Abstract: The theoretical feasibility of ore-drawing under ore isolating layer in pillarless sublevel caving was studied and the simulation experiments were carried out using SLS system. The results show that the method is feasible. To reduce the isolating layer's thickness, the alternating convex-concave of the isolating surface is allowed, which will not damage its function. To keep a planar downward movement of the isolating layer between sublevels, the insolating layer's thickness should be increased.

Key words: Pillarless sublevel Caving, Ore isolating layer, SLS system