Reasonable width of waterproof coal pillar under the condition of different fault dip angles

被引：0
|
作者：
Peng, Wen-Qing [1 ]
Wang, Wei-Jun [1 ]
Li, Qing-Feng [1 ]
机构：
[1] Hunan Province Key Lab of Safety Coal Mining Technology, School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2009年 / 26卷 / 02期
关键词：
Aquifers - Fluid mechanics - Coal mines - Waterproofing - Metal recovery;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Using the Mol-Coulomb rule, we calculated the critical angle of water-burst fault to determine the reasonable width of waterproof coal pillar under different fault dip angles. Based on the stability of coal pillar underground a certain pressure and on the relationship of water conducting fractures with fault and aquifer, we obtained the formula for calculating the width of waterproof coal pillar by applying the theory of elastic-plastic limited equilibrium, the theory of fluid mechanics and on the basis of this formula, the waterproof coal pillar's width of Tuo shan mine is calculated by MATLAB, with the width of coal pillar being shortened by 4 m, not only ensuring the safety production but also increasing the the recovery ratio of coal.
引用
收藏
页码：179 / 182
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