The loose coefficient, also known as the coefficient of expansion, refers to the ratio of the volume of the ore that is loose after blasting to the original volume of the ore before blasting. The purpose of the determination is to provide information for the mining design and to determine the volume of mine cars, cranes, mines, etc. The calculation formula is:    K=V2/V1 where: K——loose coefficient V2—the volume of the ore after blasting;  V1—the volume of the ore before blasting.
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