Based on complicated mining conditions and serious mine disasters in Huaihe basin, soft and low permeability coal seam group and gas mining, study like deep alluvium more than 1 000 m deep shaft modernized coal mine shaft group, mining under railways, villages and water bodies and special mining, deep soft rock roadway surrounding rock control, mine multi-source prevention and control of water disasters, green and safe mining is developing, which forms a set of coal safety green mining technology system, in order to realize safe and green mining, the lower limit of mining should be settled, green reserves of coal resources should be clear, all material circulation economy theory, trinity study means and basic scientific research provide theory and technology guarantee for green mining.