Key Technical Research In Coal Tunnel Construction

Along with the western development and the needs of the development of China’s economy now needs; Now in the western region is in the large-scale infrastructure construction. Due to the complicated geological conditions in the western regions is more contain coal seam and cavity etc. Bad geological factors. This article is mainly aimed at zunyi city encountered in highway construction in coal tunnel has carried on the analysis and research of the relevant situation. This article mainly analyzed from the following several parts of coal measures strata of the tunnel.By domestic and foreign research present situation analysis of the coal seam tunnel, we could understand and grasp the relevant strata tunnel design and construction. At the same time, through the study of tunnel surrounding rock and supporting theory, the characteristics of the force and deformation of the tunnel had been further controled.The article has expounded uncovering coal of on-site construction. In wear uncovering coal in the construction of the tunnel construction that coal measures strata is a technical difficulty. In this paper, the concrete scheme of uncovering coal construction reference rules and contents of the construction of coal mines. At the same time, gas prevention and control is the key to the construction. This article simply introduces the concrete methods of gas prevention and control such as gas drainage of gas prevention and control of release.Using FLAC set up the model of tunnel excavation in combination with the actual situation of the construction site; Through the excavation of tunnel surrounding rock strata stress and deformation analysis of surrounding rock is obtained by analysis of the stress, displacement and plastic zone distribution of the tunnel surrounding situation.The paper analyzes the situation of the gas monitoring, the monitoring and controlling of the construction, through the comparison of monitoring data and numerical simulation can know simulation values to guide our is of important significance for design and construction of concrete.