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Shock and Vibration
Volume 2015, Article ID 750807, 10 pages
http://dx.doi.org/10.1155/2015/750807
Research Article

Control Mechanism of Rock Burst in the Floor of Roadway Driven along Next Goaf in Thick Coal Seam with Large Obliquity Angle in Deep Well

1The Key Laboratory of Safe and High-Efficiency Mining of Ministry of Education, Anhui University of Science and Technology, Huainan, Anhui 232001, China
2State Key Laboratory of Mine Disaster Prevention and Control Cultivation Base, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
3School of Resources and Environmental Science, Chongqing University, Chongqing 400044, China
4School of Civil and Environmental Engineering, Beijing University of Science & Technology, Beijing 100083, China

Received 27 January 2015; Revised 10 May 2015; Accepted 11 May 2015

Academic Editor: Vadim V. Silberschmidt

Copyright © 2015 Yunhai Cheng 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

This paper deals with the theoretical aspects combined with stress analysis over the floor strata of coal seam and the calculation model for the stress on the coal floor. Basically, this research presents the relevant results obtained for the rock burst prevention in the floor of roadway driven along next goaf in the exploitation of thick coal seam with large obliquity in deep well and rock burst tendency. The control mechanism of rock burst in the roadway driven along next goaf is revealed in the present work. That is, the danger of rock burst can be removed by changing the stress environment for the energy accumulation of the floor and by reducing the impact on the roadway floor from the strong dynamic pressure. This result can be profitable being used at the design stage of appropriate position of roadway undergoing rock burst tendency in similar conditions. Based on the analysis regarding the control mechanism, this paper presents a novel approach to the prevention of rock burst in roadway floor under the above conditions. That is, the return airway is placed within the goaf of the upper working face that can prevent the rock burst effectively. And in this way, mining without coal pillar in the thick coal seam with large obliquity and large burial depth (over a thousand meters) is realized. Practice also proves that the rock burst in the floor of roadway driven along next goaf is controlled and solved.