Experimental research on inhibition performances of the sand-suspended colloid for coal spontaneous combustion |
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Authors: | Yong-liang Xu De-ming WangLan-yun Wang Xiao-xing ZhongTing-xiang Chu |
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Institution: | a School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China b School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract: | Serious mine fire disasters have occurred in Northwest China where there are abundant coal resources. For the shortage of water and loess, a large cost of conventional grouting slurry is needed. However, plenty of sand and fly ash resources have been found there. In order to improve the quality of sand injection and reduce the wastage of water during grouting, a kind of new compound material of sand-suspended colloid, which is composed of mineral inorganic gel and organic polymer, was developed in this paper. And the inhibition performance experiments of the sand-suspended colloid were carried out. The results show that the sand-suspended colloid efficaciously affected the oxidation characteristics above the critical temperature during the acceleration oxidation of the lignite and fat-gas coal samples and restrained the oxidation course by increasing the activation energy, so that it reduced the contents of CO and C2H4 and depressed the oxidation rate during the coal spontaneous combustion, and finally inhibited the coal spontaneous combustion. |
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Keywords: | Sand-suspended colloid Temperature programmed Coal spontaneous combustion Inhibition performance |
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