Abstract: Based on a large amount of mining data of pingdingshan coal mine district,and with the application of statisti- cal analysis method, this paper searches out main fault factors affecting mining. The optimum fault damaged coefficent is de-vived as well. The paper also studies the statistical prediction method of fault demaged coefficent and its formula. The model of the relation between fault damaged coefficent and mining index is established. The results are helpful to working out, mining design and plans, making relative production quotas and enhancing management.