Abstract: Aiming at the problems such as the threshold of drawpoint spacing and stress distribution in the research of multiple draw interaction， numerical tests based on the rigid block model were carried out under the conditions of different drawpoint spacings and draw modes， and uniform flow and stress evolution laws of caved ore and rock between multiple drawpoints were quantitatively studied. The results showed that the threshold of drawpoint spacing that produces uniform flow of caved ore and rock lies between 1.0 and 1.25 times of the maximum width of the isolated movement zone under the condition of multiple drawpoints. There is an obvious stress arching effect in the particle flow system， and the vertical stress above movement zones gradually transfers to the immobile zones on both sides during the draw process. The maximum vertical stress at the bottom of stope is nearly 1.8 times of the initial vertical stress within the range of values studied. The coordination number within the immobile zones is about 8~9 during the draw process， and the lower the space height， the larger the coordination number is. Within the movement zones， the closer to the drawpoints， the looser the caved ore and rock are， and the more disordered the migration and contact variations among particles are.

Key words: multiple drawpoints; caved ore and rock particles; uniform flow; stress evolution; rigid block model