In principle the Partings that are contained in the coal layer must be removed/cleaned from the surface of coal.• How to clean partings as the process cleaningtersebut above,• Cleaning of partings are not allowed take/waste too much coal.• In certain circumstances, where there is no layer of partings that lends itself cleaned completely or when cleaning is too much compromising coal partings are missing (for example because the structure of coal and partingnya), then the limit of maximum tolerable to the partings not disposed is approx 10 cm. When the condition occurs before the coal getting done, as soon as possible to the company to report it requested approval of it.
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