REDUCING THE UPPER WALL CUSP HAZARD AT THE COLONSAY MINE BY MEANS OF CUTTING PROFILE MODIFICATION
Mr Nathan Morgan (Geologist - Mosaic Potash Colonsay)
At the Colonsay mine, the effects of initial stress relief following a new borer excavation are most evident during the first seventy-two hours. Though the resultant ground conditions can be variable, the development of an upper wall cusp is consistent and has proved to be a significant safety risk to our employees. This presentation will summarize the approach that was taken to reduce the upper wall cusp size through the modification of the borer cutting profile.
