TREA

Anchoring-bolts for roof, floor in galleries or longwall working , or shaft-lining protection

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Industry

  • CPC
  • E21D21/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS

Current Industry

E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working , or shaft-lining protection

Sub Industries

E21D21/0006characterised by the bolt material E21D21/0013Protection against corrosion E21D21/002using explosives charges E21D21/0026characterised by constructional features of the bolts E21D21/0033having a jacket or outer tube E21D21/004Bolts held in the borehole by friction all along their length, without additional fixing means E21D21/0046formed by a plurality of elements arranged longitudinally E21D21/0053Anchoring-bolts in the form of lost drilling rods E21D21/006Anchoring-bolts made of cables or wires E21D21/0066Anchoring-bolts formed by a bundle of radially arranged rigid elements E21D21/0073Anchoring-bolts having an inflatable sleeve E21D21/008Anchoring or tensioning means E21D21/0086Bearing plates E21D21/0093Accessories E21D21/02having means for indicating tension
Industries