The sub-surface exploration carried out in Yayu coal field by China revealed four major lithologic units. These are the basement complex, lower basalt sedimentary rock unit and upper basalt from the older to the younger according to their position in stratigraphic sequence. The lacustrine and fluvitile types are observed in the Yayu coal field. The samples of coal seams are collected from the fresh coal seam in cored boreholes during coal field exploration stage. The proximate, total sulfur, calorific value and ultimate analysis and other chemical analysis were performed. X-ray diffraction (XRD) analysis were performed for coal, coal ash samples. Ashes and coal were identified to mineralogical and petrographic analysis using X-ray diffraction, optical microscopy, and electron microscopy. The laboratory analysis result of the coal samples helped to analyze the quality and rank of the deposit. The result of the study district conclude that there are medium to high volatile, medium to high ash content and relatively, low to medium sulfur content.
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