| Patents for E21D 20 - Setting anchoring-bolts (3,685) |
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| 05/24/1988 | US4746169 Apparatus for excavating passages |
| 05/24/1988 | CA1236987A1 Method of rock bolting, and a device, and a roof bolting apparatus |
| 05/19/1988 | WO1988003599A1 Reactive composition and multiple-chamber cartridge, and process for anchoring a fastening element to the fastening base |
| 05/17/1988 | US4744699 To drill a bore in the roof of a mine |
| 05/10/1988 | CA1236493A1 Method of placing anchor members using a dowel compound |
| 04/27/1988 | EP0265283A1 Improved rock bolt |
| 04/27/1988 | CN87212094U Solid charge anchor rod for explosion anchor |
| 04/26/1988 | US4740037 Continuous mining machine |
| 04/14/1988 | DE3634095A1 Method and apparatus for stabilising friable rock formations in the head area of the face in underground mining |
| 04/13/1988 | EP0263803A1 Process and device for anchoring under tension |
| 03/24/1988 | WO1988002058A1 Rock anchor |
| 03/22/1988 | US4732510 Process for driving and cementing in ground anchors, apparatus and anchor bars for said process |
| 03/22/1988 | US4732509 Method and a device for feeding concrete into a drill hole in the concrete boiling of a rock |
| 03/22/1988 | US4732059 For a construction reinforcement bar in concrete |
| 03/16/1988 | EP0259755A1 Rock anchoring bolt |
| 03/16/1988 | CN87106078A Slit anchor mounting tool |
| 03/10/1988 | WO1988001677A1 Process and device for producing drilling holes from an angled position in relation to the drilling axes |
| 03/09/1988 | EP0259021A1 Anchor bolt assembly |
| 03/08/1988 | US4729696 Cartridge for use in fixing an anchor bolt and a method |
| 03/01/1988 | US4728219 Method of and a device for guiding a wire in the wire bolting of a rock |
| 02/24/1988 | CN87105613A Anchor bolt assembly |
| 02/23/1988 | CA1233037A2 Method of rock bolting and tube-formed expansion bolt |
| 02/16/1988 | US4725096 Method of and a device for carrying out wire bolting |
| 02/10/1988 | CN87105367A Reinforcing method and means |
| 02/09/1988 | US4723389 Method of placing anchor members using a dowel compound |
| 01/07/1988 | EP0251999A1 Anchor bolt anchorable by means of a hardening material |
| 12/09/1987 | EP0248457A1 Process for strengthening and sealing geological formations |
| 12/08/1987 | US4711502 Apparatus for cutting excavations having a substantially planar face |
| 12/03/1987 | DE3617702A1 Acrylate-based mortar |
| 12/02/1987 | EP0247778A1 Single-pass roof bolt and apparatus and method for installation |
| 12/01/1987 | US4710065 Method, a device and a means for carrying out wire bolting of a rock |
| 11/25/1987 | CN87200407U Connector at end of anchor stem made of wire rope |
| 11/24/1987 | US4708533 Method and a device for guiding a concrete feeding hose in connection with the grout feed in rock bolting |
| 11/24/1987 | US4708532 Apparatus for storing a concrete feeding hose in a rock bolting device |
| 11/17/1987 | US4706806 Destructible cartridge for anchoring rods or the like |
| 11/04/1987 | CN87203142U Detachable connecting device |
| 11/03/1987 | US4704053 Versatile roof bolt assembly |
| 10/14/1987 | EP0241451A1 Rock anchor |
| 10/14/1987 | EP0241230A1 Capsules of high alumina cement compositions |
| 10/08/1987 | WO1987005925A1 Process for strengthening and sealing geological formations |
| 10/06/1987 | US4697960 Method and apparatus for anchoring rock bolts and cables |
| 09/29/1987 | US4696606 Method of stabilizing a rock structure |
| 08/26/1987 | CN86208795U Hydraulic type installing device for pipe slot anchor bar |
| 07/28/1987 | CA1224633A1 Turret for roof bolting apparatus |
| 07/16/1987 | DE3600695A1 Method of inserting rock bolts and device for carrying out the method |
| 07/14/1987 | US4679966 Roof bolt apparatus with expansion shell and coupling |
| 06/30/1987 | US4676406 Squirt cartridge for mixing and dispensing a two-component mass |
| 06/17/1987 | CN86107172A Device for storing a wire in a wire bolting means |
| 06/17/1987 | CN86107168A Method and a device for guiding a concrete feeding hose in connection with the grout feed in rock bolting |
| 06/10/1987 | CN86107492A Method device and means for carrying out wire bolting of a rock |
| 06/10/1987 | CN86107480A Apparatus for storing concrete feeding hose in a rock bolting device |
| 06/09/1987 | US4671413 Pre-measured dry mix cement enclosed by water soluble material with water reservoir |
| 05/27/1987 | CN86107237A Method and device for feeding concrete into a drill hole in the concrete bolting of a rock |
| 05/13/1987 | CN86107284A Method of and a device for carrying out wire bolting |
| 05/13/1987 | CN86107254A Method of and a device for guiding a wire in the wire bolting of a rock |
| 05/12/1987 | US4664573 Mine wall support anchor |
| 05/12/1987 | US4664561 Combined resin-mechanical mine roof bolt anchor |
| 05/12/1987 | US4664555 Tension member for a rock anchor or the like |
| 05/06/1987 | EP0221020A2 Cartridge for curing materials |
| 05/05/1987 | US4662795 Method of supporting a mine roof using nut element with breakable portion |
| 04/30/1987 | DE3634502A1 Roof-bolting drilling apparatus |
| 04/28/1987 | US4661022 Rock bolt structure and installation |
| 04/21/1987 | US4659258 Dual stage dynamic rock stabilizing fixture and method of anchoring the fixture in rock formations |
| 04/21/1987 | CA1220639A1 Pushing tool |
| 04/07/1987 | US4655645 Method and apparatus for anchoring roof bolts |
| 04/07/1987 | US4655644 Binder-injecting rockbolt |
| 04/07/1987 | US4655643 For installation in an underground excavation to support the roof |
| 04/01/1987 | EP0216506A1 Roof bolting method |
| 03/31/1987 | US4653810 Pre-bolting system for underground mines |
| 03/24/1987 | US4652175 Process and device for securing a fastening member in a borehole |
| 03/24/1987 | US4651875 Anchoring, fasteners, bore holes, hardening, resins, thixotropy |
| 03/03/1987 | CA1218532A1 Method for inserting metal cables into holes drilled in the rock |
| 02/25/1987 | CN86200724U Ebullient shotcrete machine |
| 02/19/1987 | DE3528277A1 Anchor drilling apparatus for shafts |
| 02/17/1987 | US4643619 Apparatus for feeding cement material into a drill hole for cement bolting of a rock |
| 02/03/1987 | US4640369 Slide bar mining bolting machine |
| 01/06/1987 | US4634317 Method of rock bolting and tube-formed expansion bolt |
| 01/02/1987 | DE3545725C1 Roadway-support machine with integrated anchor-drilling and anchor-setting device |
| 12/30/1986 | US4632605 Method and apparatus for reinforcing and consolidating earth structures |
| 12/30/1986 | EP0207056A1 Device for drilling tunnels, shafts and the like |
| 12/30/1986 | EP0207030A1 Method of stabilizing a rock structure |
| 12/23/1986 | US4630971 Apparatus for anchoring rock and the like |
| 12/09/1986 | CA1214946A1 Method for anchoring a bolt in a rock-like structure |
| 12/03/1986 | EP0203907A1 Drill wagon for drilling excavation and rockbolt holes |
| 11/12/1986 | CA1213743A Method and equipment for performing rock bolting |
| 11/04/1986 | US4620406 Screen sleeve for use with a hardenable mass for securing an anchoring element |
| 10/29/1986 | EP0199671A2 Acrylic resin-based anchoring agent, and its use in anchorings |
| 10/29/1986 | CN85102144A Sealing apparatus for tubular useless drilling |
| 10/08/1986 | EP0196451A1 Tension element for a rock bolt or the like |
| 10/07/1986 | US4616050 Filler-containing hardenable resin products |
| 10/01/1986 | CN86201120U Concrete ejector with light rotor |
| 09/30/1986 | CA1211947A1 Method and apparatus for feeding cement material into a drill hole for cement bolting of a rock |
| 09/22/1986 | EP0125261A4 A method and apparatus for reinforcing and consolidating earth structures. |
| 09/09/1986 | US4610573 Tunneling machine |
| 09/02/1986 | US4609129 Device for injecting a fixing agent into a drilled hole for anchoring a fastening element inserted in the drilled hole |
| 08/13/1986 | EP0190460A1 Anchoring device for the traction member of an anchor, especially a rock anchor |
| 08/12/1986 | CA1209595A1 Long shelf life cementitious anchoring capsule |
| 08/05/1986 | CA1208947A1 Rock bolt |
| 07/23/1986 | EP0188174A1 Anchor for wall consolidation in cavity structures |
| 07/22/1986 | US4601614 For installation in a bore in the roof of underground excavation |