Method for evaluation of the cleanliness grade of coal resources in the Huainan Coalfield,Anhui,China:a case study
Guangqing Hu1
Guijian Liu2
Dun Wu1
Wenyong Zhang3
Biao Fu2
1.School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,Anhui,China;Green Mining Engineering Technology Research Center of Anhui Province,Exploration Research Institute,Anhui Provincial Bureau of Coal Geology,Hefei 230088,Anhui,China2.School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,Anhui,China3.Green Mining Engineering Technology Research Center of Anhui Province,Exploration Research Institute,Anhui Provincial Bureau of Coal Geology,Hefei 230088,Anhui,China
摘要：Based on analysis of a large data set and supplementary sampling and analysis for hazardous trace elements in coal samples from the Huainan Coalfield,a generalized contrast-weighted scale index method was used to establish a model to evaluate the grade of coal cleanliness and its regional distribution in the main coal seam (No.13-1) The results showed that:(1) The contents of Cr,Mn and Ni in the coal seam are relatively high and the average values are greater than 20 μg/g.The contents of Se and Hg are at a high level while most other trace elements are at normal levels.(2) The cleanliness grade of the coal seam is mainly grade Ⅲ-Ⅳ,which corresponds to a relatively good-medium coal cleanliness grade.However,some parts of the seam are at grade Ⅴ (relatively poor coal cleanliness).(3) Coal of relatively good cleanliness grade (grade Ⅲ) is distributed mainly in the regions corresponding to the Zhuji-Dingji-Gubei coal mines and in the eastern periphery of the Panji coal mine.Coal of medium cleanliness (grade Ⅳ) is distributed mainly in the regions of the Panji-Xiejiaji and Kouzidong coalmines.Relatively poor grade coal (grade Ⅴ) is distributed in the southwest regions of the coalfield and the contents of Cr,As and Hg in coal collected from the relatively poor coal cleanliness regions often exceed the regulatory standards for the maximum concentration limits.
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论文发表日期：2021-12-30
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：13( 534-546 )
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