重庆地区须家河组为一套砂岩、泥岩、砂质泥岩、粉砂岩和煤层组成的湖滨-三角洲型沉积,煤质分级主要为中灰(特低灰-高灰)、低硫(特低硫-中高硫)、高热值(低热值-特高热值)煤；灰分与硫分等值线分布较为相似,总趋势为北东-南西向展布,呈不规则条带状和团块状分布；原煤灰分值与发热量值呈负相关性,浮煤灰分值与发热量值呈正相关性,初步得出同一采集点原煤和浮煤的灰分与发热量的相关性正好相反,煤类分布与挥发分等值线展布相似的结论.%The Xujiahe Formation in the Chongqing area is a set of sandstone, mudstone, sandy mudstone, siltstone and coal seams composed lacustrine shore-deltaic deposit. Coal quality is mainly medium ash (extra-low to high ash), low sulphur (extra-low to medium-high sulphur), high heat value (low to extra-high heat value) coal. Isolines of ash and sulphur contents are similar, main trend NE-SW extending, present irregular banded and massive distribution. Raw coal ash contents and calorific values present negative correlation; while in float coal positive correlation. For a same sampling point, preliminary conclusion of raw coal and float coal ash contents and calorific values correlation is on the contrary, while coal rank distribution and volatile matter isoline extending are similar has worked out.
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