Abstract: The trend of increasing structural parameters of sublevel caving appears along with the application of sublevel caving method in gently inclined mid-thick ore body increasing steadily.The feasibility of using sublevel caving with larger parameters in gently inclined mid-thick ore body has been reviewed both in theory and laboratory.The research showed that the recovery of residual ore at foot wall is the key in exploration of gently inclined mid-thick ore body.In the case of the known ore-body occurrence conditions，the proportion of the footwall residual ore quantity in sublevel stoping ore quantity increases significantly with the increasing of structural parameters.The ore can be recovered sufficiently even if the larger structural parameters pillarless sublevel caving is used in gently inclined mid-thick ore body when enough mining retreating happens.It is feasible for the sublevel caving with larger structural parameters used in gently inclined mid-thick ore body.

Key words: Larger parameter, Sublevel caving, Gently inclined mid-thick ore body, Feasibility research