TREA

Caps for supporting mine roofs

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Industry

  • CPC
  • E21D17/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS

Current Industry

E21D17/00Caps for supporting mine roofs

Sub Industries

E21D17/003with essential hydraulic elements E21D17/006characterised by the material E21D17/01characterised by the shape of the cap E21D17/02Cantilever extension or similar protecting devices E21D17/0206Hydraulically operated extension devices E21D17/0213Assembling devices for pivoting caps upwardly E21D17/03Brackets for roof-supporting bars E21D17/04for use in longwall working E21D17/06for use in drifting galleries E21D17/08Cap joints for obtaining a coal-face free of pit-props E21D17/082of sliding type E21D17/086or articulated type E21D17/10Details of mine caps for engaging the tops of pit-props, with or without retaining-plates Retaining-plates
Industries