高速公路隧道受下卧煤层采动的影响研究
发布时间：2018-08-30 12:09
【摘要】：目前国内外针对建筑物、水体以及铁路下压煤开采的研究比较多,但就压覆矿产未来开采对新建结构物在设计上应采取的对策研究较少,尤其针对高速公路隧道如何适应未来压煤开采的影响,分析理论还不够完善,现有的研究大多都是建立在实地调查和经验的基础上,深入系统的研究尚不多见。对公路隧道下卧煤层的开采,既要保证隧道结构的稳定,又要尽可能多的采出煤炭资源,减少压煤量及资源的损失,创造出更多的经济效益。为此,本文在综述了国内外研究现状的基础之上,采用理论分析与数值模拟相结合的综合研究分析方法,运用科学的预计方法,预测出隧道受采动影响的移动和变形数据,并通过对隧道关键断面移动变形的全面分析,完成南万高速公路隧道受下卧煤层的采动影响研究,针对隧道结构物提出必要的措施来适应煤层开采后的变形,为类似高速公路隧道设计提供参考。主要的研究内容包括： ①以重庆南万高速公路为典型实例,开展了对路段地质构造、地层、水文的勘察及煤层分布与隧道位置关系的分析,论述了该路段地址构造之复杂； ②根据物探勘察资料,并在煤矿主要井巷禁采区域计算方法的基础之上,对隧道确定了采动保护范围和禁采区域； ③选取基本的变形参数,运用概率积分法预计青山隧道和丛林隧道各预计位置点受下卧煤层开采引起的移动和变形数据,并绘制隧道下沉及变形曲线图； ④根据隧道所在位置的地质勘察资料,运用ABAQUS有限元软件建立相应隧道的数值计算模型； ⑤运用有限元软件将理论预计的移动变形数据施加在隧道相应的关键断面点上,分析了隧道衬砌结构位移、应力及内力变化的情况,与煤层采动高速公路一般构筑物的允许变形值作比较分析,并提出隧道受下卧煤层采动的稳定影响及设计时可采取的适应性措施。
[Abstract]:At present, there are many researches on coal mining of buildings, water bodies and railways at home and abroad, but there are few researches on the design of new structures for the mining of cladding minerals in the future. Especially for highway tunnel how to adapt to the impact of coal mining in the future, the analysis theory is not perfect, most of the existing research is based on field investigation and experience, in-depth and systematic research is still rare. For the mining of the underlying coal seam of the highway tunnel, it is necessary to ensure the stability of the tunnel structure, and to produce as much coal resources as possible, to reduce the loss of coal pressure and resources, and to create more economic benefits. Therefore, on the basis of summarizing the present research situation at home and abroad, this paper uses a comprehensive research and analysis method combined with theoretical analysis and numerical simulation, and uses scientific prediction method to predict the movement and deformation data of tunnel affected by mining. Through the comprehensive analysis of the movement and deformation of the key section of the tunnel, the study on the influence of the mining movement of the underlying coal seam on the tunnel of Nanwan Expressway is completed, and the necessary measures are put forward for the tunnel structure to adapt to the deformation of the coal seam after mining. It provides reference for similar highway tunnel design. The main research contents are as follows: 1 taking the Nanwan Expressway in Chongqing as a typical example, the geological structure, strata and hydrology of the section and the relationship between the distribution of coal seam and the location of the tunnel are analyzed. Based on the geophysical prospecting data and the calculation method of the mining area of the main shaft and roadway, the mining protection area and the mining no mining area are determined for the tunnel. (3) selecting the basic deformation parameters, using the probability integral method to predict the movement and deformation data caused by the mining of the lying coal seam at each predicted position of the Qingshan Tunnel and the Jungle Tunnel, and drawing the curves of the tunnel subsidence and deformation; (4) based on the geological survey data of the tunnel location, the numerical calculation model of the tunnel is established by using the ABAQUS finite element software. Using finite element software to apply the data of movement and deformation predicted by theory to the corresponding key section points of tunnel, the variation of displacement, stress and internal force of tunnel lining structure is analyzed. Compared with the allowable deformation value of the general structure of coal seam mining highway, the tunnel is influenced by the stability of coal seam mining and the adaptive measures can be taken in the design.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452.11
本文编号：2213030
[Abstract]:At present, there are many researches on coal mining of buildings, water bodies and railways at home and abroad, but there are few researches on the design of new structures for the mining of cladding minerals in the future. Especially for highway tunnel how to adapt to the impact of coal mining in the future, the analysis theory is not perfect, most of the existing research is based on field investigation and experience, in-depth and systematic research is still rare. For the mining of the underlying coal seam of the highway tunnel, it is necessary to ensure the stability of the tunnel structure, and to produce as much coal resources as possible, to reduce the loss of coal pressure and resources, and to create more economic benefits. Therefore, on the basis of summarizing the present research situation at home and abroad, this paper uses a comprehensive research and analysis method combined with theoretical analysis and numerical simulation, and uses scientific prediction method to predict the movement and deformation data of tunnel affected by mining. Through the comprehensive analysis of the movement and deformation of the key section of the tunnel, the study on the influence of the mining movement of the underlying coal seam on the tunnel of Nanwan Expressway is completed, and the necessary measures are put forward for the tunnel structure to adapt to the deformation of the coal seam after mining. It provides reference for similar highway tunnel design. The main research contents are as follows: 1 taking the Nanwan Expressway in Chongqing as a typical example, the geological structure, strata and hydrology of the section and the relationship between the distribution of coal seam and the location of the tunnel are analyzed. Based on the geophysical prospecting data and the calculation method of the mining area of the main shaft and roadway, the mining protection area and the mining no mining area are determined for the tunnel. (3) selecting the basic deformation parameters, using the probability integral method to predict the movement and deformation data caused by the mining of the lying coal seam at each predicted position of the Qingshan Tunnel and the Jungle Tunnel, and drawing the curves of the tunnel subsidence and deformation; (4) based on the geological survey data of the tunnel location, the numerical calculation model of the tunnel is established by using the ABAQUS finite element software. Using finite element software to apply the data of movement and deformation predicted by theory to the corresponding key section points of tunnel, the variation of displacement, stress and internal force of tunnel lining structure is analyzed. Compared with the allowable deformation value of the general structure of coal seam mining highway, the tunnel is influenced by the stability of coal seam mining and the adaptive measures can be taken in the design.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452.11
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