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Mathematical Problems in Engineering - Volume 2016 2016, Article ID 9291412, 12 pages -

Research Article

School of Mines, China University of Mining and Technology, Xuzhou City, Jiangsu 221116, China

Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, Xuzhou 221116, China

Received 30 January 2016; Revised 24 August 2016; Accepted 7 September 2016

Academic Editor: Ibrahim Zeid

Copyright © 2016 Shihao Tu 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

As for the sophisticated advanced support technique of vertical wall semicircle arch roadway in the three-soft coal seam, a design of flat top U-shape roadway section was put forward. Based on the complex function method, the surrounding rock displacement and stress distribution laws both of vertical wall semicircle arch roadway and of flat top U-shape roadway were obtained. The results showed that the displacement distribution laws in the edge of roadway surrounding rock were similar between the two different roadways and the area of plasticity proportion of flat top U-shape roadway approximately equals that of vertical wall semicircle arch roadway. Based on finite element method, the bearing behaviors of the U-type steel support under the interaction of surrounding rock in vertical wall semicircle arch roadway and flat top U-shape roadway were analyzed. The results showed that, from a mechanics perspective, U-type steel support can fulfill the requirement of surrounding rock supporting in flat top U-shape roadway and vertical wall semicircle arch roadway. The field measurement of mining roadway surrounding rock displacement in Zouzhuang coal mine working face 3204 verified the accuracy of theoretical analysis and numerical simulation.





Autor: Shihao Tu, Zhaoxin Li, Zhiwei Ye, Cun Zhang, and Lei Zhang

Fuente: https://www.hindawi.com/



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