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Shock and Vibration
Volume 2018, Article ID 7082951, 22 pages
https://doi.org/10.1155/2018/7082951
Research Article

Bending Moment Characteristics of Hard Roof before First Breaking of Roof Beam Considering Coal Seam Hardening

1State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
2National Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao 266590, China
3School of Civil Engineering, Qingdao Technological University, Qingdao 266520, China

Correspondence should be addressed to Bangyou Jiang; moc.361@321uoygnabgnaij

Received 4 March 2018; Accepted 4 June 2018; Published 10 July 2018

Academic Editor: Salvatore Russo

Copyright © 2018 Shitan Gu 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.

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