WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

E21D　SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)

E21D 1/00 Sinking shafts

E21D 1/02 ・by hand

E21D 1/03 ・mechanically, {e.g. by loading shovels or loading buckets, scraping devices, conveying screws}(E21D 1/08 takes precedence)

E21D 1/04 ・・with grabs {(boring grabs E02F 3/44, E21B 27/00; grab buckets for digging in general E02F 3/47)}

E21D 1/06 ・・with shaft-boring cutters (drilling machines E21B, E21C)

E21D 1/08 ・while moving the lining downwards {(lowering the lining into a ready shaft E21D 5/01; sheet piles E02D 5/02)}

E21D 1/10 ・Preparation of the ground {(for galleries or tunnels E21D 9/001; improving or preserving foundation soil or rock E02D 3/00)}

E21D 1/105 ・・{by water level modification}

E21D 1/12 ・・by freezing {(freezing of foundation soil E02D 3/115)}

E21D 1/14 ・・・Freezing apparatus

E21D 1/16 ・・by petrification(grouting anchoring-boltsE21D 20/02; {consolidating foundation soil by placing solidifying or pore-filling substances in the soilE02D 3/12})

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

E21D 5/00 Lining shafts; Linings therefor (E21D 11/00 takes precedence; {sinking with simultaneous lowering of the lining E21D 1/08})

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 (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)

E21D 5/04 ・with brick, concrete, stone, or similar building materials (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)

E21D 5/06 ・with iron or steel (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)

E21D 5/08 ・・in the form of profiled parts

E21D 5/10 ・・in the form of tubbing {or of rings composed of profile elements}

E21D 5/11 ・with combinations of different materials, e.g. wood, metal, concrete (E21D 5/01, E21D 5/012, 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 {(lifts in hoistways or mines B66B 15/00 to B66B 19/00)}

E21D 7/005 ・{Determination of shaft lining deformation}

E21D 7/02 ・Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls (guideways or guides for elevators B66B 7/02)

E21D 8/00 Shafts not provided for in groups E21D 1/00 to E21D 7/00

E21D 9/00 Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D 29/045, E02D 29/063 take precedence; linings per se E21D 11/00); Layout of tunnels or galleries

E21D 9/001 ・{Improving soil or rock, e.g. by freezing; Injections (for sinking shafts E21D 1/10; injection of liquids for binding dust E21F 5/18; improving or preserving foundation soil or rock E02D 3/00; borehole closures, i.e. packers, for use during the injection process E21B 33/12)}

E21D 9/002 ・・{Injection methods characterised by the chemical composition used}

E21D 9/003 ・{Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines}

E21D 9/004 ・・{using light beams for direction or position control}

E21D 9/005 ・{by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit (driving shields E21D 9/06)}

E21D 9/006 ・{by making use of blasting methods (explosive compositions C06B; blasting per se F42)}

E21D 9/007 ・{Methods or devices for restoring the cross-section of tunnels, e.g. by equalising the floor}

E21D 9/02 ・Driving inclined tunnels or galleries

E21D 9/04 ・Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for {(E21D 9/005, E21D 9/06 take precedence; soil improvement E21D 9/001; provisional protective covers E21D 19/04)}

E21D 9/06 ・Making by using a driving shield, {i.e. advanced by pushing means bearing against the already placed lining (pushing prefabricated elements through the ground from an access pit E21D 9/005)}

E21D 9/0607 ・・{the shield being provided with devices for lining the tunnel, e.g. shuttering (E21D 9/082, E21D 9/087 take precedence; tail sealing means used as end shuttering E21D 9/0635)}

E21D 9/0621 ・・{Shield advancing devices}

E21D 9/0628 ・・{Control of the shields, e.g. of the hydraulic advancing cylinders (arrangement of measuring or indicating devices for use during driving of tunnels E21D 9/003)}

E21D 9/0635 ・・{Tail sealing means, e.g. used as end shuttering}

E21D 9/0692 ・・{Cutter drive shields}

E21D 9/08 ・・with additional boring or cutting means {other than the conventional cutting edge of the shield}

E21D 9/081 ・・・{with a rotary drilling head cutting simultaneously the whole front face}

E21D 9/082 ・・・・{the shield being provided with devices for lining the tunnel, e.g. shuttering}

E21D 9/085 ・・・{with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket}

E21D 9/087 ・・・・{the shield being provided with devices for lining the tunnel, e.g. shuttering}

E21D 9/10 ・Making by using boring or cutting machines (E21D 9/08 takes precedence; mining picks E21C 35/18)

E21D 9/1006 ・・{with rotary cutting tools (for cutting simultaneously the whole cross-section E21D 9/11; drill bits E21B 10/00)}

E21D 9/1013 ・・・{on a tool-carrier supported by a movable boom}

E21D 9/102 ・・・・{by a longitudinally extending boom being pivotable about a vertical and a transverse axis}

E21D 9/1026 ・・・・・{the tool-carrier being rotated about a transverse axis}

E21D 9/1033 ・・・・{by a transversely extending boom being pivotable about a longitudinal axis}

E21D 9/104 ・・・{Cutting tool fixtures (devices with percussive tools E21D 9/106)}

E21D 9/1046 ・・・・{Vibrating}

E21D 9/1053 ・・{for making a slit along the perimeter of the tunnel profile, the remaining core being removed subsequently, e.g. by blasting}

E21D 9/106 ・・{with percussive tools, e.g. pick-hammers}

E21D 9/1066 ・・{with fluid jets (projecting hot gases E21D 9/1073; drilling by liquid or gas jets E21B 7/18; slitting by liquid jets E21C 25/60)}

E21D 9/1073 ・・{applying thermal energy, e.g. by projecting flames or hot gases, by laser beams (flame drilling E21B 7/14)}

E21D 9/108 ・・{Remote control specially adapted for machines for driving tunnels or galleries (for machines for slitting or completely freeing the mineral E21C 35/24)}

E21D 9/1086 ・・{Drives or transmissions specially adapted therefor}

E21D 9/1093 ・・{Devices for supporting, advancing or orientating the machine or the tool-carrier (measuring devices for guiding machines 9/00C; anchoring in the borehole E21B 4/18)}

E21D 9/11 ・・with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines

E21D 9/111 ・・・{by means of heads or tool-carrying sectors implementing an oscillating rotary motion}

E21D 9/112 ・・・{by means of one single rotary head or of concentric rotary heads (E21D 9/111 takes precedence)}

E21D 9/113 ・・・・{having a central part for making a pilot tunnel and a follow-up part for enlarging the pilot tunnel (E21D 9/115 takes precedence; similar apparatus for enlarging drilled boreholes E21B 7/28)}

E21D 9/115 ・・・・{with cutting tools mounted pivotably or slidable on the head}

E21D 9/116 ・・・{by means of non-concentric rotary heads (E21D 9/111 takes precedence)}

E21D 9/117 ・・・・{mounted for orientating or sideways shifting relative to the frame}

E21D 9/118 ・・・・{with independently driven central head}

E21D 9/12 ・Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F 13/00)

E21D 9/122 ・・{Working or loading platforms (underground transport E21F 13/00)}

E21D 9/124 ・・{Helical conveying means therefor (E21D 9/13 takes precedence)}

E21D 9/126 ・・{Loading devices or installations (loading platforms E21D 9/122; soil-shifting machines E02F 3/00)}

E21D 9/128 ・・・{Loader-conveyers with gathering arms}

E21D 9/13 ・・using hydraulic or pneumatic conveying means

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

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 (E21D 15/00 to E21D 23/00 take precedence; specially for shafts E21D 5/00; {driving shields in combination with means for lining the tunnel E21D 9/06}; lining pressure water galleries, linings therefor E02B 9/06)

E21D 11/003 ・{Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices (E21D 11/38 takes precedence)}

E21D 11/006 ・{Lining anchored in the rock (setting anchoring-bolts E21D 20/00; anchoring-bolts E21D 21/00)}

E21D 11/02 ・Lining predominantly with wood

E21D 11/03 ・・using timber- setting machines

E21D 11/04 ・Lining with building materials (E21D 11/02, E21D 11/14 take precedence; {compositions of mortars, concrete or like building materials C04B; placing filling-up materials in underground workings E21F 15/00})

E21D 11/05 ・・using compressible insertions

E21D 11/06 ・・with bricks

E21D 11/07 ・・・using brick- laying machines {(brick-laying machines per se E04G 21/22)}

E21D 11/08 ・・with preformed concrete slabs {(backfilling the space between the slabs and the rock E21D 11/105)}

E21D 11/083 ・・・{Methods or devices for joining adjacent concrete segments}

E21D 11/10 ・・with concrete cast in situ; Shuttering {also lost shutterings, e.g. made of blocks, of metal plates} or other equipment adapted therefor

E21D 11/102 ・・・{Removable shuttering; Bearing or supporting devices therefor}

E21D 11/105 ・・・{Transport or application of concrete specially adapted for the lining of tunnels or galleries (in building E04F 21/08, E04G 21/02); Backfilling the space between main building element and the surrounding rock, e.g. with concrete}

E21D 11/107 ・・・{Reinforcing elements therefor; Holders for the reinforcing elements}

E21D 11/12 ・・Temporary supports for use during building {removable shutterings E21D 11/102}; Accessories {(provisional protective covers E21D 19/04)}

E21D 11/14 ・Lining predominantly with metal {(backfilling the space between the lining elements and the rock E21D 11/105)}

E21D 11/15 ・・Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members (insulationE21D 11/38)

E21D 11/152 ・・・{Laggings made of grids or nettings}

E21D 11/155 ・・・{Laggings made of strips, slats, slabs or sheet piles (longitudinal struts for mine arches E21D 11/28)}

E21D 11/157 ・・・{Laggings making use of fluid cushions, e.g. the fluid containing a hardenable material (chocks made of flexible containers E21D 15/483)}

E21D 11/18 ・・Arch members; {Network made of arch members (E21D 11/36 takes precedence); Ring elements; Polygon elements; Polygon elements inside arches (caps for arches E21D 17/00)}

E21D 11/183 ・・・{Supporting means for arch members, not provided for in E21D 11/22}

E21D 11/186 ・・・{Pre-stressing or dismantling devices therefor}

E21D 11/20 ・・・Special cross- sections, e.g. corrugated {(for props E21D 15/502; for caps E21D 17/01)}

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, {i.e. longitudinal connections between adjoining arches}

E21D 11/30 ・・Bases for lower arch members (for props E21D 15/54)

E21D 11/34 ・・Joints between vertical props and horizontal top bars (end caps forming part of the props E21D 15/54; {retaining plates on caps for engaging the tops of pit-props E21D 17/10})

E21D 11/36 ・・Linings or supports specially shaped for tunnels or galleries of irregular cross-section

E21D 11/362 ・・・{for loading areas (lining shafts E21D 5/00)}

E21D 11/365 ・・・{for intersecting galleries}

E21D 11/367 ・・・{for junction with the longwall coal face (walking supports therefor E21D 23/0091)}

E21D 11/38 ・Waterproofing (in general E02D 31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general E04B 1/62)

E21D 11/381 ・・{Setting apparatus or devices}

E21D 11/383 ・・{by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall}

E21D 11/385 ・・{Sealing means positioned between adjacent lining members (for joints in foundation structures E02D 29/16; for sewers E03F 3/04; for building structures in general E04B 1/68)}

E21D 11/40 ・Devices or apparatus specially adapted for handling or placing units of linings {or supporting units} for tunnels or galleries {(combined with tunnelling shields E21D 9/06)}

E21D 11/403 ・・{combined with the head machine}

E21D 13/00 Large underground chambers; Methods or apparatus for making them (lining E21D 11/00)

E21D 15/00 Props (in the building art E04G 25/00); Chocks, {e.g. made of flexible containers filled with backfilling material}

E21D 15/002 ・{Auxiliary devices in which the prop type is not essential (setting or withdrawing props or chocks E21D 15/58, E21D 15/60)}

E21D 15/005 ・{characterised by the material}

E21D 15/007 ・・{spark-reducing}

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 15/08 and E21D 15/10 take precedence)}

E21D 15/14 ・Telescopic props (general means for fixing telescopic parts together {F16B 7/10})

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

E21D 15/155 ・・・{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 {(clamping pressure between telescopic prop elements by means of granular material E21D 15/303)}

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

E21D 15/285 ・・・{by means of wedges or wedge combinations (details of wedges E21D 15/43)}

E21D 15/30 ・・・by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber {(setting props E21D 15/588, E21D 15/589)}

E21D 15/303 ・・・・{by means of granular material (supporting by means of granular material E21D 15/18)}

E21D 15/306 ・・・・{by means of a liquid}

E21D 15/32 ・・・by a deformable collar {or clamping means applied symmetrically inside a locking ring}

E21D 15/325 ・・・・{by a clamping ring}

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 E21D 15/42)

E21D 15/435 ・・・・{hydraulic}

E21D 15/44 ・・Hydraulic, pneumatic, or hydraulic-pneumatic props {see also E21D 15/51}

E21D 15/445 ・・・{comprising a fluid cushion}

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 15/465 ・・・{with essential hydraulic or pneumatic details}

E21D 15/48 ・Chocks or the like

E21D 15/483 ・・{made of flexible containers, e.g. inflatable, with or without reinforcement, e.g. filled with water, backfilling material or the like (laggings making use of fluid cushions E21D 11/157)}

E21D 15/486 ・・{with essential hydraulic or pneumatic details}

E21D 15/50 ・Component parts or details of props (E21D 15/43, E21D 15/58, 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 {not used, see subgroups and E21D 15/44}

E21D 15/512 ・・・{Arrangement of valves (external control of roof support installations E21D 23/12, E21D 23/26)}

E21D 15/515 ・・・{Particular fluids not covered by any chemical subdivision}

E21D 15/517 ・・・{Extension elements}

E21D 15/52 ・・Extensible units located above or below standard props (for allowing step-by-step movement of cap E2123/06; setting props or chocks E21D 15/58)

E21D 15/523 ・・・{with hydraulic or pneumatic control}

E21D 15/526 ・・・{for step-by-step extension of the prop}

E21D 15/54 ・・Details of the ends of props (for permitting step-by-step movement E21D 23/06)

E21D 15/545 ・・・{hydraulic or pneumatic}

E21D 15/55 ・・・of prop heads {or feet}

E21D 15/56 ・・Details of locks of telescopic props

E21D 15/563 ・・・{by which a series of similarly shaped props can obtain an almost equal load-capacity (setting props or chocks E21D 15/584, E21D 15/589)}

E21D 15/566 ・・・{comprising a fluid cushion}

E21D 15/58 ・Devices for setting props or chocks

E21D 15/581 ・・{in which the props are pre- loaded (extensible elements at strut extremities E21D 15/52)}

E21D 15/582 ・・・{by means of power accumulators to be pre-charged by rock pressure (by means of hydraulically operated devices E21D 15/587)}

E21D 15/583 ・・・{in which the lock is also activated}

E21D 15/584 ・・{in which a series of similarly shaped props obtain an almost equal load capacity by removable devices (idem for extensible props E21D 15/563)}

E21D 15/585 ・・{by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important (hydraulic props in which the hydraulic part is important E21D 15/44)}

E21D 15/586 ・・・{the props being pre-loaded}

E21D 15/587 ・・・・{by means of power accumulators to be pre-charged by rock pressure}

E21D 15/588 ・・・・{the lock also being activated}

E21D 15/589 ・・・{in which a series of similarly shaped props are given almost equal load capacity by removable devices}

E21D 15/60 ・Devices for withdrawing props or chocks

E21D 15/603 ・・{by means of hydraulic devices}

E21D 15/606 ・・{the props being moved systematically (mine roof supports for step-by-step movementE21D 23/00)}

E21D 17/00 Caps for supporting mine roofs

E21D 17/003 ・{with essential hydraulic elements}

E21D 17/006 ・{characterised by the material}

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 17/0206 ・・{Hydraulically operated extension devices}

E21D 17/0213 ・・{Assembling devices for pivoting caps upwardly}

E21D 17/03 ・・Brackets for roof-supporting bars

E21D 17/04 ・・for use in longwall working

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 ・・・or 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 (E21D 9/06, E21D 23/00 take precedence)

E21D 19/02 ・for use in longwall working

E21D 19/04 ・for use in drifting galleries

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

E21D 20/003 ・{Machines for drilling anchor holes and setting anchor bolts}

E21D 20/006 ・・{having magazines for storing and feeding anchoring-bolts (combined feeding from racks and connecting of drill rods or the like E21B 19/20)}

E21D 20/02 ・with provisions for grouting

E21D 20/021 ・・{Grouting with inorganic components, e.g. cement}

E21D 20/023 ・・・{Cartridges; Grouting charges}

E21D 20/025 ・・{Grouting with organic components, e.g. resin}

E21D 20/026 ・・・{Cartridges; Grouting charges}

E21D 20/028 ・・{Devices or accesories for injecting a grouting liquid in a bore-hole (E21D 20/003 takes precedence; improving soil or rock by injections E21D 9/001)}

E21D 21/00 Anchoring-bolts for roof, floor {in galleries or longwall working}, or shaft-lining protection ({ground anchors E02D 5/80; anchorings for building constructions E04B 1/41, E21D 2/30}; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B 13/00; {bolts with visible load G01L 1/00})

E21D 21/0006 ・{characterised by the bolt material}

E21D 21/0013 ・{Protection against corrosion}

E21D 21/002 ・{using explosives charges}

E21D 21/0026 ・{characterised by constructional features of the bolts}

E21D 21/0033 ・・{having a jacket or outer tube}

E21D 21/004 ・・{Bolts held in the borehole by friction all along their length, without additional fixing means}

E21D 21/0046 ・・{formed by a plurality of elements arranged longitudinally}

E21D 21/008 ・{Anchoring or tensioning means}

E21D 21/0086 ・{Bearing plates}

E21D 21/0093 ・{Accessories}

E21D 21/02 ・having means for indicating tension (screwed connections specially modified for indicating tensile load 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 [(N:

E21D 23/0004 ・{along the working face}

E21D 23/0008 ・・{comprising a pair of joined struts}

E21D 23/0013 ・・{Frame type supports}

E21D 23/0017 ・・{Pile type supports}

E21D 23/0021 ・・・{comprising two walking elements}

E21D 23/0026 ・・・{comprising three walking elements}

E21D 23/003 ・・・{consisting of a rigid pile}

E21D 23/0034 ・・{comprising a goaf shield articulated to a base member}

E21D 23/0039 ・・・{and supported by a strut or by a row of struts parallel to the working face}

E21D 23/0043 ・・・{and supported by two or more rows of struts parallel to the working face}

E21D 23/0047 ・{without essential shifting devices}

E21D 23/0052 ・{with advancing shifting devices connected therewith}

E21D 23/0056 ・{with individual advancing shifting devices}

E21D 23/006 ・{provided with essential hydraulic devices}

E21D 23/0065 ・・{driven, or automatically, e.g. electrically-hydraulically controlled}

E21D 23/0069 ・・{without essential advancing shifting devices}

E21D 23/0073 ・・{with advancing shifting devices connected therewith}

E21D 23/0078 ・・{with individual shifting devices}

E21D 23/0082 ・{specially adapted for vertical or steep gradient seams}

E21D 23/0086 ・{in galleries}

E21D 23/0091 ・・{at the junction with the working face}

E21D 23/0095 ・・{Temporary supports at the driving front}

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

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 (E21D 23/14 takes precedence)

E21D 23/0409 ・・{Aligning or guiding means for the supports or for the constitutive parts of the supports}

E21D 23/0418 ・・{Positioning devices and stabilizing means for the props}

E21D 23/0427 ・・{Shield operating devices; Hinges therefor}

E21D 23/0436 ・・{Means for inclining the base member of the support}

E21D 23/0445 ・・{Extensions of the base member supporting the conveyer}

E21D 23/0454 ・・{Trailing plates; Coal face or goaf side sprags (specially adapted for the placing of filling-up materials E21D 23/0481)}

E21D 23/0463 ・・{Hanging or shifting means for tubes, electric feeding cables or the like}

E21D 23/0472 ・・{Supports specially adapted for people walking or transporting material}

E21D 23/0481 ・・{Supports specially adapted for use in combination with the placing of filling-up materials (placing filling-up materials in underground workings per se E21F 15/00)}

E21D 23/049 ・・{Connecting devices between the head or foot of a prop and the cap or base of the roof support}

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

E21D 23/063 ・・・{Retractable cantilever extensions therefor}

E21D 23/066 ・・・{Pivoted cantilever extensions therefor}

E21D 23/08 ・Advancing mechanisms (E21D 23/16 takes precedence)

E21D 23/081 ・・{forming parts of the roof supports}

E21D 23/082 ・・・{acting solely on the elements of the supports}

E21D 23/083 ・・・{acting on a firm abutment adapted thereto}

E21D 23/085 ・・・{acting on a conveyer or a guide for the mining machine}

E21D 23/086 ・・・・{Details of fixing devices therefor}

E21D 23/087 ・・・{acting directly on the walls of the seam}

E21D 23/088 ・・・・{by means of wheels, rollers, caterpillars, belts or worm screws}

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

E21D 23/12 ・Control, e.g. using remote control (E21D 23/16 takes precedence)

E21D 23/14 ・・Effecting automatic sequential movement of supports, e.g. one behind the other ({advancing of mining machines toward the working face E21C 29/02; advancing of conveyers toward the working face E21D 23/085})

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

E21D 2009/00 Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D 29/045, E02D 29/063 take precedence; linings per se E21D 11/00); Layout of tunnels or galleries

E21D 2009/008 ・Driving transverse tunnels starting from existing tunnels

E21D 2009/06 ・Making by using a driving shield, {i.e. advanced by pushing means bearing against the already placed lining (pushing prefabricated elements through the ground from an access pit E21D 9/005)}

E21D 2009/0607 ・・{the shield being provided with devices for lining the tunnel, e.g. shuttering (E21D 9/082, E21D 9/087 take precedence; tail sealing means used as end shuttering E21D 9/0635)}

E21D 2009/0614 ・・・with means for applying a continuous liner, e.g. sheets of plastics, between the main concrete lining and the rock

E21D 2009/0642 ・・the shield having means for additional processing at the front end

E21D 2009/065 ・・・with devices for provisionally supporting the front face

E21D 2009/0657 ・・・structurally associated with rock crushers

E21D 2009/0664 ・・・with means for applying a coating layer to the front face, e.g. by spraying

E21D 2009/0671 ・・・with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes

E21D 2009/0678 ・・・Adding additives, e.g. chemical compositions, to the slurry or the cuttings (bentonite shall not be coded)

E21D 2009/0685 ・・・・Foaming agents

E21D 2009/08 ・・with additional boring or cutting means {other than the conventional cutting edge of the shield}

E21D 2009/081 ・・・{with a rotary drilling head cutting simultaneously the whole front face}

E21D 2009/084 ・・・・with rotary drilling heads having variable diameter

E21D 2009/088 ・・・for driving non-circular tunnels

E21D 2011/00 Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling (E21D 15/00 to E21D 23/00 take precedence; specially for shafts E21D 5/00; {driving shields in combination with means for lining the tunnel E21D 9/06}; lining pressure water galleries, linings therefor E02B 9/06)

E21D 2011/04 ・Lining with building materials (E21D 11/02, E21D 11/14 take precedence; {compositions of mortars, concrete or like building materials C04B; placing filling-up materials in underground workings E21F 15/00})

E21D 2011/08 ・・with preformed concrete slabs {(backfilling the space between the slabs and the rock E21D 11/105)}

E21D 2011/086 ・・・Making of concrete lining segments

E21D 2011/38 ・Waterproofing (in general E02D 31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general E04B 1/62)

E21D 2011/385 ・・{Sealing means positioned between adjacent lining members (for joints in foundation structures E02D 29/16; for sewers E03F 3/04; for building structures in general E04B 1/68)}

E21D 2011/386 ・・・inflatable

E21D 2011/388 ・・・having longitudinal cavities communicating with the exterior on the outer side of the lining elements

E21D 2011/40 ・Devices or apparatus specially adapted for handling or placing units of linings {or supporting units} for tunnels or galleries {(combined with tunnelling shields E21D 9/06)}

E21D 2011/406 ・・Placing endless lining elements, e.g. from reels (in combination with a tunnelling shield E21D 2009/0614)

E21D 2021/00 Anchoring-bolts for roof, floor {in galleries or longwall working}, or shaft-lining protection ({ground anchors E02D 5/80; anchorings for building constructions E04B 1/41, E21D 2/30}; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B 13/00; {bolts with visible load G01L 1/00})

E21D 2021/0026 ・{characterised by constructional features of the bolts}

E21D 2021/0053 ・・Anchoring-bolts in the form of lost drilling rods

E21D 2021/006 ・・Anchoring-bolts made of cables or wires

E21D 2021/0066 ・・Anchoring-bolts formed by a bundle of radially arranged rigid elements

E21D 2021/0073 ・・Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

E21D 2023/00 Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor [(N:

E21D 2023/12 ・Control, e.g. using remote control (E21D 23/16 takes precedence)

E21D 2023/14 ・・Effecting automatic sequential movement of supports, e.g. one behind the other ({advancing of mining machines toward the working face E21C 29/02; advancing of conveyers toward the working face E21D 23/085})

E21D 2023/142 ・・・Measuring the advance of support units with respect to external points of reference

E21D 2023/144 ・・・Measuring the advance of support units with respect to internal points of reference, e.g. with respect to neighbouring support units or extension of a cylinder

E21D 2023/146 ・・・Transmission of signals and commands by cable

E21D 2023/148 ・・・Wireless transmission of signals and commands