Polygon method for calculating coal reserves

Reserve calculation method

(6) Polygonal method

The essence of the law is to calculate the reserves in the block controlled by the coal point in each project, as shown in Figure 2-8-19.

Each exploration area has multiple coal-seeking engineering points. The adjacent project points are connected by dotted lines, and the vertical bisectors are connected. The intersection points of the bisectors are connected by solid lines to form each project. See the polygon with the coal point as the center. Multiply the polygon area by the thickness and the bulk density of the coal point in the polygon to obtain the reserves of the coal seam within the area controlled by each coal engineering point. Add all the polygon reserves. It is the total reserves of its coal seams.

The method has the advantages that the method is simple and the operation is fast, and different coal thickness, ash, coal quality and other indicators can be separately calculated and counted according to requirements. However, the shape of the coal seam is seriously distorted, so it is not applicable to the exploration area where there are few coal engineering points. It is only applicable to the change of coal seam thickness and coal quality index, and the structure is simple, the production is gentle, and the coal project point is not Small but irregularly arranged areas.

Twin Shaft Concrete Mixers

The mixing arm drives the mixing blade to force the mixing of the material in the tank body, the mixing effect is very strong, and the mixing quality is better.There are two steel bearing protection circles between the mixing arm and shaft.to prevent coarse sand.In the steel circles there is a airway. When certain pressure of air goes though it,a pressure protection mat will be formed between the interface of the mixing arm and shaft to prevent water and mud from close to shaft head and prolong the service life of the mixer.