Preliminary Research on Porous Foam Ceramics against Gas Explosions in Goaf
Gas explosion is one of the most serious accidents threatening the safety of the coal mines in China. The goaf, especially the upper corner, tends to accumulate methane and leak air, which constitutes a potential gas explosion source. Control of the methane in this area remains a concern among coal mine operators. In response to spontaneous combustion that leads to explosion, it is supposed that a porous medium, foam ceramics, be installed in the conjuncture between the working face and goaf according to the Three Zones of spontaneous combustion and high-temperature zone distribution in gob area. Theoretical analysis and experimental research demonstrate that, due to numerous collisions with walls, the foam ceramics can significantly destroy the free radicals generated from chemical reactions in gas combustion, inhibit the heat release, making the chemical reaction not selfsustained. Consequently, flame propagation is suppressed and shock wave attenuated. Given the advantages of foam ceramics of large porosity, high temperature resistance and powerful shock resistance, it is supposed that the foam ceramics be installed properly to isolate the gas explosions in the goaf. However, such installation needs further validation experimentally and on the site.
Spontaneous combustion goaf foam ceramics explosion suppression shock wave
ZHANG Dong NIE Baisheng WANG Chao ZHAO Fei GUO Jianhua LIU Xingna LI Qian LI Hailong ZHANG Chen
China University of Mining & Technology (Beijing), Beijing 100083, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
1462-1468
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）