SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)

Child Classifications

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• E21D 1/00 Sinking shafts IPC+CPC Available in IPC and CPC
• E21D 11/00 Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling (E21D15/00 - E21D23/00 take precedence; specially for shafts E21D5/00; ; lining pressure water galleries, linings therefor E02B9/06) +2 CPC IPC+CPC Available in IPC and CPC
• E21D 13/00 Large underground chambers; Methods or apparatus for making them (lining E21D11/00) IPC+CPC Available in IPC and CPC
• E21D 15/00 Props (in the building art E04G25/00); Chocks +2 CPC IPC+CPC Available in IPC and CPC
• E21D 17/00 Caps for supporting mine roofs +2 CPC IPC+CPC Available in IPC and CPC
• E21D 19/00 Provisional protective covers for working space (E21D9/06, E21D23/00 take precedence) −1 IPC IPC+CPC Available in IPC and CPC
• E21D 20/00 Setting anchoring-bolts (anchoring bolts for shafts, tunnels or galleries E21D21/00; means for anchoring structural elements or bulkheads specially adapted to foundation engineering E02D5/74; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B13/00) +1 CPC IPC+CPC Available in IPC and CPC
• E21D 21/00 Anchoring-bolts for roof, floor , or shaft-lining protection (; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B13/00 ) +7 CPC IPC+CPC Available in IPC and CPC
• E21D 23/00 Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor ( shifting of mine conveyors at the working face E21F13/08) +7 CPC IPC+CPC Available in IPC and CPC
• E21D 3/00 Raising shafts, i.e. working upwards from the bottom IPC+CPC Available in IPC and CPC
• E21D 5/00 Lining shafts; Linings therefor (E21D11/00 takes precedence ) IPC+CPC Available in IPC and CPC
• E21D 7/00 Shaft equipment, e.g. timbering within the shaft +1 CPC IPC+CPC Available in IPC and CPC
• E21D 8/00 Shafts not provided for in groups E21D1/00 - E21D7/00 since 2006 IPC+CPC Available in IPC and CPC
• E21D 9/00 Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D29/045, E02D29/063 take precedence; linings per se E21D11/00); Layout of tunnels or galleries +6 CPC IPC+CPC Available in IPC and CPC