Application of the grey system theory for predicting safety andproduction of coal mine

On the basis of actual data of coal mines in china, the grey forecasting model for output per year and the grey forecasting model for death rate per million ton are built by using the grey system theory. It is shown that models which are built have good precisions. Safety and production of coal mine in china are forecasted by using grey forecasting models which are built, and a transformation curve of output per year and a transformation curve of death rate per million ton are obtained. The results show that output of coal has an ascending trend, and death rate per million ton has a degressive trend. Which generally tally with development tendency of coal mine in china.