Underground intensifier pump for mega and cable bolts
A new two-speed underground pump that can tension mega and cable bolts more than six times faster than conventional air powered hydraulic pumps is being introduced to Australia and New Zealand by Custom Mining Products.
The new Enerpac underground intensifier pump – incorporating Enerpac ZA4 pump components proven globally – is designed to radically streamline one of the most common sub-surface construction and maintenance tasks encountered in coal and minerals extraction.
Based on the experience of mining contractors who constantly undertake such tasks as establishing roof structures and shafts, the new pump, operating at 6,000 psi (414 bar) oil pressure, tensions bolts to 20-30 tons in 30-60 seconds using as little as 60 psi (4 bar) pit air pressure.
The pump – which contains no exposed aluminium components and is designed for use in potentially explosive atmospheres – can tension up to 60x 8m mega bolts an hour to swiftly secure roof and rib structures.
The rapid extension of the cylinder plunger on the pump’s fast speed enables it to be positioned quickly and precisely, while the slower, high-power, stroke then brings to bear the force and reliability for which Enerpac ZA4 pumps have been known for a decade. The ZA4 Series pumps are ATEX 95 certified for use in potentially explosive atmospheres.
New Enerpac underground intensifier pump