高速公路隧道受下臥煤層采動的影響研究
發(fā)布時間：2018-08-30 12:09
【摘要】：目前國內(nèi)外針對建筑物、水體以及鐵路下壓煤開采的研究比較多,但就壓覆礦產(chǎn)未來開采對新建結(jié)構(gòu)物在設(shè)計上應(yīng)采取的對策研究較少,尤其針對高速公路隧道如何適應(yīng)未來壓煤開采的影響,分析理論還不夠完善,現(xiàn)有的研究大多都是建立在實地調(diào)查和經(jīng)驗的基礎(chǔ)上,深入系統(tǒng)的研究尚不多見。對公路隧道下臥煤層的開采,既要保證隧道結(jié)構(gòu)的穩(wěn)定,又要盡可能多的采出煤炭資源,減少壓煤量及資源的損失,創(chuàng)造出更多的經(jīng)濟效益。為此,本文在綜述了國內(nèi)外研究現(xiàn)狀的基礎(chǔ)之上,采用理論分析與數(shù)值模擬相結(jié)合的綜合研究分析方法,運用科學(xué)的預(yù)計方法,預(yù)測出隧道受采動影響的移動和變形數(shù)據(jù),并通過對隧道關(guān)鍵斷面移動變形的全面分析,完成南萬高速公路隧道受下臥煤層的采動影響研究,針對隧道結(jié)構(gòu)物提出必要的措施來適應(yīng)煤層開采后的變形,為類似高速公路隧道設(shè)計提供參考。主要的研究內(nèi)容包括： ①以重慶南萬高速公路為典型實例,開展了對路段地質(zhì)構(gòu)造、地層、水文的勘察及煤層分布與隧道位置關(guān)系的分析,論述了該路段地址構(gòu)造之復(fù)雜； ②根據(jù)物探勘察資料,并在煤礦主要井巷禁采區(qū)域計算方法的基礎(chǔ)之上,對隧道確定了采動保護范圍和禁采區(qū)域； ③選取基本的變形參數(shù),運用概率積分法預(yù)計青山隧道和叢林隧道各預(yù)計位置點受下臥煤層開采引起的移動和變形數(shù)據(jù),并繪制隧道下沉及變形曲線圖； ④根據(jù)隧道所在位置的地質(zhì)勘察資料,運用ABAQUS有限元軟件建立相應(yīng)隧道的數(shù)值計算模型； ⑤運用有限元軟件將理論預(yù)計的移動變形數(shù)據(jù)施加在隧道相應(yīng)的關(guān)鍵斷面點上,分析了隧道襯砌結(jié)構(gòu)位移、應(yīng)力及內(nèi)力變化的情況,與煤層采動高速公路一般構(gòu)筑物的允許變形值作比較分析,并提出隧道受下臥煤層采動的穩(wěn)定影響及設(shè)計時可采取的適應(yīng)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.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U452.11
本文編號：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.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U452.11
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