(1. Faculty of Safety Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221008,China;2. Energy Chemical Industry Research Institute,China Pingmei Shenma Group,Pingdingshan,Henan 467000,China;3. State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,
Wuhan,Hubei 430071,China)
Abstract:A typical deep roadway with large-scale soft surrounding rock is researched here to study the stability of surrounding rock in Pingdingshan coal mine. With the laboratory experiment,the complex geological condition in deep rock roadway was determined. Discrete element method was adopted to simulate the deformation and failure of surrounding rock. The failure mechanism of surrounding rock was revealed. Technologies of spray layer which resisted bending and cracking and floor heave control were proposed. The main reason for instability of soft surrounding rock in deep rock roadway is the lower rock strengthen and the high geostress. The tensile failure appeared at vault and two side-walls and in the middle of floor at first. Then,the shear failure appeared at spandrel and two base angles. The failure zone extended into the deep area until the roadway is instable. According to the in-situ monitor data,it is concluded that stress in anchor and cable tended to be stable after supporting for two months,as well as the horizontal convergence,vault subsidence and floor heave. It means that the supporting technology works and the stability of soft surrounding rock in deep rock roadway is controlled.
郭建伟1,2,刘泉声3,杨战标2,刘 滨3. 平顶山矿区深部大规模松软围岩巷道支护技术[J]. 岩石力学与工程学报, 2012, 31(s2): 3904-3910.
GUO Jianwei1,2,LIU Quansheng3,YANG Zhanbiao2,LIU Bin3. SUPPORT TECHNOLOGY TO DEEP LARGE-SCALE SOFT SURROUNDING ROCK OF ROADWAY IN
PINGDINGSHAN COAL MINE. , 2012, 31(s2): 3904-3910.
张 农,高明仕. 煤巷高强预应力锚杆支护技术与应用[J]. 中国矿业大学学报,2004,33(5):524-527.(ZHANG Nong,GAO Mingshi. High strength and pretension bolting support of coal roadway and its application[J]. Journal of China University of Mining and Technology,2004,33(5):524-527.(in Chinese))
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