摘要
针对煤粉对泡沫金属抑制爆炸火焰传播速度的影响进行了相关实验,着重分析了煤粉在管道 内有抑爆介质时的运移规律和对其抑爆效果的影响机理。管道内煤粉在爆炸冲击波的影响下分为3个部 分:未被扬起滞留在抑爆材料前一部分;滞留在抑爆材料上一部分;穿过抑爆材料逸散一部分。煤粉对泡 沫金属抑爆性能的影响主要体现在:当煤粉粒径一定时,煤粉质量过大或过小对泡沫金属抑爆性能影响 不大。煤粉质量过小时,大部分煤粉经过泡沫金属逸出,对其抑爆性能影响较小;而当煤粉质量过大时, 局部区域氧气浓度不足,滞留在泡沫金属上的煤粉不易燃烧,对泡沫金属的抑爆性能影响也较小。当煤 粉质量一定,粒径越接近泡沫金属孔径,煤粉越易滞留在泡沫金属上,对其抑爆性能影响也越大。
Experiments are carried out to investigate the effect of pulverized coal on the flame propagation velocity of foam metal,and the migration laws of pulverized coal when it has explosion suppression medium in pipeline and the mechanism of its explosion suppression effect are emphatically analyzed. The pulverized coal in the pipeline is divided into three parts under the influence of explosion shock wave: remaining in the front part of the explosive suppression material without being raised;a portion remaining on the explosive suppression material;part of the material passing through the explosion suppressor. The influence of pulverized coal on the explosion suppression performance of foamed metal is mainly reflected in the following aspects: when the particle size of the pulverized coal is fixed, too large or too small weight of coal powder has little effect on the explosion suppression performance of foam metal. When the mass of pulverized coal is too small, most of the pulverized coal escapes through foam metal, which has little effect on its explosion suppression performance. However, when the mass of pulverized coal is too large, the oxygen concentration in the local area is insufficient, and the coal remaining on the foam metal is not easy to burn,which has a small impact on the explosion suppression performance of the foam metal. When the quality of pulverized coal is constant and the particle size is closer to the pore diameter of foam metal, the pulverized coal stays on the foam metal is more easily and the impact on its explosion suppression performance is greater.
作者
王亚军
吴征艳
赵红梅
王磊
邵昊
WANG Yajun;WU Zhengyan;ZHAO Hongmei;WANG Lei;SHAO Hao(School of Safety Engineering,China University of Mining&Technology,Xuzhou 221116,China;School of Safety Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine,Huainan 232001,China)
出处
《煤矿安全》
CAS
北大核心
2019年第11期180-184,共5页
Safety in Coal Mines
基金
黑龙江省自然科学青年基金资助项目(QC2015054)
国家安全监督管理总局2016重大事故防治关键技术科技资助项目(heilongjiang-0001-2016AQ)
省部共建深部煤矿采动响应与灾害防控国家重点实验室(筹)资助项目(KLDCMERDPC16102)
关键词
瓦斯爆炸
泡沫金属
抑制
煤粉
火焰速度
gas explosion
foam metal
inhibition
coal dust
flame propagation velocity