Sources of underground CO: Crushing and ambient temperature oxidation of coal |
| |
| Institution: | 1. Mechanical Engineering Department, The Technical University of Istanbul, Turkey;2. School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, QLD 4072, Australia;3. B3 Mining Services Pty Ltd, Kenmore, QLD 4069, Australia;1. State Key Laboratory of Coal Resources and Safety Mining, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China;2. Key Laboratory of Coal Methane and Fire Control, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China;3. School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China;4. Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore;5. Department of Civil & Environmental Engineering, University of Alberta, Edmonton T6G 2W2, Canada;1. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China;2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China;3. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China;4. State Key Laboratory of Coal Mine Safety Technology, Shenyang Branch of China Coal Technology & Engineering Group, Shenyang 110016, China;1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, Tianjin University, Tianjin 300350, China;2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, Jiangsu Province, China;3. State Key Laboratory of Coal-based Low Carbon Energy, Enn Technology and Development Co. Ltd., Langfang 065001, Hebei Province, China;1. School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), Xi’an, 710054, PR China;2. Shaanxi Key Laboratory of Prevention and Control of Coal Fire, XUST, Xi’an, 710054, PR China;3. Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan;1. School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou 221116, China |
| |
| Abstract: | As a harmful gas in underground coal mine, CO seriously threatened the safety of miners. Currently, the spontaneous combustion of residual coal in goaf is generally considered as the main source of underground CO. CO gas is also widely used as an indicator gas in fire prediction in mines. However, high concentrations of CO are also detected in some mines without spontaneous combustion of coal. Therefore, in the paper, with four ranks of coal, we studied other two potential CO sources: crushing and oxidation at ambient temperature. The more completely crushed coal produces more CO. The concentration of generated CO is inversely proportional to moisture content in coal. Therefore, the addition of water can inhibit the generation process of CO during the crushing process of coal. Lignite with low metamorphic grade can be oxidized to produce CO at ambient temperature (25 °C), and anthracite with high coal rank can be only oxidized to produce CO at 60 °C. Infrared spectra indicated that the coal with rich aliphatic hydrocarbons and oxygen-containing functional groups are more susceptible to oxidation at room temperature. Moreover, the smaller particle size of coal is more beneficial to the oxidation at ambient temperature to generate CO. CO generation during coal oxidation is also closely related to the ventilation rate. |
| |
| Keywords: | CO Underground coal mine Coal crushing Ambient temperature oxidation Spontaneous combustion |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
