本文關(guān)鍵詞： 特長(zhǎng)鐵路隧道 施工通風(fēng) 瓦斯擴(kuò)散 方案優(yōu)化 風(fēng)室接力 安全控制技術(shù)　出處：《西南交通大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：在國(guó)家"一帶一路"政策的帶動(dòng)下,鐵路、公路的建設(shè)進(jìn)入了高速、全面發(fā)展的階段。大量工程實(shí)踐表明,穿越煤系及非煤系的特長(zhǎng)瓦斯鐵路隧道面臨嚴(yán)峻的長(zhǎng)距離施工通風(fēng)問(wèn)題及瓦斯溢出的突發(fā)災(zāi)害安全問(wèn)題。論文以營(yíng)盤(pán)山特長(zhǎng)瓦斯鐵路隧道為工程依托,結(jié)合計(jì)算流體力學(xué)理論,圍繞特長(zhǎng)鐵路瓦斯隧道長(zhǎng)距離多工作面施工通風(fēng)問(wèn)題展開(kāi)系統(tǒng)研究;基于FLUENT三維數(shù)值模擬以及現(xiàn)場(chǎng)測(cè)試研究方法,對(duì)施工過(guò)程中的風(fēng)流流場(chǎng)、瓦斯運(yùn)移擴(kuò)散規(guī)律以及污染物排出效果進(jìn)行研究,并針對(duì)研究結(jié)果提出施工通風(fēng)安全控制技術(shù)措施及工程應(yīng)用。本文主要研究成果如下:1.根據(jù)營(yíng)盤(pán)山特長(zhǎng)瓦斯鐵路隧道特點(diǎn),結(jié)合理論分析,提出不同階段長(zhǎng)距離隧道施工通風(fēng)方案,確定了第一階段采用獨(dú)頭壓入式通風(fēng),待橫通道打通后,第二階段3個(gè)斜井工區(qū)采用風(fēng)室接力的通風(fēng)模式,進(jìn)口工區(qū)及出口工區(qū)采用巷道式通風(fēng)的施工通風(fēng)方式,降低了通風(fēng)成本,提高了施工效率。2.基于對(duì)營(yíng)盤(pán)山隧道通風(fēng)流場(chǎng)數(shù)值模擬分析,探明了附壁射流流動(dòng)、瓦斯運(yùn)移擴(kuò)散規(guī)律,得出通風(fēng)效率降低區(qū)域以及瓦斯易聚集區(qū)域,提出風(fēng)室接力+巷道式通風(fēng)方案通風(fēng)效率高于壓入式通風(fēng)效率。3.對(duì)營(yíng)盤(pán)山隧道瓦斯通風(fēng)進(jìn)行了現(xiàn)場(chǎng)測(cè)試,根據(jù)現(xiàn)場(chǎng)測(cè)試方案對(duì)隧道內(nèi)風(fēng)速及瓦斯?jié)舛葴y(cè)試數(shù)據(jù)進(jìn)行了分析,得出了瓦斯?jié)舛茸兓?guī)律及其影響因素,確定了現(xiàn)場(chǎng)通風(fēng)方案能夠滿足通風(fēng)要求。并將測(cè)試結(jié)果與數(shù)值模擬結(jié)果進(jìn)行對(duì)比,得出二者相關(guān)性較好,驗(yàn)證了數(shù)值模擬的正確性。4.基于FLUENT三維數(shù)值模擬以及現(xiàn)場(chǎng)測(cè)試結(jié)果,結(jié)合營(yíng)盤(pán)山特長(zhǎng)瓦斯鐵路隧道實(shí)際情況,提出使用瓦斯自動(dòng)監(jiān)控預(yù)警系統(tǒng)與施工通風(fēng)技術(shù)措施、通風(fēng)管理措施相結(jié)合的瓦斯隧道施工通風(fēng)安全控制技術(shù)。
[Abstract]:Driven by the national "Belt and Road" policy, the construction of railways and highways has entered a stage of high speed and all-round development. A large number of engineering practices have shown that. The tunnel of extra-long gas railway passing through coal measure and non-coal measure is faced with severe problems of ventilation in long distance construction and safety of gas overflow. Based on Yingpanshan extra long gas railway tunnel and combined with computational fluid mechanics theory, the paper takes Yingpanshan extra long gas railway tunnel as engineering support. Based on the three-dimensional numerical simulation of FLUENT and the field test method, the wind flow field in the construction process is studied systematically around the ventilation problem in the long distance and multi-face construction of the gas tunnel of the super-long railway. The law of gas migration and diffusion and the effect of pollutant discharge are studied, and the technical measures and engineering application of construction ventilation safety control are put forward according to the research results. The main research results of this paper are as follows: 1. According to the characteristics of Yingpanshan extra long gas railway tunnel, Combined with theoretical analysis, the ventilation scheme of long distance tunnel construction in different stages is put forward, and the ventilation mode of air chamber relay is determined in the first stage, after the opening of the horizontal passage, and in the second stage, the ventilation mode of air chamber relay is adopted in the three inclined shaft working areas. The construction ventilation mode of roadway ventilation is adopted in the imported and outlet working areas, which reduces the ventilation cost and improves the construction efficiency .2.Based on the numerical simulation analysis of ventilation flow field in Yingpanshan Tunnel, the wall attached jet flow is proved. According to the law of gas migration and diffusion, the area where ventilation efficiency is reduced and the area where gas is easily accumulated, the ventilation efficiency of relay tunnel ventilation scheme in air chamber is higher than that of pressure-in ventilation efficiency .3.The field test of gas ventilation in Yingpanshan tunnel is carried out. According to the field test scheme, the test data of wind speed and gas concentration in tunnel are analyzed, and the variation law of gas concentration and its influencing factors are obtained. It is determined that the on-site ventilation scheme can meet the ventilation requirements, and the test results are compared with the numerical simulation results, and the correlation between the two results is good, which verifies the correctness of the numerical simulation. 4. Based on the three-dimensional numerical simulation of FLUENT and the field test results, Combined with the actual situation of Yingpanshan extra-long gas railway tunnel, this paper puts forward the safety control technology of gas tunnel construction ventilation by using automatic monitoring and warning system of gas, ventilation technical measures of construction and ventilation management measures.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：U453.5

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