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  本文選題：元可燃性氣體 + 爆炸特性��； 參考：《西安科技大學》2013年碩士論文

【摘要】：瓦斯爆炸是危害最大的礦井災害之一。高瓦斯礦井火區(qū)封閉過程中存在著很大的爆炸危險，研究礦井多元瓦斯氣體爆炸特性以及封閉區(qū)域內(nèi)的爆炸過程對防治瓦斯爆炸具有重要的現(xiàn)實意義。 本實驗利用20L近球形爆炸實驗裝置，分別測試了CH_4、CO、C_2H_6和H_2的爆炸極限，與文獻值進行對比，引入爆炸危險度的概念分析每種氣體的爆炸危險性；在此基礎(chǔ)上依據(jù)實際礦井氣體成分檢測結(jié)果，選取三組具有代表性的CO、C_2H_6、H_2濃度配比，測得每種配比條件下CH_4的爆炸極限及CH_4濃度6-12%時的爆炸特性參數(shù)，研究其他可燃性氣體對于CH_4爆炸特性的影響；選取純CH_4和一組多元可燃性氣體配比條件分別測試其臨界氧濃度，為井下現(xiàn)場的防爆工作提供一定的理論基礎(chǔ)。 利用專業(yè)氣體爆炸模擬軟件FLACS，對與實驗相同條件下的密閉空間多元可燃性氣體爆炸過程進行數(shù)值模擬，將模擬結(jié)果與實驗結(jié)果進行對比，分析誤差，驗證FLACS模擬多元可燃性氣體爆炸的可行性；通過分析不同時刻容器內(nèi)壓力場、爆炸產(chǎn)物濃度場、可燃性氣體濃度場及速率場的變化，揭示了爆炸波的傳播形態(tài)及小空間內(nèi)爆炸過程的壓力分布。 依托于實際礦井，建立了接近真實的U型通風工作面模型，利用FLACS軟件對巷道內(nèi)氣體爆炸過程進行了數(shù)值模擬，，并系統(tǒng)地研究了點火位置、可燃性氣體填充長度、氣體成分濃度、巷道內(nèi)障礙物及不同密閉情況對爆炸過程的影響。 本文研究所得可為高瓦斯礦井封閉火區(qū)內(nèi)的瓦斯爆炸控制提供一定借鑒。
[Abstract]:Gas explosion is one of the most harmful mine disasters. There is a great danger of explosion in the process of closing the fire area of high gas mine. It is of great practical significance to study the explosion characteristics of multiple gas in the mine and the explosion process in the closed area to prevent and cure the gas explosion. In this experiment, the explosion limit of CH4COG / C _ 2H _ 2H _ (6) and H _ s _ 2 was tested by using a 20L near-spherical explosive experimental device. The explosion hazard of each gas was analyzed by introducing the concept of explosion risk. On this basis, according to the actual mine gas composition detection results, three groups of representative COSC2H2H / SHP _ 2 concentration ratio are selected, and the explosion limit of CH_4 and the explosion characteristic parameters of 6-12% CH_4 concentration under each ratio are measured. The effects of other combustible gases on the explosion characteristics of CH_4 are studied, and the critical oxygen concentration of pure CH_4 and a group of multicomponent combustible gases are measured respectively, which provides a theoretical basis for the explosion prevention work in the underground field. The numerical simulation of multivariate combustible gas explosion in airtight space under the same experimental conditions was carried out by using the professional gas explosion simulation software FLACS. The simulation results were compared with the experimental results and the error was analyzed. The feasibility of simulating multicomponent combustible gas explosion by FLACS is verified, and the variation of pressure field, concentration field of explosion product, concentration field and rate field of combustible gas in vessel at different times are analyzed. The propagation pattern of explosion wave and the pressure distribution of explosion process in small space are revealed. Based on the actual mine, the model of U-type ventilation working face is established, and the numerical simulation of gas explosion process in roadway is carried out by using FLACS software, and the ignition position and the filling length of combustible gas are systematically studied. The effects of gas concentration, obstacles in roadway and different airtight conditions on the explosion process. The research in this paper can be used for reference for the control of gas explosion in the closed fire zone of high gas mine.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TD712.7

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