Coal reserves calculation method Fourth, the reserve calculation method There are many methods for calculating reserves, there are about twenty or thirty kinds, but there are only ten kinds of commonly used in coalfield geological exploration, but the most common ones are only two or three. (1) Arithmetic average method "Delineation of ore bodies in the calculation method of coal reserves" (2) Geological block method "Geological block method for calculating coal reserves" (3) Contour method Contour Line Method for Calculating Coal Reserves (4) Section method Sectional Method for Calculating Coal Reserves (5) Horizontal section method "Level Cut Method for Calculation Method of Coal Reserves" (6) Polygonal method "Polygon Method for Calculating Coal Reserves" (7) Triangle method Triangle Method for Calculating Coal Reserves (8) Contour method "Contour method for calculation method of coal reserves" (9) Simple statistical method Simple Statistical Method for Calculating Coal Reserves Air filter,Air clean,Havc Air filter Henan Aklly Filter Engineering Co., Ltd , https://www.akllyfilte.com