發(fā)布時間：2018-02-03 03:17

  本文關(guān)鍵詞： 瓦斯爆炸 抑爆 粉體 二氧化碳　出處：《西安科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：瓦斯爆炸是我國煤礦災(zāi)害的主要形式之一，具有很強的突發(fā)性、破壞性。如何在實際中有效的防治瓦斯爆炸，具有十分重要的意義。其中粉體和惰性氣體抑爆技術(shù)一直是國內(nèi)研究的重點。本文利用20L近球形不銹鋼爆炸系統(tǒng)，選取CO_2惰性氣體，Mg(OH)_2、ABC粉體作為抑爆劑，通過研究不同甲烷濃度在粉體、CO_2氣體及氣-固混合抑制劑條件下的爆炸壓力峰值、最大壓力上升速率等特性參數(shù)，分析了其對瓦斯爆炸的抑制規(guī)律及抑爆效果。 實驗結(jié)果表明：CO_2惰性氣體、Mg(OH)_2、ABC粉體分別抑制瓦斯爆炸時，CO_2氣體對瓦斯的抑爆效果最好。添加8%濃度CO_2使得11%濃度甲烷爆炸壓力峰值時間延長3.14倍，爆炸壓力峰值和最大壓力上升速率下降幅度分別為28.7%、79.9%。Mg(OH)_2/CO_2混合抑制瓦斯爆炸時，爆炸壓力峰值和最大壓力上升速率降低，爆炸壓力峰值時間延長，有一定的抑制效果。0.25g/L Mg(OH)_2與8%CO_2混合抑制時使得11%濃度甲烷爆炸壓力峰值時間延長3.76倍，爆炸壓力峰值和最大壓力上升速率下降幅度分別為45.6%、79.9%。ABC/CO_2混合抑制瓦斯爆炸時，爆炸壓力峰值和最大爆炸壓力上升速率明顯降低，爆炸壓力峰值時間明顯延長，抑爆作用更加明顯。且隨著甲烷濃度的增加，抑爆效果更加顯著。甲烷濃度為11%時，，0.20g/L、0.25g/L、0.30g/L ABC粉體分別混合8%CO_2氣體條件下，甲烷均沒有發(fā)生爆炸。 該研究對采用氣-固混合抑制劑抑制礦井瓦斯爆炸提供了實驗數(shù)據(jù)，具有一定的指導(dǎo)意義。
[Abstract]:Gas explosion is one of the main forms of coal mine disasters in China. It is very sudden and destructive. How to effectively prevent gas explosion in practice. Powder and inert gas explosion suppression technology has been the focus of domestic research. In this paper, 20L near-spherical stainless steel explosion system is used to select CO_2 inert gas. The explosion pressure peak of MgOH _ 2C _ (2) C _ (2) powder was studied under the condition of different methane concentration under the condition of the mixture of CO _ (2) gas and gas-solid inhibitor. The characteristic parameters such as the maximum pressure rise rate are analyzed, and the suppression law and effect of the gas explosion are analyzed. The experimental results show that the gas explosion can be inhibited by MgCO-2 inert gas. The effect of CO_2 gas on gas explosion is the best. Adding 8% concentration of CO_2 makes the peak time of explosion pressure of 11% concentration methane prolonged 3.14 times. The peak value of explosion pressure and the decreasing range of maximum pressure rise rate are 28.79.9. when the gas explosion is suppressed, the gas explosion is inhibited by mixed suppression of gas explosion. The peak value of explosion pressure and the rate of maximum pressure rise were decreased, and the peak time of explosion pressure was prolonged. There was a certain inhibitory effect. 0.25 g / L Mg(OH)_2 and 8COSP2 inhibited the peak time of methane explosion pressure of 11% concentration prolonged 3.76 times. The peak value of explosion pressure and the decrease of maximum pressure rise rate were 45.6% and 79.9%, respectively, when the gas explosion was inhibited by the mixture of ABC / CO-2. The peak explosion pressure and the maximum explosion pressure rise rate are obviously decreased, the explosion pressure peak time is obviously prolonged, the explosion suppression effect is more obvious, and with the increase of methane concentration. The effect of explosion suppression is even more remarkable. The methane concentration of 0.20g / L 0.25g / L 0.30g / L ABC powder is mixed with 8s / kg CO _ 2 gas respectively at the concentration of 0.20g 路L ~ (-1) 路L ~ (-1) 路L ~ (-1). None of the methane exploded. This study provides experimental data for the suppression of mine gas explosion by gas-solid mixture inhibitor, and has certain guiding significance.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712.7

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