Abstract: The production capacity of the concentrator of Miaogou Iron Mine was increased from original 1.22 million t/a to the current 1.90 million t/a at the end of 2008. In view of this, the mining status of Miaogou mine is analyzed in depth. It is pointed out that the 1.54 million t/a mining capacity of the current development system is far from meeting the need of the newly added capacity of the concentrator. A plan for optimizing the development system is proposed from four aspects, the development of the ramp from the east wall, the development of permanent ore-transport road, the selection of the development mode for the hanging wall and footwall south of Line 0 and the transformation of the east dumping site. The implementation and the expected economic results of this optimization plan are described briefly.

Key words: Optimization of development system, Design plan, Cost reduction