Study on the Low-Temperature Oxidation Law in the Co-Mining Face of Coal and Oil Shale in a Goaf—A Case Study in the Liangjia Coal Mine, China

Gang Wang, Yue Wang, Lulu Sun, Xiang Song, Qiqi Liu, Hao Xu and Wenzhou Du
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Gang Wang: Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, Qingdao 266590, China
Yue Wang: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Lulu Sun: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Xiang Song: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Qiqi Liu: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Hao Xu: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Wenzhou Du: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Energies, 2018, vol. 11, issue 1, 1-16

Abstract: The low-temperature oxidation law of coal and rock mass is the basis to study spontaneous combustion in goafs. In this paper, the low-temperature oxidation laws of coal, oil shale, and mixtures of coal and oil shale were studied by using laboratory programmed heating experiments combined with a field beam tube monitoring system. The results from the programmed heating experiments showed that the heat released from oil shale was less than that from coal. Coal had a lower carbon monoxide (CO)-producing temperature than oil shale, and the mixture showed obvious inhibiting effects on CO production with an average CO concentration of about 38% of that for coal. Index gases were selected in different stages to determine the critical turning point temperature for each stage. The field beam tube monitoring system showed that the temperature field of the 1105 co-mining face of coal and oil shale in the goaf of the Liangjia Coal Mine presented a ladder-like distribution, and CO concentration was the highest for coal and lower for the mixture of coal and oil shale, indicating that the mixture of coal with oil shale had an inhibiting effect on CO production, consistent with the results from the programmed heating experiments.

Keywords: coal and oil shale; low-temperature oxidation; programmed heating; goaf; beam tube monitoring system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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