|  | E |
SECTION E — FIXED CONSTRUCTIONS

EARTH DRILLING; MINING

|  | E21 |
EARTH DRILLING; MINING

|  | E21 |
Note(s) In this class, the following term is used with the meaning indicated: "drilling" covers boring and vice versa.

|  | E21D |
SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil conditioning or soil stabilising materials Fulltext... Hierarchy... Expanded...C09K 17/00; drilling or cutting machines for mining or quarrying Fulltext... Hierarchy... Expanded...E21C; safety devices, transport, rescue, ventilation or drainage Fulltext... Hierarchy... Expanded...E21F) [2,6]

|  | E21D |
Note(s) This subclass covers methods or apparatus for making or lining tunnels, galleries or large underground chambers, using underground mining methods only, i.e. not involving disturbance of the ground surface. [6] This subclass does not cover underground spaces made by foundation engineering, i.e. involving disturbance of the ground surface, which are covered by subclass Fulltext... Hierarchy... Expanded...E02D. [6]

|  | E21D |
Subclass index
MAKING SHAFTS; LININGS THEREFOR | 1/00, 3/00, 7/00; 5/00
MAKING TUNNELS OR GALLERIES; LININGS THEREFOR | 9/00; 11/00
MAKING UNDERGROUND CHAMBERS; LININGS THEREFOR | 13/00; 11/00
WORKING-FACE SUPPORTS OR COVERS | 15/00, 17/00, 19/00, 21/00
SUPPORTS FOR STEP-BY-STEP MOVEMENT | 23/00
SETTING ANCHORING BOLTS | 20/00

|  | E21D 1/00 - E21D 7/00 |
Shafts

|  | E21D 1/00 |
Sinking shafts

|  | E21D 1/02 |
· | by hand

|  | E21D 1/03 |
· | mechanically (Fulltext... Hierarchy... Expanded...E21D 1/08 takes precedence)

|  | E21D 1/04 |
· · | with grabs

|  | E21D 1/06 |
· · | with shaft-boring cutters (drilling machines Fulltext... Hierarchy... Expanded...E21B, Fulltext... Hierarchy... Expanded...E21C)

|  | E21D 1/08 |
· | while moving the lining downwards

|  | E21D 1/10 |
· | Preparation of the ground

|  | E21D 1/12 |
· · | by freezing

|  | E21D 1/14 |
· · · | Freezing apparatus

|  | E21D 1/16 |
· · | by petrification (grouting anchoring-bolts Fulltext... Hierarchy... Expanded...E21D 20/02)

|  | E21D 3/00 |
Raising shafts, i.e. working upwards from the bottom

|  | E21D 5/00 |
Lining shafts; Linings therefor (Fulltext... Hierarchy... Expanded...E21D 11/00 takes precedence) [3]

|  | E21D 5/01 |
· | using prefabricated lining lowered into a hole filled with liquid or viscous mass

|  | E21D 5/012 |
· | Use of fluid-tight or anti-friction material on outside of, or between, lining layers

|  | E21D 5/016 |
· | Bearer curbs

|  | E21D 5/02 |
· | with wood (Fulltext... Hierarchy... Expanded...E21D 5/01, Fulltext... Hierarchy... Expanded...E21D 5/012, Fulltext... Hierarchy... Expanded...E21D 5/016 take precedence)

|  | E21D 5/04 |
· | with brick, concrete, stone, or similar building materials (Fulltext... Hierarchy... Expanded...E21D 5/01, Fulltext... Hierarchy... Expanded...E21D 5/012, Fulltext... Hierarchy... Expanded...E21D 5/016 take precedence)

|  | E21D 5/06 |
· | with iron or steel (Fulltext... Hierarchy... Expanded...E21D 5/01, Fulltext... Hierarchy... Expanded...E21D 5/012, Fulltext... Hierarchy... Expanded...E21D 5/016 take precedence)

|  | E21D 5/08 |
· · | in the form of profiled parts

|  | E21D 5/10 |
· · | in the form of tubbing

|  | E21D 5/11 |
· | with combinations of different materials, e.g. wood, metal, concrete (Fulltext... Hierarchy... Expanded...E21D 5/01, Fulltext... Hierarchy... Expanded...E21D 5/012, Fulltext... Hierarchy... Expanded...E21D 5/016 take precedence)

|  | E21D 5/12 |
· | Accessories for making shaft linings, e.g. suspended cradles, shutterings

|  | E21D 7/00 |
Shaft equipment, e.g. timbering within the shaft

|  | E21D 7/02 |
· | Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls (guideways or guides for elevators Fulltext... Hierarchy... Expanded...B66B 7/02)

|  | E21D 9/00 - E21D 13/00 |
Tunnels; Galleries; Large underground chambers; Linings therefor (galleries protecting against falling rocks or avalanches Fulltext... Hierarchy... Expanded...E01F 7/04; pressure galleries, galleries specially adapted to house pressure water conduits Fulltext... Hierarchy... Expanded...E02B 9/06; sewers Fulltext... Hierarchy... Expanded...E03F) [3,6]

|  | E21D 9/00 |
Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (linings per se Fulltext... Hierarchy... Expanded...E21D 11/00); Layout of tunnels or galleries [3]

|  | E21D 9/02 |
· | Driving inclined tunnels or galleries [3]

|  | E21D 9/04 |
· | Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for

|  | E21D 9/06 |
· | Making by using a driving shield [2]

|  | E21D 9/08 |
· · | with additional boring or cutting means [2]

|  | E21D 9/10 |
· | Making by using boring or cutting machines (Fulltext... Hierarchy... Expanded...E21D 9/08 takes precedence; mining picks Fulltext... Hierarchy... Expanded...E21C 35/18) [3]

|  | E21D 9/12 |
· | Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport Fulltext... Hierarchy... Expanded...E21F 13/00) [2]

|  | E21D 9/14 |
· | Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings [3]

|  | E21D 10/00 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/045, Fulltext... Hierarchy... Expanded...E02D 29/063 )

|  | E21D 10/02 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/045 )

|  | E21D 10/04 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/05 )

|  | E21D 10/06 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/055 )

|  | E21D 10/08 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/063 )

|  | E21D 10/10 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/067 )

|  | E21D 10/12 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/07 )

|  | E21D 10/14 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/073 )

|  | E21D 10/16 |
( transferred to Fulltext... Hierarchy... Expanded...E02D 29/077 )

|  | 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 (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...E21D 15/00-E21D 23/00 take precedence; specially for shafts Fulltext... Hierarchy... Expanded...E21D 5/00; lining pressure water galleries, linings therefor Fulltext... Hierarchy... Expanded...E02B 9/06) [2]

|  | E21D 11/02 |
· | Lining predominantly with wood [2]

|  | E21D 11/03 |
· · | using timber-setting machines

|  | E21D 11/04 |
· | Lining with building materials (Fulltext... Hierarchy... Expanded...E21D 11/02, Fulltext... Hierarchy... Expanded...E21D 11/14 take precedence) [2]

|  | E21D 11/05 |
· · | using compressible insertions

|  | E21D 11/06 |
· · | with bricks

|  | E21D 11/07 |
· · · | using brick-laying machines

|  | E21D 11/08 |
· · | with preformed concrete slabs

|  | E21D 11/10 |
· · | with concrete cast in situ; Shuttering or other equipment adapted therefor

|  | E21D 11/12 |
· · | Temporary supports for use during building; Accessories

|  | E21D 11/14 |
· | Lining predominantly with metal [2]

|  | E21D 11/15 |
· · | Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members (insulation Fulltext... Hierarchy... Expanded...E21D 11/38) [2]

|  | E21D 11/18 |
· · | Arch members

|  | E21D 11/20 |
· · · | Special cross-sections, e.g. corrugated

|  | E21D 11/22 |
· · · | Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure

|  | E21D 11/24 |
· · · | Knuckle joints or links between arch members

|  | E21D 11/26 |
· · · | Shoes for connecting arch members to longitudinal struts

|  | E21D 11/28 |
· · | Longitudinal struts

|  | E21D 11/30 |
· · | Bases for lower arch members (for props Fulltext... Hierarchy... Expanded...E21D 15/54)

|  | E21D 11/34 |
· · | Joints between vertical props and horizontal top bars (end caps forming part of the props Fulltext... Hierarchy... Expanded...E21D 15/54)

|  | E21D 11/36 |
· · | Linings or supports specially shaped for tunnels or galleries of irregular cross-section [2,3]

|  | E21D 11/38 |
· | Waterproofing (in general Fulltext... Hierarchy... Expanded...E02D 31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general Fulltext... Hierarchy... Expanded...E04B 1/62) [2]

|  | E21D 11/40 |
· | Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries [2]

|  | E21D 13/00 |
Large underground chambers; Methods or apparatus for making them (lining Fulltext... Hierarchy... Expanded...E21D 11/00) [6]

|  | E21D 13/02 |
· | Methods

|  | E21D 13/04 |
· | Special equipment; Accessories

|  | E21D 15/00 - E21D 23/00 |
Working-face supports

|  | E21D 15/00 |
Props (in the building art Fulltext... Hierarchy... Expanded...E04G 25/00); Chocks

|  | E21D 15/02 |
· | Non-telescopic props

|  | E21D 15/04 |
· · | with wooden prop parts joined by double conical connectors

|  | E21D 15/06 |
· · | with parts joined by a lock, with or without slight axial adjustability

|  | E21D 15/08 |
· · · | with toggle joint connection

|  | E21D 15/10 |
· · · | with dog-clutch or pin-and-hole connection

|  | E21D 15/12 |
· · · | with locking devices located near head or foot

|  | E21D 15/14 |
· | Telescopic props (general means for fixing telescopic parts together Fulltext... Hierarchy... Expanded...F16B)

|  | E21D 15/15 |
· · | Means counteracting entry of dirt; Built-in cleaning devices

|  | E21D 15/16 |
· · | with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure

|  | E21D 15/18 |
· · · | with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure

|  | E21D 15/20 |
· · · | with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like spaced apart at intervals

|  | E21D 15/22 |
· · · | with member, pin, cross-piece, or the like ruptured, sheared through, or permanently deformed upon excessive pressure

|  | E21D 15/24 |
· · · | with axial screw-and-nut, rack-and-worm, or like mechanism

|  | E21D 15/26 |
· · · · | with screw, worm, or the like not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure

|  | E21D 15/28 |
· · | with parts held relatively to each other by friction or gripping, e.g. using wedges

|  | E21D 15/30 |
· · · | by means expanded or contracted by pressure applied through the medium of a fluid or quasi-fluid, e.g. rubber

|  | E21D 15/32 |
· · · | by a deformable collar

|  | E21D 15/34 |
· · · | by axially-moving balls, rollers, or the like

|  | E21D 15/36 |
· · · | by a tiltable collar surrounding one or both parts

|  | E21D 15/38 |
· · · | with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations

|  | E21D 15/40 |
· · · | Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted

|  | E21D 15/42 |
· · · | with special parts to influence the friction

|  | E21D 15/43 |
· · · | Details of wedges (friction linings or pads Fulltext... Hierarchy... Expanded...E21D 15/42)

|  | E21D 15/44 |
· · | Hydraulic, pneumatic, or hydraulic-pneumatic props

|  | E21D 15/45 |
· · · | having closed fluid system, e.g. with built-in pumps or accumulators

|  | E21D 15/46 |
· · | with load-measuring devices; with alarm devices

|  | E21D 15/48 |
· | Chocks or the like

|  | E21D 15/50 |
· | Component parts or details of props (Fulltext... Hierarchy... Expanded...E21D 15/43, Fulltext... Hierarchy... Expanded...E21D 15/58, Fulltext... Hierarchy... Expanded...E21D 15/60 take precedence)

|  | E21D 15/502 |
· · | Prop bodies characterised by their shape, e.g. of specified cross-section

|  | E21D 15/51 |
· · | specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves

|  | E21D 15/52 |
· · | Extensible units located above or below standard props

|  | E21D 15/54 |
· · | Details of the ends of props (for permitting step-by-step movement Fulltext... Hierarchy... Expanded...E21D 23/06)

|  | E21D 15/55 |
· · · | of prop heads

|  | E21D 15/56 |
· · | Details of locks of telescopic props

|  | E21D 15/58 |
· | Devices for setting props

|  | E21D 15/582 |
· · | for mechanical props

|  | E21D 15/59 |
· · | for hydraulic, pneumatic, or hydraulic-pneumatic props

|  | E21D 15/60 |
· | Devices for withdrawing props or chocks

|  | E21D 17/00 |
Caps for supporting mine roofs

|  | E21D 17/01 |
· | characterised by the shape of the cap, e.g. of specified cross-section

|  | E21D 17/02 |
· | Cantilever extension or similar protecting devices

|  | E21D 17/022 |
· · | Auxiliary devices for temporary support of roof-supporting beams whilst assembling

|  | E21D 17/03 |
· · | Brackets for roof-supporting bars

|  | E21D 17/04 |
· · | for use in longwall working

|  | E21D 17/05 |
· · · | hydraulically extensible

|  | E21D 17/054 |
· · · | hydraulically pivotable

|  | E21D 17/06 |
· · | for use in drifting galleries

|  | E21D 17/08 |
· · | Cap joints for obtaining a coal-face free of pit-props

|  | E21D 17/082 |
· · · | of sliding type

|  | E21D 17/086 |
· · · | of articulated type

|  | E21D 17/10 |
· | Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates

|  | E21D 19/00 |
Provisional protective covers for working space (Fulltext... Hierarchy... Expanded...E21D 9/06, Fulltext... Hierarchy... Expanded...E21D 23/00 take precedence) [3]

|  | E21D 19/02 |
· | for use in longwall working

|  | E21D 19/04 |
· | for use in drifting galleries

|  | E21D 19/06 |
· | Arrangements for applying the covers [6]

|  | E21D 20/00 |
Setting anchoring-bolts (anchoring bolts for shafts, tunnels or galleries Fulltext... Hierarchy... Expanded...E21D 21/00; means for anchoring structural elements or bulkheads specially adapted to foundation engineering Fulltext... Hierarchy... Expanded...E02D 5/74; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose Fulltext... Hierarchy... Expanded...F16B 13/00) [5]

|  | E21D 20/02 |
· | with provisions for grouting

|  | 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 purpuse Fulltext... Hierarchy... Expanded...F16B 13/00) [5]

|  | E21D 21/02 |
· | having means for indicating tension (screwed connections specially modified for indicating tensile load Fulltext... Hierarchy... Expanded...F16B 31/02)

|  | E21D 23/00 |
Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (shifting of mine conveyers at the working face, per se Fulltext... Hierarchy... Expanded...E21F 13/08)

|  | E21D 23/03 |
· | having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support [4]

|  | E21D 23/04 |
· | Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor (Fulltext... Hierarchy... Expanded...E21D 23/14 takes precedence)

|  | E21D 23/06 |
· · | Special mine caps or special tops of pit-props for permitting step-by-step movement

|  | E21D 23/08 |
· | Advancing mechanisms (Fulltext... Hierarchy... Expanded...E21D 23/16 takes precedence)

|  | E21D 23/10 |
· · | with advancing devices separate from the supporting construction

|  | E21D 23/12 |
· | Control, e.g. using remote control (Fulltext... Hierarchy... Expanded...E21D 23/16 takes precedence)

|  | E21D 23/14 |
· · | Effecting automatic sequential movement of supports, e.g. one behind the other

|  | E21D 23/16 |
· | Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices

|  | E21D 23/18 |
· · | of advancing mechanisms

|  | E21D 23/20 |
· · · | for sequential movement, e.g. one behind the other

|  | E21D 23/22 |
· · · | incorporated in mine caps

|  | E21D 23/24 |
· · · | the advancing mechanisms being separate from the supporting construction

|  | E21D 23/26 |
· · | Hydraulic or pneumatic control