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Tunnelling and rock drilling equipment

Short answer

Tunnelling equipment includes jackhammers, drill jumbos, roadheaders, mucking loaders, shotcrete machines, ventilation fans, TBMs and lining forms. Drill jumbo drills the face pattern with multiple booms. Roadheader cuts soft rock without blasting. TBM excavates full face continuously.

Discuss the different equipments used for tunnel construction (list the different types of tunnelling and rock drilling equipments and explain briefly).

Tunnelling and rock drilling equipment

FunctionEquipment
DrillingJackhammer (hand-held), drifter, drill jumbo (multi-boom)
BlastingExplosives, detonators, blasting machine, charging equipment
Mucking (removal)Loaders (rocker shovel), excavators, conveyors, muck cars, dumpers, rail haulage
SupportRock bolt drilling rigs, shotcrete (sprayed concrete) machines, steel ribs, rock anchors
Ventilation and servicesFans, ducts, pumps, compressor, lighting
Full-face excavationTunnel boring machines (TBM), roadheaders
LiningConcrete forms (travelling formwork), concrete pumps, precast segment erector

Brief explanation

  • Jackhammer / pneumatic drill: air-powered hand drill, using drill steels with tungsten carbide bits to make blast holes in small tunnels.
  • Drill jumbo: a rig with several booms and drifters mounted on a truck or rail-wheeled frame; drills the entire face pattern quickly with accurate hole position.
  • Roadheader: a boom with a cutter head that grinds soft to medium rock without blasting.
  • Rocker shovel / loader: loads blasted muck into cars or trucks behind it.
  • Shotcrete machine: sprays concrete, with accelerator, on the rock to stabilise it.
  • TBM: a rotating cutter head with disc cutters that excavate the full circular face, with continuous support and muck removal.
  • Ventilation fans: supply fresh air and remove dust and blast fumes.

✓ Answer checked by Claude Opus 5.5 (high effort)

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