Discussion on adopting steep slope mining technology at Baiyunebo main quarry;

With safety and reliability,the new mode sustains steep slope mining,increases the angle of ultimate slope,and reduces 3%～5% of noneffective overburden amount.

Discussion on sectional mining,technical feasibility and economic rationality of steep side expansion of Guangou quarry is made and some issues to be noted are proposed due to the problems existing in the design and mining of the quarry,such as large stripping volume in the initial mining stage and voriation in stripping ratio during mining.

Vibrating Effect of Blasting in Open-pit Slope;

With the combined opencut of gold ore and copper ore in Zijinshan gold-copper mine as engineering example,the "transverse direction-steep slope" scheme is compared with the traditional scheme of "longitudinal direction-gentle slope" in the aspect of technical economy.