Citation

Xiong Y, Kong D, Yang S, Wu G, Zuo Y, Cheng Z. China Saf. Sci. J. 2022; 32(3): 144-151.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.03.020

PMID

unavailable

Abstract

In order to ensure safe and efficient mining on steeply inclined working faces, a stability evaluation index system of steeply inclined coal faces was constructed with quantified grade intervals on the basis of AHP method. Then, a standard stability cloud model based on cloud theory was established. With working face 3402 as an example, its coal face stability evaluation cloud image was generated, and similarity between this image and grades of cloud model was calculated through Dice coefficient to effectively identify stability and verify scientificity and validity of the model. The results show that the main influencing factors of coal face stability in steeply inclined seams are roof pressure at the face of mildly inclined ones, coal body cohesion and mining height, as well as inclination angle of coal seam and pseudo-inclination angle of working face. According to cloud model's identification, similarity between evaluation cloud image and standard grades for general stability indexes of 3402 working face is 0, 0. 345 3, 0. 787 2 and 0 respectively. It can be concluded that its stability is at level III, an unstable state, which is basically consistent with actual situation, demonstrating that the proposed model is scientific and effective to some extent. © 2022 China Safety Science Journal. All rights reserved.

Language: zh