Abstract: In order to ensure the remnant ore resource recycle in the group of mined-out area,the composite index classfication method is adopted to do evalution on the unstability of the group of mined-out area.To be specific,the geological factors,mining technical conditions,the comprehensive factors of remnant ore resource recycle are regarded as the analysis indexs to evaluate the risk degree of unstability of the group of mined -out area before and after recycling the remnant ore resources.The evaluation results in this paper can provide guidance basis for recycling the remnant ore resource,besides that it can be taken as the reference for recycling remnant ore in similar mines.

Key words: Recycling of the remnant ore, Unstability of the group of mined-out area, Composite index analysis classification method