1. The estimation scope of resource

1. The estimation scope of resource reserves: within the coal seam mining scope, the shallow part reaches the bottom boundary of each coal seam wind oxidation zone, and the deep part reaches the coal seam-750 m.2. According to the standards for chemical and power coal in the Code for Geological Exploration of Coal Resources, the minimum recoverable thickness of coal seam for calculating available reserves is 0.7m, and the ash content of raw coal is not more than 40%.3. Calculation thickness of reserves: when the thickness of rock inclusion is not more than 0.05m, the calculation shall be combined with coal stratification; When the total thickness of rocks in coal seams with complex structures does not exceed 50% of the thickness of each layer, the total thickness of each layer of coal seams shall be used as the thickness for reserves calculation.4. The main coal seam in the mine field is stable, the thickness changes little, the occurrence of coal seam is relatively gentle, the exploration project is evenly distributed, and the geological block method is adopted.5. 8 the density of coal seam is 1.4tm 3.6. The classification of resource reserves is based on the degree of feasibility study, the economic significance of resource reserves and the geological reliability of resource reserves.