The designed mining and beneficiation capacity is 5,000kt/a. It is the single largest underground phosphate mine in China's chemical industry. New technologies of skip-shaft and auxiliary shaft development and transportation, upward horizontal slicing and filling mining method and upward drift filling mining method, self-gelling hemihydrate phosphogypsum plus tailings paste filling method and so on, are firstly adopted in the chemical mine to realize large-scale safe and efficient mining, which provides a new idea for phosphate mining.