EVALUATION OF ROADBED DEFORMATION AND TRANSPORTATION SECURITY OF RAILWAYS ABOVE SALT CAVERN GAS STORAGE GROUP
KONG Junfeng1,LI Yinping1,YANG Chunhe1,2,YIN Dongliang3,JING Wenjun1,ZHENG Yun1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;2. Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering,Ministry of Education,Chongqing University,Chongqing 400044,China;3. Jintan Gas Storage Project Department,Sichuan-to-East Natural Gas Transmission Pipeline Branch Company of SINOPEC,Jintan,Jiangsu 213200,China)
Abstract:It is a key problem for reducing the width of railway safety belt reasonably according to the evaluation result of railway roadbed subsidence and deformation,which determines the feasibility of Hubei Yunying salt cavern gas storage group. The creep contraction of salt cavern volume during operation period is the main cause of ground subsidence. Based on the hypothesis that the subsidence basin volume approximately has a relation of direct ratio with the creep contraction volume,the ground subsidence curve could be fitted as a Gauss function. Two key parameters of volume transfer coefficient and impact angle were introduced;and the formula for ground subsidence above a single cavern was deduced under condition of a certain volume shrinkage. The formula was used in the ground subsidence prediction of planned Hubei Yunying salt cavern storage. Finally,the ground subsidence above the salt cavern gas storage group was forecasted by superposition method. To solve the conflict of railway safety belt and planned salt cavern site,according to different roadbed deformation standards and salt cavern gas storage group ground subsidence above prediction results,the suggestion of reducing width of railway safety belt is given,as well as the control method to reduce the ground subsidence above salt cavern gas storage group and the roadbed subsidence effect.
崔景昆,张学峰,赵晋泽. 郭二庄矿铁路下开采及铁路修复技术实践[J]. 中国煤炭,2009,35(5):51-53.(CUI Jingkun,ZHANG Xuefeng,ZHAO Jinze. On the practice of coal mining under railroad and railroad rehabilitation in Guoerzhuang[J]. China Coal,2009,35(5):51-53.(in Chinese))
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