Toolbox Talks | EH&S- daily maintenance for mining plant ,Toolbox Talks A Toolbox Talk is an informal group discussion that focuses on a particular safety issue. These tools can be used daily to promote department safety culture as well as to facilitate health and safety discussions on job sites.Cost Models of Theoretical Mining Operations | CostMineMining Cost Models Free Data for Mine Cost Estimates Free 5,000 tpd Open Pit Cost Model Other cost models, included in a Mining Cost Service: Open Pit, Underground, Placer, Milling & Heap Leach