Analytical model and application of stress distribution on mining coal floor

被引：4
作者：
ZHU, Shu-yun [1 ]
JIAN, Zhen-quan [1 ]
HOU, Hong-liang [2 ]
XIAO, Wei-guo [1 ]
YAO, Pu [1 ]
机构：
[1] School of Resources and Earth Science, China University of Mining and Technology, Xuzhou
[2] Department of Prevention and Treatment for Coal Mine Water, Zhengzhou Coal Group Ltd Co, Xinmi
来源：
Journal of China University of Mining and Technology | 2008年 / 18卷 / 01期
关键词：
analysis; coal floor; model; stress distribution;
D O I：
10.1016/S1006-1266(08)60003-6
中图分类号：
学科分类号：
摘要：
Given the analysis of underground pressure, a stress calculation model of coal floor stress has been established based on a theory of elasticity. The model presents the law of stress distribution on the relatively fixed position of the mining coal floor: the extent of stress variation in a fixed floor position decreases gradually along with depth, the decreasing rate of the vertical stress is clearly larger than that of the horizontal stress at a specific depth. The direction of the maximum principal stress changes gradually from a vertical direction to a horizontal direction with the advance of the working face. The deformation and permeability of the rock mass of the coal floor are obtained by contrasting the difference of the principal stress established from theoretical calculations with curves of stress-strain and permeability-strain from tests, which is an important mechanical basis for preventing water inrush from confined aquifers. © 2008 The Journal of China University of Mining & Technology.
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页码：13 / 17
页数：4
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