摘要
五轮山矿区煤层的平均孔隙率为4.79%～5.84%,孔隙结构以过渡孔为主,其次为微孔。煤层气的甲烷平均浓度大于95%,属于典型的干气,煤层含气量为6.26-32.30m^3/t,通用的煤层气风化带确定方法对本区不适合。矿区内同一区域的不同煤层和不同区域的同一煤层,煤层气含气量以及解吸率与煤层挥发分、灰分有不同的关联。这些结果表明五轮山矿区煤层气为多层叠加的独立的含气系统。
Coal seam average porosity in the Wulunshan mine area is 4.79%-5.84%, porous structure is mainly intermediate pores, then larger proportion of micropores. Average methane concentration of CBM is larger than 95%, a typical dry-lean gas. Coal seam gas content is 6.26-32.30m^3/t, commonly used CBM weathering zone determination is not applicable in the area. In the mine area, different coal seams in an identical district and an identical coal seam in different districts have different correlations between CBM content and desorption ratio, volatile matter and ash content. These results have indicated a multilayered superimposing independent gas-bearing system in Wulunshan mine area.
出处
《中国煤炭地质》
2009年第5期34-36,48,共4页
Coal Geology of China
基金
国家自然科学基金项目(40572095)
