福建紫金山金矿露采矿石质量预算方法

结合矿床地质特征和露采工艺特点，通过几何切面分析法建立分析模型图，推导出紫金矿露采矿石质量预算公式。已知矿体平均品位、水平厚度、倾角、边际和围岩品位、采矿台阶高度、开拓方向与矿体走向间夹角、岩矿石安息角、地质矿量等9项参数，且当炮孔倾向与平台推进方向基本平行，矿岩体重也近于一致时，露采矿山可以准确预算出矿品位、贫化率、损失率和出矿量。据此预算结果还可对上述可变参数进行动态分析，以便增加经济和社会效益。

The budgetary method of ore quality of opencast mining in Zijinshan gold deposit,Fujian

Combining with the geological characters of deposit and technological features of opencast mining, the budgetary formula of ore quality of opencast mining in Zijinshan gold deposit was deduced by established the analysis model with the analysis method of geometrical tangent plane. If nine parameters are known: average grade, horizontal thickness and dip angle of orebody, boundary grade, the grade of wall rock, the height of mining platform,the angle between mining direction and orebody trend, still angle of rocks and ores and geological reserves etc., and the dip of drillholes are nearly parallel to the propellant direction of platform, and the density is approximate to that of rock's, the grade, the dilute rate, the loss rate and the quantity of ore can be accurately calculated in opencast mining. Shifting analysis can be proceed to the more variable parameters according to the budgetary result, and economical and social benefits can be raised.