AMC’s BORE HOLE STABILISER™ significantly improved the blast hole utilisation at the Boddington Bauxite mine in Western Australia by producing firm collars, in-gauge holes and aided drilling to Total Depth (TD).
AMC’s client was conducting drilling for the drill and blast program at the Boddington Bauxite Mine, 120km south of Perth, Western Australia. The formation at the mine consisted mainly of cap rock, with both cemented and loose gravel. Drilling through these varied formations produced inconsistent and unstable holes on a regular basis, which were not able to be accurately installed with explosives.
The foam system previously used by the drilling contractor produced holes that presented well; however they revealed cave-ins and resulted in lost holes. Subsequently, productivity was impacted due to re-drills and recovery of lost equipment.
Each hole required a cylindrical profile and a minimum depth of two metres to be considered acceptable for further use.
- Project produced 30% more ‘acceptable’ holes than previous fluid programs
- Holes were drilled faster and more efficiently with significantly more holes drilled per hour
- Less risk – dramatically firmer collars and greater hole stability
- Enhanced lifting and cleaning of the hole
- A higher percentage of in-gauge holes
- Improved productivity – less reaming and equipment recovery