Study of the effect of bacteria on the disappearance and transformation of CO in the sealed fire zone of coal mine

International Conference on Energy Engineering and Environmental Protection 2016

能源学;生态环境科学

Zhai, Xiaowei^1,2 ; Wu, Shibo^1,2 ; Deng, Jun^1,2 ; Yang, Yifan^3 ; Jiang, Hua^1,4 ; Wang, Kai^1,2

College of Safety Science and Engineering, Xi'An University of Science and Technology, Xi'an

710054, China^1

Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi'an

710054, China^2

Environmental Service Center of Clean Development Mechanism in Ningxia Province, Yinchuan

750000, China^3

Department of Mining Engineering, West Virginia University, Morgantown

WV

26505, United States^4

关键词: CO concentrations;    CO2 concentration;    Coal sample;    Coal spontaneous combustion;    Experiment set-up;    Fire zones;    High-temperature environment;    Underground coal mine;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/52/1/012085/pdf
DOI  :  10.1088/1742-6596/52/1/012085

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

When the underground coal mine gob area has been sealed due to the coal spontaneous combustion, under the low oxygen and potentially high temperature environment, the CO concentration could drop sharply and disappear quickly. But it could rise rapidly after re-opening. These indicate that the disappearance is the only index for coal burnt out. In order to find a way how let CO disappear, experiments have been conducted using the newly developed experiment setup for three samples, raw, watered and bacteria-free coal sample. The CO and CO2concentration have been monitored and analyzed. The results show the bacteria in the coal do consume CO and increase the chance of CO transfer to CO2. These results reveal how let CO disappear in a sealed zone from a new aspect. And the accuracy was improved when used gas index to determine combustion status for coal spontaneous combustion.