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《Coal Science and Technology》 2014-12
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Study on Coal Reservoir Features and Gas Distribution Law in Lu'an Mining Area

LI Yang;ZHANG Lang;SHU Long-yong;TANG Wen-jie;Safety Branch of China Coal Research Institute;State Key Laboratory of Coal Resource High Efficient Mining and Clean Utilization(China Coal Research Institute);Beijing Mine Safety Engineering Technology Research Center;Shanxi Lu'an Mining Industry Group Corporation Limited;  
In order to obtain No. 3 coal seam reservoir features and gas distribution law in Lu'an Mining Area,the seam reservoir features were systematically analyzed from the seam depth,coal metamorphism degree,seam permeability,coal adsorption features,coal structure and other aspects. Based on the circumstances,the quantitative relationship of the coal gas content and seam depth,coal metamorphism degree,seam moisture and ash content were studied,a seam gas content model was established and the distribution law of the seam gas content was obtained. The results showed that No. 3 seam in Lu'an Mining Area with high in thickness,stable in deposition,deep the depth,high in metamorphism degree,large in Langmuir volume and low in Langmuir pressure would be favorable to the gas enrichment deposition in the seam. In the mining area,there were many developed broken coal and broken partical coal,and partially mylonite coal. The coal structure was broken,the seam permeability was poor,the permeability was lower than the domestic average level and a gas drainage and utilization of the seam would be high difficult. Under the same seam depth condition of each block,the gas content in the north part of Changzhi Block would be highest,the gas content in the south part of Xiangyuan Block would be second and the gas content in the middle part of Lu'an Block would be the lowest.
【Fund】: 国家重点基础研究发展计划(973计划)资助项目(2011CB201206);; 国家科技重大专项资助项目(2011ZX05040-001)
【CateGory Index】: TD712
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