Large-scale laboratory study on the evolution law of temperature fields in the context of underground coal gasification

Zhe Wang; Yongchao Wei; Tengfei Hou; Yongchuan Jin; Cuilan Wang; Jie Liang

doi:10.1016/j.cjche.2020.07.005

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Large-scale laboratory study on the evolution law of temperature fields in the context of underground coal gasification

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Large-scale laboratory study on the evolution law of temperature fields in the context of underground coal gasification
- Chinese Journal of Chemical Engineering Vol. 28, Issue 12, Pages: 3126-3135(2020)
- Affiliations：
  
  1. School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing),Beijing,China,100083
  2. Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology(Beijing),Beijing,China,100083
  3. Hebei Provincial Coalfield Geology Bureau Geophysical Prospecting & Survey Administration,Xingtai,China,054000
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.07.005
  CLC：
- Published：2020
- Accepted：
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Zhe Wang, Yongchao Wei, Tengfei Hou, Yongchuan Jin, Cuilan Wang, Jie Liang. Large-scale laboratory study on the evolution law of temperature fields in the context of underground coal gasification[J]. Chinese Journal of Chemical Engineering, 2020, 28(12): 3126-3135.
DOI：

Zhe Wang, Yongchao Wei, Tengfei Hou, Yongchuan Jin, Cuilan Wang, Jie Liang. Large-scale laboratory study on the evolution law of temperature fields in the context of underground coal gasification[J]. Chinese Journal of Chemical Engineering, 2020, 28(12): 3126-3135. DOI： 10.1016/j.cjche.2020.07.005.

摘要

Abstract

This article presents the evolution law of temperature fields in a large-scale laboratory Underground Coal Gasification reactions using Ulanqab lignite under actual conditions. The results show that in the cultivation stage of oxidation zone

the main direction of the temperature field expansion is consistent with the crack direction of the coal seam. In the gasification stabilization stage

the main direction of the temperature field expansion is along the channel. The temperature of the coal seam and the overlying rock mass at its interface with the furnace directly above the gasification channel is equivalent to that of the coal seam temperature

and this temperature is much greater than the temperatures observed near both side walls of the gasification channel at the interface. However

temperatures perpendicular to the axis of the gasification channel are similar at a vertical distance of 40 cm away from the interface. The temperature distributions indicate that the transmission of heat through the overlying rock mass is more rapid in the vertical direction than in the horizontal direction. Moreover

some degree of thermal dispersion is obse

rved in the vertical direction near the outlet. The thermal dispersion coefficient is 0.72 and dispersion angle

is 78.7°.

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Related Institution

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