The mining sequence in the middle stage of the mine field is either down-and-down. The down-drilling sequence is the first mining method, the lower mining phase, and the mining method from the top to the bottom (or several stages simultaneously, but the upper stage leads the lower stage). The upside is the opposite.
In the production practice, the down mining order is generally adopted. Because the down-type mining has the advantages of small initial investment, short construction time, fast production, and gradual mining, it can further explore the advantages of deep ore bodies to avoid waste.
In the production practice, the down mining order is generally adopted. Because the down-type mining has the advantages of small initial investment, short construction time, fast production, and gradual mining, it can further explore the advantages of deep ore bodies to avoid waste.
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