Fire and Explosion Prevention Research Branch, Chongqing Research Institute, China Coal Technology Engineering
Group

为研究井下瓦斯爆炸诱导沉积煤尘参与爆炸现象,利用独头试验巷道模拟不同体积瓦斯爆炸产生不同诱导强度的冲击气流,并对沉积煤尘的诱导飞扬能力和参与爆炸传播规律进行研究。结果表明:瓦斯爆炸产生的冲击气流能卷扬沉积煤尘飞扬,形成煤尘"二次爆炸",进一步扩大爆炸的伤害范围;当瓦斯区的气体体积从50 m3增加到200 m3时,瓦斯爆炸产生冲击气流在瓦斯段峰值压力从0.14 MPa增加到0.31 MPa,卷扬沉积煤尘的诱导卷扬能力增强;试验测试煤尘段的最大爆炸压力分别达到0.36和0.83 MPa;无煤尘火焰长度分别为75.1和115.2 m,整个爆炸过程朝更迅猛的方向发展。

In order to study the phenomenon of deposited coal dust explosion induced by gas explosion, the experiments were carried out in the experimental road way with single head, and the ability of induction to deposited coal dust and propagation law were researched by different intense of impact flow in gas explosion with di fferent volume. The results showed that the impact flow of gas explosion could hoist deposited coal dust to participate propagation, form dust explosion, and expand the scope of damage. When the volume of gas area increased from 50 m3 to 200 m3, the peak pressure of impact flow increased from0.14 MPa to0.31 MPa, and the induci ng capacity of deposited coal dust was enhanced. The maximum pressure in test section was 0.36 MPa and 0. 83 MPa, and the no- coal dust flame length was 75. 1 m and 115. 2 m respectively. The explosion process would be more rapid.

国家自然科学基金资助项目(51382733)；中国煤炭科工集团重庆研究院青年创新基金资助项目(2012QNJJ21)；