Horizontal section method for calculating coal reserves
Reserve calculation method
(5) Horizontal section method
The horizontal section method is essentially a type of parallel section method, except that its section is not a vertical plane but a horizontal plane.
Envisions a series of equidistant tangential horizontal plane and the coal layer, is obtained a series of horizontal section different elevations seam, then, calculates adjacent, coal reserves and the volume between the two lower horizontal section.
In the formula, V is the coal seam volume between the upper and lower adjacent horizontal sections; S1 and S2 are the areas of the coal seams on the upper and lower adjacent horizontal cut planes respectively; h is the vertical distance between the upper and lower adjacent horizontal cut planes; d is the coal seam bulk density.
This method is suitable for the calculation of reserves in inclined thick coal seams for open pit mining. The advantage is that the reserves can be calculated and calculated separately according to the height of the open-pit mining stage, which is convenient for the mine design and mining department to utilize.
Intermediates are also called organic intermediates. Use coal tar or petroleum products as raw materials to manufacture intermediate products such as dyes, pesticides, medicines, resins, additives, plasticizers, etc. Because it was originally used to make dyes, it is also called dye intermediates.
Pharmaceutical supplies
Concept
The so-called Pharmaceutical Intermediates are actually some chemical raw materials or chemical products used in the pharmaceutical synthesis process. This kind of chemical product does not require a production license for drugs, and can be produced in ordinary chemical plants. As long as it reaches some levels, it can be used for the synthesis of drugs.
Effect
Pharmaceutical production requires a lot of special chemicals. Most of these chemicals were originally produced by the pharmaceutical industry. However, with the deepening of social division of labor and the advancement of production technology, the pharmaceutical industry has transferred some pharmaceutical intermediates to chemical companies for production. Pharmaceutical intermediates are fine chemical products, and the production of pharmaceutical intermediates has become a major industry in the international chemical industry.
In cell biology, the intermediate refers to the middle part of the gradually disintegrating spindle around the equatorial plane in the late stage of cell division, and the surrounding cytoplasm concentration increases, filling the entire equatorial plane.
Other Intermediates series,2-Chloropyridine-5-Carbaldehyde,5-Bromo-2-Hydroxynicotinic Acid,2-Chloro-5-Fluoronicotinic Acid,Methyl 4 6-Dichloronicotinate
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