آلة حفر الأنفاق Sandvik DS421

The Sandvik DS421 (historically evolved from the Cabolt lineage) is a highly mechanized, self-contained rock reinforcement drill rig specialized for installing cement-grouted cable bolts in small to medium-cross-section underground mines and tunnels.
Managed by a single operator, the machine fully mechanizes the drilling, grouting, and cable installation loop to ensure high ground-support productivity and optimal operator safety

Rock Drill: Equipped with a high-performance Sandvik HL510 hydraulic rock drill featuring an R32 Male connection.
Bolting Head: Utilizes the dedicated CBH Cable Bolting Head module that keeps the operator safely distanced from active drilling and grouting zones.
Boom Type: Features the TBR60 robust bolting boom.

Cable Bolt Installation Capacity: Capable of installing cable bolts up to 25 metres long, utilizing several steel strands per single hole.

Recommended Hole Size: Optimised for 51 mm to 57 mm hole diameters.

Steel Strand Diameter: Typically handles 15.2 mm plain steel or bulb anchor strands.

Drill Rod Handling: Onboard system holds 19 pieces of \(1\frac{1}{4}\text{-inch}\) round male/female (MF) drill rods.

Shift Autonomy: Outfitted with an onboard cement mixer, a cement bag platform, and a steel strand reel, rendering the rig fully autonomous for longer than a single work shift.