The means and ways about increasing heap leaching (stope leaching and surface leaching) rate in the heap leaching process such as heap construction,lixiviant sprinkling,pregnant solution collecting and strengthened leaching etc.

This article stresses on designing, arrangement of boreholes concentrated charges, bar charges, selection of blasting parameters, tamping and ini- tating circuits.

Some useful protecting measures and technical means are taken and adopted such as concentrated charge distribution into the bottom of the limekilns and the ash outlet room.

Experimental study on comparabilityof linear and sub-concentrated charge;