Abstract
As Saskatchewan potash mines grow in age and size, mining reaches greater depths. The stress-relief design principals which were empirically derived at shallower depths are beginning to show fault. Nutrien Vanscoy Potash has began to encounter new ground support and panel design challenges which were previously had negligible effect. While the initial reaction was to reduce extraction and implement distance buffers between operating machines, it eventually became clear that these would only provide short term relief and that in order to continue safely and efficiently mining broad areas, a fundamental change in the mine design would provide the long-term protection required. Presented is a case study with an overview of the challenges encountered at Vanscoy Potash in areas of greater depth along with an account of the design changes considered, implemented and recommended for future success.