Abstract: The prediction and control method of ore dilution and loss rates is an important component of drawing theory. The available side drawing theory studies only the calculation method for the dilution rate when front wastes are mixed into the drawing body, and fails to realize a prediction and control of the dilution and loss rates in actual production where wastes come into the drawing body from various directions. Therefore, the mechanism of dilution and loss formation in a side drawing process involving wastes coming from various directions is studied. Based on the current dilution rate calculation involving the front wastes mixing, calculation methods for the dilution and loss rates involving the wastes from top, flank and multi-directions are proposed respectively, setting up a complete prediction calculation system for the dilution and loss rates in side drawing.

Key words: Side drawing theory, Draw-out body, Dilution rate, Loss rate