Study on Characteristics of Coal Quality and Coal Forming Environment in Xian'an Coalfield
Element analysis and coal petrology and coal quality analysis are carried out on the drill coal samples of Heshan Formation in Xian'an Coalfield,the results show that:The coal sample of Heshan Formation in Xian'an coalfield is extremely low total moisture,extremely high ash,high volatile content and extremely low fixed carbon coal.The mainly organic component is vitrinite,containing a small amount of inertinite and no chitinite.Vitrinite is dominated by matrix vitrinite,with homogeneous vitrinite and structural vitrinite occasionally seen.Clastic inertinite and semifusinite are occasionally seen in inertinite.The mean value of total organic matter is 30.18%.The inorganic component is mainly clay.The coal of Heshan Formation was mainly formed in the anoxic reduction environment of the warm and humid marine and continental transitional phase.
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