Abstract:According to the mining technical conditions and production status of a kaolin mine, in order to analyze the problems of low efficiency, high labor intensity, and subsidence of part of the surface caused by layered caving mining method in a kaolin mine, based on the research and practice results of similar mines in China, two feasible mining processes of upward drift filling method and downward drift filling method were proposed. After the technical and economic demonstration, the more safe, economical and efficient downward approach filling method was chosen. From the economic and technical point of view, the downward drift filling method is selected to be safer, more economical and more efficient. The downward drift filling method is used for layering and filling from top to bottom. The size of the drift is 3.3m×3.3m, and the upper and lower layered extraction drifts are vertically arranged. Ores are dumped by roadway repair machine, transported by mining truck and unloaded to stope chute. The research shows that after the downward drift filling method is adopted, the underground workers are streamlined by 43.7 %, the production efficiency of a single drift is increased by 216 %, and the recovery rate is increased by 14%.