气—固混合抑制剂对矿井瓦斯的抑爆实验研究

发布时间：2018-02-03 03:17

本文关键词： 瓦斯爆炸抑爆粉体二氧化碳　出处：《西安科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：瓦斯爆炸是我国煤矿灾害的主要形式之一，具有很强的突发性、破坏性。如何在实际中有效的防治瓦斯爆炸，具有十分重要的意义。其中粉体和惰性气体抑爆技术一直是国内研究的重点。本文利用20L近球形不锈钢爆炸系统，选取CO_2惰性气体，Mg(OH)_2、ABC粉体作为抑爆剂，通过研究不同甲烷浓度在粉体、CO_2气体及气-固混合抑制剂条件下的爆炸压力峰值、最大压力上升速率等特性参数，分析了其对瓦斯爆炸的抑制规律及抑爆效果。实验结果表明：CO_2惰性气体、Mg(OH)_2、ABC粉体分别抑制瓦斯爆炸时，CO_2气体对瓦斯的抑爆效果最好。添加8%浓度CO_2使得11%浓度甲烷爆炸压力峰值时间延长3.14倍，爆炸压力峰值和最大压力上升速率下降幅度分别为28.7%、79.9%。Mg(OH)_2/CO_2混合抑制瓦斯爆炸时，爆炸压力峰值和最大压力上升速率降低，爆炸压力峰值时间延长，有一定的抑制效果。0.25g/L Mg(OH)_2与8%CO_2混合抑制时使得11%浓度甲烷爆炸压力峰值时间延长3.76倍，爆炸压力峰值和最大压力上升速率下降幅度分别为45.6%、79.9%。ABC/CO_2混合抑制瓦斯爆炸时，爆炸压力峰值和最大爆炸压力上升速率明显降低，爆炸压力峰值时间明显延长，抑爆作用更加明显。且随着甲烷浓度的增加，抑爆效果更加显著。甲烷浓度为11%时，，0.20g/L、0.25g/L、0.30g/L ABC粉体分别混合8%CO_2气体条件下，甲烷均没有发生爆炸。该研究对采用气-固混合抑制剂抑制矿井瓦斯爆炸提供了实验数据，具有一定的指导意义。
[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.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712.7

【参考文献】