The physical and mechanical test samples of rock and ore should be examined in detail or the physical and mechanical test samples of rock and ore should be collected in the exploration area. The type and location of the sample should be selected according to actual needs. Samples should be representative, mainly at the first mining level or the first stage of mining. The measurement items include humidity, blockiness, porosity, looseness coefficient, natural angle of repose, and the compressive, shearing and tensile strength of the surrounding rock of the top and bottom of the ore body, and are tested according to current regulations and regulations.
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