Study of the destruction of ventilation systems in coal mines due to gas explosions
Study of the destruction of ventilation systems in coal mines due to gas explosions
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DOI：
10.1016/j.powtec.2015.08.020
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发表时间：
2015-12
影响因子：
5.2
通讯作者：
Kai Wang;Shuguang Jiang;Xiaoping Ma;Zhengyan Wu;Weiqing Zhang;Hao Shao
中科院分区：
文献类型：
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作者：
Kai Wang;Shuguang Jiang;Xiaoping Ma;Zhengyan Wu;Weiqing Zhang;Hao Shao
瓦斯爆炸对全世界采矿业的安全构成严重威胁。许多煤矿工人因采矿爆炸而丧生。瓦斯爆炸引起的通风系统故障是煤矿伤亡事故的主要原因。在这项研究中，建立了两个模型来模拟通风系统中，气体爆炸经常发生。这些模型由一个管道和薄弱的面板组成。利用各个模型，验证了超压冲击波的传播和在通风系统上的分布。针对局部通风系统中多通风设施的特点，分析了局部网络模型中弯道和分叉的联合作用以及超压波对通风设施的破坏。通过分析甲烷/空气混合物爆炸超压波在管道模型中的分布情况，利用破片尺寸统计结果表征了弱板对爆炸冲击波的影响及爆炸损伤程度。爆炸波正向超压峰值高于手肘弯曲方向的超压峰值。爆炸后，立即提取生产气体并分析其组成。根据管道模型试验结果，确定了局部通风系统中不同通风设施的破坏顺序。分析了瓦斯爆炸对通风网络和工作人员的危害，设计了备用门，用于瓦斯爆炸后通风系统的恢复。
Gas explosions presented a serious safety threat in the mining industry worldwide. Many coal miners had been killed due to explosions in mining. The malfunction of a ventilation system caused by a gas explosion was the primary reason for casualties in coal mines. In this study, two models were built to simulate ventilation systems in which gas explosions often occur. The models consisted of a pipe incorporating weak panels. Using each model, the propagation of the overpressure shock wave and the distribution on the ventilation system were verified. According to the characteristics of multiple ventilation facilities in a local ventilation system, the combined effects of bends and bifurcations and the destruction of ventilation facilities in the local network model due to an overpressure wave were analyzed. By analyzing the distribution of the methane/air mixture explosion overpressure wave in the pipe models, the effect of a weak panel on the explosion shock wave and the degree of explosion damage were characterized by the statistical results from the sizes of the fragments. The explosion wave peak overpressure in the forward direction was higher than the peak overpressure in the elbow bend direction. After explosion, the production gas was immediately extracted and the composition was analyzed. The destruction order for different ventilation facilities in the local ventilation system was determined according to the pipe model experimental results. The disaster of gas explosion for ventilation network and workers was analyzed, and the spare door was designed to recover the ventilation system after gas explosion.