Abstract: Based on the selection of mining technology in a open-pit mine, do some calculation and analysis on the comprehensive energy consumption and the cost of fuel and dynamic of discontinuous mining system and semi-continuous mining system, according to general specification, quota and practical application of equipment. The study showed that the highest ratio of energy consumption and operation cost is the transport link, so it will be the point link on the energy-saving and benefit increase; The point of process optimization for semi-continuous mining system is to reduce or cancel the distance of truck transportation, improve the utilization efficiency of belt conveyor. Under the existing pricing system the operation cost of semi-continuous mining system is better than discontinuous mining system, so it should be extended.

Key words: Open-pit mine, Semi-continuous, Mining system, Energy consumption