双指标出矿管理方法在采场出矿中的应用

Application of Drawing Management Method Using Two-indexes on Drawing of Stope

在无底柱分段崩落法的采场出矿管理中，采用出矿量和截止出矿品位两个指标来确定放矿截止时间。同时，应用磁化率仪测定夹石厚度和快速测定当次品位。实践证明，双指标出矿管理方法取得了较好的效果，能有效地防止丢矿和过贫化的现象。

In the process of a drawing management of stope by sublevel caving method,the stoppedtime of drawing operation is determined based on two-indexes of both drawing volume and cut-offgrade. Simultaneously,the thickness of mixed rock and grade at that time are measured with great speedby magnetic susceptibility instrument. The practice confirms that the two-indexes management methodhave obtained better efficiency with the prevention of ore loss and dilution efficiently.