Strength of stratified rock mass beneath hard rock pillars

摘要

A simplified method for stratified floor strata ultimate bearing capacity (UBC) assessing, in room-and-pillar mining conditions, is presented. The physical problem consists of the following two different cases of rectangular rigid pillar of size BxL resting on a two-layer floor system: (a) with the upper weaker layer of thickness H overlying a stronger, infinite rock deposit, or (b) with stronger upper layer resting on infinite weaker rock deposit..