The Hole Covers are used to reduce the number of lost blastholes as a result of collar collapses, water ingress and debris blockages.
With the cones:
The Hole Covers are available for blasthole diameters ranging between 3 inch (76mm) to 12.25 inch (311mm).
The Hole Covers are used throughout blast block preparation. Once blastholes are drilled, the cones are inserted into the holes to maintain hole collar integrity and to keep debris out.
Before priming and charging, the Hole Cover is removed temporarily, and re-inserted once priming and charging has been completed.
The cone is then left in the hole, preventing any debris or collar collapses before stemming takes place. When the blast team is ready to stem, the cones are removed and stored for future use.
65mm (top) x 125mm (bottom) x 190mm (height)
118mm (top) x 215mm (bottom) x 260mm (height)
125mm (top) x 193mm (bottom) x 335mm (height)
90mm (top) x 295mm (bottom) x 445mm (height)
90mm (top) x 295mm (bottom) x 445mm (height)
160mm (top) x 300mm (bottom) x 460mm (height)
90mm (top) x 350mm (bottom) x2 00mm (height)
90mm (top) x 500mm (bottom) x 260mm (height)
115mm (top) x 311mm (bottom) x 1000mm (height)
Managing Director at ERG Industrial
