Girard-J; Whyatt-JK; Johnson-J; White-B
Annual Meeting of the Society for Mining, Metallurgy, and Exploration, Inc. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2003 Feb; :1
The choice of fragmentation method is one of the most fundamental aspects of mine design and often has a major impact on the economic viability of an operation. This choice also has health and safety implications. One of the often under-appreciated implications of this choice is the impact on ground control. Alternatives to conventional blasting practices, where viable, can substantially reduce ground control requirements and accidents. These alternatives include mechanical excavation, controlled blasting and preconditioning. They are appropriate, and economic, for different conditions, but all exert more precise control over the level of damage in rock immediately surrounding a new opening. Mechanical excavation is an ideal way to remove rock without overbreak and with minimal damage to the inherent strength of the rock mass. A number of case studies and rock mass classification methods for adjusting ground support to fragmentaiton methods are reviewed.
Mining-industry; Mining-equipment; Safety-measures; Excavation-equipment; Occupational-hazards; Mine-disasters; Rock-mechanics; Rock-bursts; Rock-falls; Case-studies