To achieve high casting blast efficiency, technical parameters such as bench height, angles, diameters and patterns of blasting holes, priming method and delay time should be selected properly.

• 为取得较高的抛爆率,需要注意选择的技术条件包括台阶高度、炮孔角度、炮孔直径、布孔方式、起爆方式及延时选择等。