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B evaluation (1) advantages
(2) Disadvantages
Applicable conditions and evaluation of the staged forced caving mining method
A applicable conditions
The applicable conditions of the stage forced caving method are basically the same as those of the sublevel caving method. The thickness of the mining body is large, the shape is regular, the dip angle is steep, the surrounding rock is not stable, the ore value is not high, and the surrounding rock contains grade. The body of the ore.
1) The amount of mining work is small.
2) High labor productivity.
3) Mining costs are low.
1) The requirements for mine management are strict, the management is not good, and the loss of ore is depleted.
2) The bulk output rate is high, and the secondary crushing workload is large.
3) The conditions of use are not as flexible as the subdivision method.
(3) Technical and economic indicators. See Table 2 for the technical and economic indicators of the forced caving method in some mines in China.
(4) Evaluation. Compared with the deep hole mining plan, the drug room mining plan is obviously not good in terms of mining quantity and labor productivity, so the drug room mining plan is not used as much as possible. Deep mine off scheme, in particular perpendicular deep mine off scheme is an efficient, safe, low-cost method of mining, Soviet Tashtagol iron ore mining stage forced off the deep-hole caving is a successful example of .