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Advances in Civil Engineering
Volume 2018, Article ID 4183748, 15 pages
https://doi.org/10.1155/2018/4183748
Research Article

Discrete Element Simulation of Roadway Stability in an Efflorescent Oxidation Zone

1Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
2School of Safety Engineering, North China Institute of Science and Technology, Sanhe, Hebei 065201, China

Correspondence should be addressed to Nong Zhang; nc.ude.tmuc@gnongnahz

Received 10 November 2017; Accepted 12 March 2018; Published 2 May 2018

Academic Editor: Rihong Cao

Copyright © 2018 Qifeng Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Due to crustal movement, coal-bearing strata weather and oxidise when exposed to the atmosphere and water. The unique geological characteristics of the rock in efflorescent oxidation zones lead to variations in lithology, weak rock, and large failures due to deformation. This paper analyses the variable physical mechanics and microstructural characteristics of efflorescent-oxidised coal rock using the UDEC numerical simulation software. The software is used to study the gradual development, dynamic expansion, and deformation of cracks in the material surrounding efflorescent rock tunnels. These numerical simulations reveal information concerning the evolution of surrounding rock attenuation, strength, and deformation. The destruction and causes of roadway failure were also analysed, and optimisation measures were proposed. The results from this study have applications for other research concerning roadway failure, deformation mechanisms, and the addition of appropriate supports.