Discussion on technical requirements of granite mining
Generally, when the production stripping ratio is about 0.3, the lowest economic waste rate of granite ore is 15% ~ 25%.
(1) When the height of steps in the mine field adopts truck crane, the height of steps is 4 ~ 6m, and the height of steps is less than or equal to14m; ; Large mast crane with step height less than or equal to 62m. The slope angle of steps is generally 90, and the final slope angle is determined according to the stability of rocks.
(2) The width of bar stone is determined according to the performance of mining equipment, specifications of raw materials and fracture conditions, and is generally 1 ~ 3m.
(3) The length of artificial mining face is generally 5 ~15m; Flame cutting machine mining is generally 15 ~ 20m. Minimum working platform width: generally 20 ~ 25m.
Generally speaking, the current mine reclamation work is mainly in the state of semi-mechanical and semi-manual mining, which has not yet formed a certain scale and lacks unity and systematicness in management.
Discussion on technical requirements of granite mining
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