Differences in smoldering characteristics of coal piles with different smoldering propagation directions

doi:10.1016/j.firesaf.2018.11.004

CORC > 上海财经大学 > 上海财经大学

	Differences in smoldering characteristics of coal piles with different smoldering propagation directions
	Qi Guansheng 1; Lu Wei 1; Qi Xuyao 2; Zhong Xiaoxing 2; Cheng Weimin 1; Liu Fangming 3
刊名	FIRE SAFETY JOURNAL
	2018-12
卷号	102 页码:77-82
关键词	Coal Spontaneous combustion Smoldering combustion Smoldering characteristics
ISSN号	0379-7112
DOI	10.1016/j.firesaf.2018.11.004
英文摘要	Smoldering combustion frequently occurs in the mined-out gobs of coal mines. This can act as an ignition source, triggering gas explosions and resulting in serious accidents. In this study, a smoldering test device was constructed, in which horizontal, vertical, forward and reverse smoldering combustion experiments were performed to explore the smoldering characteristics (dynamic development process, smoldering rate and temperature, etc.) of a coal pile. It is found that owing to the evaporation moisture present in the coal and its re-condensation on the coal ahead of the smoldering front, a constant temperature of approximately 70-90 degrees C is maintained during the spread of forward smoldering. In the initial stage of reverse smoldering, both the pyrolysis and oxidation fronts exist and propagate backward; meanwhile, in the later stage, the intensity of the endothermic pyrolysis reaction is greatly reduced, resulting that the maximum smoldering temperature of reverse smoldering is slightly higher than that of the forward smoldering. The vertical smoldering temperature is 1.5-2 times that of horizontal smoldering, owing to the poorer oxygen supply in the horizontal spread. The propagation of the oxidation front is extremely slow, and is in the order of 0.1 mm/min; this makes it difficult to characterize and detect the smoldering fire, especially in inaccessible mined-out gobs with complex environments. This study provides useful insights into the identification of smoldering fire and assesses its development stage.
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000453341600009
内容类型	期刊论文
源URL	[http://10.2.47.112/handle/2XS4QKH4/461]
专题	上海财经大学
通讯作者	Zhong Xiaoxing
作者单位	1.Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao 266590, Peoples R China; 2.China Univ Min & Technol, Minist Educ, Key Lab Gas & Fire Control Coal Mines, Xuzhou 221116, Jiangsu, Peoples R China; 3.Shanghai Univ Finance & Econ, Sch Marxism, Shanghai 200000, Peoples R China
推荐引用方式 GB/T 7714	Qi Guansheng,Lu Wei,Qi Xuyao,et al. Differences in smoldering characteristics of coal piles with different smoldering propagation directions[J]. FIRE SAFETY JOURNAL,2018,102:77-82.
APA	Qi Guansheng,Lu Wei,Qi Xuyao,Zhong Xiaoxing,Cheng Weimin,&Liu Fangming.(2018).Differences in smoldering characteristics of coal piles with different smoldering propagation directions.FIRE SAFETY JOURNAL,102,77-82.
MLA	Qi Guansheng,et al."Differences in smoldering characteristics of coal piles with different smoldering propagation directions".FIRE SAFETY JOURNAL 102(2018):77-82.