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为研究CO_2气体对瓦斯爆炸的阻尼效应,以定容弹模型模拟采空区(受限空间),采用数值计算方法,从化学动力学角度,在机理上进行了研究。结果表明:随着CO_2气体的冲入,瓦斯爆炸延迟时间逐渐增大,爆炸强度逐渐减弱,对灾害气体(NO)及链式反应自由基的抑制加强,同时促进甲烷生成与消耗的关键反应步敏感性系数整体不断降低,但促进CH4生成降低幅度小于促进CH4消耗降低幅度。
In order to study the damping effect of CO_2 gas on gas explosion, the mined-out area (confined space) is modeled by a constant volume model. The mechanism is studied from the point of view of chemical kinetics. The results show that with the infiltration of CO 2 gas, the delay time of gas explosion gradually increases, the intensity of explosion gradually decreases, the inhibition of gas (NO) and chain reaction radicals is enhanced, and the key reaction steps to promote methane generation and consumption The overall sensitivity coefficient decreased continuously, but the reduction of CH4 generation was less than the reduction of CH4 consumption.