Determination of compressive strength of ore and near-rock surrounding rock
Determination of compressive strength of ore and near-rock surrounding rock  Determination of compressive strength is the basis for mining design, generally in specialized laboratories.æ ·å“ The samples required for the determination of compressive strength are usually taken in the surrounding rock of the ore layer and the top and bottom plates, or taken according to the ore and surrounding rock of different hardness. Each type is 2-3, and the specification is 5×5×5cm3. Take two samples and carry out pressure test on parallel level and vertical level. 
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