Application of grey clustering analysis in evaluation of effective supply capacity of coal resources

On the basis of the grey system theory with the evaluation of coal resources,the paper discusses the grey characteristics of evaluation unit of coal resources,analyses the basic principles of evaluation of coal resources with grey cluster,and gives the calculating method in the evaluation of coal resources.Taking 9 evaluation units of coal resources as an example,the comprehensive subjection value was calculated based on 18 evaluation indexes and rating standard(excellent,good,acceptable,poor).The assessment results are obtained as 4 good,4 acceptable,1 poor and the sequence of exploitation is given at last.The results demonstrate that this method is reliable.