Citation

Lu Y, Yang F, Wang T, Niu H, Li L, Guo Z. China Saf. Sci. J. 2020; 30(9): 135-141.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn.1003-3033.2020.09.020

PMID

unavailable

Abstract

In order to effectively prevent and control coal spontaneous combustion caused by air leakage in coal fissures of regenerated roof，air leakage flow field was simulated by using Ansys Fluent software. Firstly，a numerical calculation model for it was established considering heterogeneous distribution of porosity. Then，with regenerated roof of 5306 working face roadway in Zhoujing coal mine，Guangxi as an example，numerical modeling was conducted and distribution law of flow field was obtained. Finally，a suitable method to decide risk areas of coal spontaneous combustion in regenerated roof was proposed based on three⁃zone division criterion of coal spontaneous combustion and structural characteristics of regenerated roof. The results show that air leakage flow field is greatly affected by porosity，and would be highly heterogeneous in vertical direction. Its risk areas of spontaneous combustion are mainly distributed in inner side of inlet and return air roadway. © 2020 China Safety Science Journal. All rights reserved.

Language: zh