The height of the stage shall be determined by comprehensive analysis and comparison according to the conditions of the occurrence of the ore body, the thickness of the ore body, the stability of the ore, the mining and transportation equipment, the production scale, the mining method, etc., and may also be selected according to the following provisions:
1 gently inclined ore body, the stage height can be 20m ~ 35m ;
2 steeply inclined ore body, the stage height can be 40m ~ 60m ;
3 Mining technology conditions are good, mining equipment level is high, using the pillarless caving method, large diameter deep hole mining method and layered filling method of the mine, the stage height can be 80m ~ 150m .

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