A CASE STUDY ON LONG HOLE RAISING BY SHOOTING TO RELIEF HOLES
(Central South Institute of Technology; Hengyang 421001)
Abstract: A case study was conducted on long hole raising by shooting to relief holes, the results showed that some advanced technology indexes such as the advance of each blasting round arrived at 7～9 m in a 9 m×3.5 m large area raise have been obtained. In addition, rules were recommended for planning the raising technique.
Key words: long hole raising shooting relief holes