Citation

Zhong T, Li Z, Liu X, Song D, Feng P, li D. China Saf. Sci. J. 2020; 30(10): 96-104.

Copyright

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

DOI

10.16265/j.cnki.issn1003-3033.2020.10.014

PMID

unavailable

Abstract

In order to optimize layout of roadways in sublevel fully mechanized caving mining of near-vertical and extremely-thick coal seam, with mining project of near-vertical coal seams in Wudong coal mine as engineering background, theoretical analysis, numerical simulation and other methods were adopted to study distribution law of surrounding rock stress and displacement as well as stability of whole-coal and semi-coal roadways. Stress concentration of surrounding rock for roof side roadway was significantly higher than that for floor side one. In case of whole-coal roadway, its deformation was greater while stress concentration was relatively lower, and deformation of surrounding rock made a leading factor that affects its stability. However, for semi-coal roadway, stress of surrounding rock became a major factor as deformation of roadway was smaller while stress concentration is relatively higher. The results show that with deformation, stress concentration and stability control of surrounding rocks taken into consideration, a whole-coal roadway without retained coal skin would be a better option for near-vertical and extremely-thick coal seams. © 2020 China Safety Science Journal. All rights reserved.

Language: zh