新疆卡姆斯特煤田西山窑组煤层发育特征与煤质分析

Coalbeds Spread Feature and Coal Quality Analysis in Xishanyao Formation of Kamst Coalfield,Xinjiang

准噶尔盆地东北缘卡姆斯特地区中侏罗统西山窑组为一套辫状河三角洲相沉积，主要可采煤层发育于三角洲平原，其中B1煤层最厚可达11．6m，平均厚度6．1m，厚度稳定、横向连续性好。煤岩显微组分以镜质组为主（73．3％），次为，隋质组（13．3％），另含少量壳质组（6，2％）；无机组分则以碳酸盐矿物为主，另含少量黏土矿物。煤岩镜质体反射率（R0）范围为O．419％～O．522％，媒质，总体以中灰、低硫、特低氯、特低磷、特低发热量的长焰煤为特征。

Xishanyao Formation, locatied in northeast Junggar Basin was sedimented in braided river delta environment, and its upper part contains coalbeds. Much of field work and drilling have been made to deter- mine the coalbed features and quality. It is revealed that coalbed at the top of Xishanyao Formation named B1 coalbed spreads stably both laterally and vertically, with an average thickness of 6.1 m, and the maxi- mum thickness of a single layer up to 11.6 m. The thickness of coalbeds may be more or less controlled by deposition topography and different settlements. The maceral analysis shows that organic components take up 92.8% of the coal, which are mainly constituted by vitrinite（73. 3%） ,secondly inertinite（13.3%）,and last exinite（6.2%）. The inorganic components are mainly constituted of carbonate minerals and some clay minerals. The maximum Ro is 0. 522 %. The the B1 coalbed is generally chracterized by flame coal of medium ash,low sulfur and extremly low phosphorus and chlorine,low heat flame coal after conprehensive analy- sis.