A: The steep mining is to work on some steps, some of the steps are temporarily not working, the working steps and the temporary work steps are not used for mining, so that the working angle is steeped to delay the stripping of some rocks.

Its main advantages include:

1. The amount of infrastructure and rock extraction and infrastructure investment is small, the construction time is short, the production is early, and the production is fast.

2. It can slowly strip a large number of rocks, reduce the stripping ratio in the early stage of open pit mining, and help to balance the production stripping ratio and reduce the peak of stripping ratio.

3. Delay the exposure time of the final slope and reduce the maintenance workload and cost of the final slope.

Its main disadvantages include:

1. The mining equipment is frequently moved up and down, affecting its production capacity; 2. The transportation road has a large workload;

3. The amount of auxiliary works in the stope is large; 4. The management work is strict.

Assignment style:

1. Work to help the steps to take turns in turn; 2. Work to help the steps to take turns in turn;

3. Step tail mining; 4. Parallel blasting and mining.

Applicable conditions: 1. Applicable to mining ore body with large dip angle; 2. Ore body with large rock cover; 3. Ore body with small and large shape; 4. Open pit mine before mining and peaking period; 5. The larger the specification of the mining equipment, the more favorable it is to realize the step-by-step rotation mining and the grouped round mining in the work, and it is easy to increase the working angle.

Structural parameters: 1. working gang and work sloping angle; 2. stripping strip width; 3. length of mining section; 4. pit bottom parameters.

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