Sandvik launches solutions to reduce noise from top hammer drill rigs

Sandvik Mining and Rock Technology has introduced two solutions which it says reduce noise emissions in surface top hammer drilling.

The main source of noise from a top hammer drill rig is the rock drill itself, which accounts for up to 75% of the total sound power level from a drill rig. The NoiseGuard-DXi and NoiseShield-DC reduce the sound level around the drill rig by isolating the rock drill and rod handling system inside a noise-suppressing structure. Both solutions are effective at suppressing the most disturbing drilling noise frequencies, between 2,500 and 10,000 Hz, the company adds.

Sandvik’s NoiseGuard-DXi reduces noise emissions from Ranger DXi series drill rigs (max. 27 kW rock drill, recommended hole diametre 51–127 mm / 2”–5”) designed for construction applications and quarries. The solution is a fully enclosed structure that provides up to -12.9 dB noise reduction in A-weighted sound pressure within a 16-metre radius of the rig. In this measuring distance, the noise reduction compared to unmitigated sound pressure is up to 95%. The NoiseGuard-DXi option comes with a camera system that provides visually aided drilling when the structure doors are closed. Additionally, it has a single-bolt dismantling design for fast and easy maintenance on the feed system.

The NoiseShield-DC is a compact solution for the smaller, cabinless Dino DC410Ri drill rigs (14 kW rock drill, recommended hole diameter 51–76 mm / 2”–3”) that excel in urban worksites. NoiseShield-DC offers up to a -7.5 dB reduction in A-weighted sound pressure by directing the drilling noise upwards through an open top, away from the operator and surrounding areas. This reduction translates to an 82% mitigation in noise pressure within a 16-metre radius of the drill rig.

For noise reduction for the classic Ranger DX series drill rigs, a solution called NoiseGuard-DX has been successful in the market for several years.



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