煤巷瓦斯预排深度数值模拟分析

Numeric analysis of the gas emission lengths of coalwall in the coal drift

利用有限元法对非均质煤层煤巷周围煤体瓦斯运移进行数值模拟分析 ,得出煤巷预排瓦斯带深度不仅与煤的变质程度有关 ,而且与煤层原始瓦斯压力、煤壁暴露时间和煤层赋存地质条件等因素有密切关系 ,最后针对淮南 C1

Through numeric modeling analysis with the method of finite element on the gas flow in non-uniform coal seams of coal drift, it is found that the gas emission limited lengths relates to coal metamorphism, the time of exposure, original gas pressure in the coal seams, occurrence of coal seams, etc. Finally, the formula of the lengths according to the time of exposure and original gas pressure about the Huainan C 13 coal seam is presented.