Mechanics mechanism of rock burst caused by mining in the variable region of coal thickness

被引：0

作者：

Zhao T.-B. ^{[1
,2
]}

Guo W.-Y. ^{[1
,2
]}

Tan Y.-L. ^{[1
,2
]}

Zhang Z. ^{[1
,2
]}

Cheng K.-K. ^{[1
,2
]}

机构：

[1] State 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

[2] School of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao

来源：

Guo, Wei-Yao (363216782@qq.com) | 1659年 / China Coal Society卷 / 41期

关键词：

Energy transmission; Mechanism; Rock burst; Variation of coal thickness;

D O I：

10.13225/j.cnki.jccs.2015.1475

中图分类号：

学科分类号：

摘要：

Rock burst is prone to easily occur during mining in the geological structural area. Thus, the mechanical model of coal-rock combination is established, the influences of coal thickness variation on the distribution characteristics of abutment pressure and the evolution law of impact energy are studied, and the rock burst's mechanism of mining in the variable region of coal thickness is revealed. Results show that the in-situ stress in the thinning area is larger than that in the thickening area, and the stress gradient increases with the increase of coal thickness reduction rate or elastic modulus ratio between rock and coal. When mining from thick to thin seam, the abutment pressure shows a “double peak” distribution, but when mining from thin to thick seam, the abutment pressure shows a “single peak” distribution. When mining from thick to thin seam, the high-energy area formed by the second peak stress area will hinder the energy from transmitting into the deep coal wall, which will cause the impact energy mainly release into roadways or working faces, but when mining from thin to thick seam, the impact energy can transmit into the deep coal wall, and the disaster's influencing scope is small. Field case analysis and field application show that mining from thin to thick seam is advantageous to control the rock burst. © 2016, Editorial Office of Journal of China Coal Society. All right reserved.

引用

页码：1659 / 1666

页数：7

共 17 条

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