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Shock and Vibration
Volume 2015, Article ID 929836, 11 pages
http://dx.doi.org/10.1155/2015/929836
Research Article

Distribution of Side Abutment Stress in Roadway Subjected to Dynamic Pressure and Its Engineering Application

1School of Mines, China University of Mining and Technology, Xuzhou 221008, China
2Key Laboratory of Deep Coal Resource Mining, CUMT, Ministry of Education, Xuzhou 221008, China

Received 12 September 2014; Accepted 20 December 2014

Academic Editor: Shimin Liu

Copyright © 2015 Yao Qiangling 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

The borehole stress-meter was employed in this study to investigate the distribution of the side abutment stress in roadway subjected to dynamic pressure. The results demonstrate that the side abutment stress of the mining roadway reaches a peak value when the distance to the gob is 8 m and the distribution curve of the side abutment stress can be divided into three zones: stress rising zone, stress stabilizing zone, and stress decreasing zone. Further numerical investigation was carried out to study the effect of the coal mass strength, coal seam depth, immediate roof strength, and thickness on the distribution of the side abutment stress. Based on the research results, we determined the reasonable position of the mining roadway and the optimal width of the barrier pillar. The engineering application demonstrates that the retention of the barrier pillar with a width of 5 m along the gob as the haulage roadway for the next panel is feasible, which delivers favorable technological and economic benefits.