鹏程 李树清 黄飞[2,3] 王荣荣 Liu Shenghua;Li Pengcheng;Li Shuqing;Huang Fei;Wang Rongrong(Zhejiang Jiaogong Hongtu Transportation Construction Co.,Ltd.,Hangzhou 310000,China;School of Resources Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Key Laboratory of Gas and Roof Disaster Prevention and Control in South Coal Mine,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]浙江交工宏途交通建设有限公司重遵扩容项目T1合同段项目经理部,浙江杭州310000 [2]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [3]湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201

出　　处：《能源与环保》2021年第3期183-187,192,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：浙江省建筑业技术创新协会2018年科研项目(2018B02);湖南省教育厅科学研究项目优秀青年项目(19B201)。

摘　　要：为探究瓦斯隧道不同地质条件下对安全岩柱的影响,以重遵高速松坎隧道为工程背景,基于隧道揭煤应力演化等相关理论,建立了瓦斯隧道三维模型和数学模型,利用FLAC软件对2种开挖断面和3种煤层倾角的隧道进行了模拟计算,对比分析了隧道开挖过程中的煤岩应力变化规律,获得了开挖断面面积和煤层倾角对安全岩柱的影响。研究表明:同一煤层倾角,开挖断面越大,所需安全岩柱越厚,反之越薄;开挖断面面积相同时,煤层倾角越大,所需安全岩柱越厚。In order to explore the impact of gas tunnels on safe rock pillars under different geological conditions,with the Songkan Tunnel of Zhongzun Expressway as the engineering background,it was based on the relevant theories of the tunnel uncovering coal stress evolution,a three-dimensional model and mathematical model of the gas tunnel were established,and the FLAC software was used to two types of excavation cross-sectional area and three types of coal seam inclination angle tunnels were simulated and calculated.The coal and rock stress changes during the tunnel excavation process were compared and analyzed,and the influence of the excavation cross-sectional area and coal seam inclination angle on the safe rock pillar was obtained.Studies have shown that for the same coal seam inclination,the larger the excavation section,the thicker the required safety rock pillar,and vice versa;with the same excavation section,the greater the coal seam inclination,the thicker the required safety rock pillar.

关 键 词：瓦斯隧道 断面积 煤层倾角 安全岩柱 数值模拟 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]