近年来,在多峒室、多排炮的大爆破中,特别是推广使用铁质脚线雷管之后,直接引起爆破网路的负载加大。在这种情况下,继续沿用两相或两线供电进行大爆破作业,在技术上可能遇到某些困难,尤其是当电源距离爆破场地较远、输电线的电阻较大时,大型爆破有时甚至不可能。因此,有些矿山 In recent years, many rooms, multi-row cannon blasting, in particular the promotion of the use of iron footer detonator, the direct result of increased load on the burst network. Under such circumstances, the continued use of two-phase or two-wire power supply for large blasting operations may encounter certain technical difficulties, especially when the power supply is far away from the blasting site and the resistance of the transmission line is relatively large. Large-scale blasting sometimes Not even possible. Therefore, some mines