Numerical simulation of cavity elimination mechanism and an experimental study on its combined explosive suppressing explosion
LIU Wei1,2，MU Chaomin1,2，LI Zhongqing1,2，ZHOU Hui1,2，XIE Feiyang1,2，HUANG Haijian3
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1.School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan 232001, China;
2.Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China;
3.Institute of Applied Mechanics, Anhui University of Science and Technology, Huainan 232001, China
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收稿日期
修回日期
出版日期
2018-09-04
2018-11-06
2020-02-28
发布日期
2020-02-15
摘要
以数值模拟方法对500 mm×500 mm×200 mm(长×宽×高)腔体进行分析，发现该腔体具有良好的抑制瓦斯爆炸冲击波的效果。考虑到井下瓦斯爆炸可能引起煤粉二次爆炸，从而进行岩粉、水、MCA粉(三聚氰胺氰尿酸盐)在铺设煤粉条件下耦合腔体的对比试验，从煤粉二次爆炸、爆炸火焰和爆炸冲击波峰值超压的抑制情况来判定抑爆效果。由实验结果，100 g MCA粉和500 g岩粉可完全抑制煤粉二次爆炸，140 g MCA粉和600 g岩粉可完全抑制爆炸火焰，600 g水既不能完全抑制煤粉二次爆炸也不能完全抑制爆炸火焰，100 g的MCA粉、岩粉、水的抑制率分别为24.95％，-10.08％，5.54％。由此得出结论MCA粉耦合腔体各方面抑爆效果最优，岩粉对抑制煤粉二次爆炸和抑制爆炸火焰的性能优于水，水在抑制爆炸冲击波峰值超压的效果优于岩粉。
Abstract
By a simulation analysis on cavity whose dimension is 500 mm×500 mm×200 mm (length×width×height), it turns out to be of a superior suppression effect on shock wave of gas explosion.Given that a subsequent explosion of coal powder can be led to by gas explosion under mines, a comparative test was conducted by selecting rock powder, water mist and MCA (melamine cyanurate) powder as suppressant with coal powder preset.Its suppression effect was judged from aspects of coal subsequent explosion condition, explosion fire and over-pressure of shock wave separately.It is obtained by experiments that subsequent explosion of coal powder can be totally suppressed by 100g MCA powder and 500g rock powder, and the explosion fire can be totally suppressed by 140g MCA powder and 600g rock powder.Besides, neither can 600g water mist totally suppress subsequent explosion of coal powder nor explosion fire.In addition, the suppression rates of MCA, rock powder and water mist at the weight of 100g are 24.95％, -10.08％, 5.54％.In conclusion, the one by MCA powder coupled with cavity shows the optimal effect in all aspects.The rock powder has a better suppression effect on coal subsequent explosion and explosion fire than water mist, while the latter is more advantageous on shock wave suppression than the former.
LIU Wei1,2，MU Chaomin1,2，LI Zhongqing1,2，ZHOU Hui1,2，XIE Feiyang1,2，HUANG Haijian3.
Numerical simulation of cavity elimination mechanism and an experimental study on its combined explosive suppressing explosion[J]. Journal of Vibration and Shock, 2020, 39(4): 88-95
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