cut-off grade drawing 截止品位放矿
Current cut-off grade drawing 现行截止品位放矿
current cut off grade drawing 现行截止品位放矿
existing cut-off grade drawing 现行截止品位放矿
cut off grade ore drawing 截止品位放矿
extreme cut-off grade ore drawing 极限截止品位放矿
combined cut-off grade ore drawing 组合截止品位放矿
cut-off grade of ore drawing 放矿截止品位
It is concluded that location of foot-wall drawing points are closely related to orebody dip, cut-off grade and ore grade of wall rock.
认为下盘放矿点位置与矿体倾角、放矿截止品位、围岩含矿品位有着密切的关系。
When dilutionless drawing cann't be executed in one step, low dilution drawing can be used and the cut-off grade can be gradually raised towards dilutionless drawing.
当不能一步到位地施行无贫化放矿时，可用低贫化放矿，逐渐提高截止品位而趋向无贫化放矿。
Cut-off grade method has been used to control the ore drawing in non-pillar sublevel caving mining both in and outside China.
采用无底柱分段崩落采矿法，国内外一直采用截止品位放矿法来控制出矿。
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