辽宁工程技术大学学报（自然科学版）Issue(5)：587-591,5.DOI:10.3969/j.issn.1008-0562.2013.05.003
开采不同厚度上保护层对下伏煤层卸压瓦斯渗流特性的影响
Influence of pressure-relief gas seepage of underlying coal seam with mining different thicknesses of the upper protective layer
摘要
Abstract
To solve problems regarding the influence of pressure-relief gas seepage of underlying coal seam caused by mining different thicknesses of upper protective layer, this paper studied the rules of pressure-relief gas seepage under different conditions of mining upper protective layer. An independently developed solid-gas coupling, physical resemblance simulation platform was used in this study. The experimental result shows that with the working face advance, the gas seepage velocity variation trend first decrease from the original permeability, then increase, then decrease and increase again, then remain the same. The permeability in the gob area eventually is greater than the original one. The result from data processing and curve fitting shows that when the upper protective layer is completely mined out, the permeability change curve along the strike direction of protective layer is in a shape of saddle. With a fixed thickness of the protective layer, the greater the mining height is, the more obviously is the increment of gas permeability relative to the original value after the underlying coal seam reaches a balance state of mining, and the influence area of underlying seam is also larger.关键词
固气耦合/相似模拟/不同厚度/上保护层开采/下伏煤体/卸压瓦斯/瓦斯渗流/渗流规律Key words
solid-gas coupling/similar simulation/different thickness/upper protective layer mining/underlying coal seam/relief gas/gas seepage/seepage law分类
矿业与冶金引用本文复制引用
张少龙,李树刚,宁建民,林海飞..开采不同厚度上保护层对下伏煤层卸压瓦斯渗流特性的影响[J].辽宁工程技术大学学报（自然科学版）,2013,(5):587-591,5.基金项目
国家自然科学基金资助项目 （）
