Ore waste segregation blasts
Most metalliferous mines blast separate trim and production blasts, with a presplit fired either separately or together with the trim blast. The trim blasts are traditionally designed for so-called “maximum burden relief” and have fewer rows of blastholes than the production blasts. They are also generally fired to an unobscured, or unchoked, free face. This practice introduces several productivity penalties including lost production time due to the additional trim blasts, scheduling constraints and lost production due to the need to completely excavate broken rock in front of the blasts to form a free face.
We have experience and help you to fire blasts by allowing enough time in between midsplit, trim and production blasts. This has been successful at several mine sites.
Dilution control
- Dilution of ore waste can be dramatically reduced by locating ore waste boundaries and then initiating blast from multiple initiation points. This has been implemented resulting into significant gains.
- Increased ore dilution due to the excessive muckpile movement arising from narrow trim blasts with free faces can be controlled thereby controlling dilution.