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
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
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.
刘伟1,2，穆朝民1,2，李重情1,2，周辉1,2，谢飞杨1,2，黄海健3. 腔体消波机理数值模拟及其耦合抑爆剂抑制爆炸试验研究[J]. 振动与冲击, 2020, 39(4): 88-95.
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. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(4): 88-95.
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