EP0196451A1 - Elément de tension pour un boulon d'ancrage de roche ou similaire - Google Patents
Elément de tension pour un boulon d'ancrage de roche ou similaire Download PDFInfo
- Publication number
- EP0196451A1 EP0196451A1 EP86102426A EP86102426A EP0196451A1 EP 0196451 A1 EP0196451 A1 EP 0196451A1 EP 86102426 A EP86102426 A EP 86102426A EP 86102426 A EP86102426 A EP 86102426A EP 0196451 A1 EP0196451 A1 EP 0196451A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tension member
- member according
- steel wires
- synthetic resin
- tension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 12
- 239000000057 synthetic resin Substances 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 238000010924 continuous production Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229920001225 polyester resin Polymers 0.000 claims description 4
- 239000004645 polyester resin Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000012815 thermoplastic material Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
Definitions
- the invention relates to a tension member for a rock bolt or the like and a method for its manufacture.
- Rock bolts essentially have the task of securing rock packs against displacements as early as possible when opening cavities in a naturally occurring mountain range with fissures.
- a typical type of stress of such rock bolts is a combined tensile and shear stress with large shear paths.
- Tension members that are used as rock bolts must therefore have a high work capacity in order to be able to take part in the large bends.
- the stiffness of a solid cross-section, e.g. a steel rod is an obstacle.
- tubular tension members made of steel with a thin wall, e.g. be pressed against the borehole wall by means of hydraulic pressure and transmit the force by friction.
- Tubular tension members of this type have an even lower shear resistance than rod-shaped anchors; however, they allow a greater shear path, since the cavity of the borehole remains essentially free.
- Tubular tension members have no corrosion protection and cannot be produced in any lengths. Anchoring bodies cannot be attached to their smooth outer surface.
- the invention has for its object to provide a tension member for a rock bolt, which can be produced economically in any length, has a high work capacity to be able to take strong bends and also gives the possibility of anchoring body, e.g. to be able to attach in the form of threaded nuts or the like.
- a tension member which consists of a bundle of, leaving a central cavity in a tubular body made of a hardening, plastic material, e.g. Resin embedded steel wires, the tubular body has a profile on the outer circumference.
- the steel wires are expediently arranged in a radially symmetrical manner in the tubular body, which itself advantageously has a circular cross section.
- the central cavity also expediently has a circular cross section.
- the profiling of the tension member on its outer surface which can also be seen on a covering of the tubular body, e.g. can be formed from a thermoplastic synthetic resin, in particular if it is designed as a screw thread, for fixing the tension member to the head by means of an appropriately designed anchoring body.
- a bracing in relation to the surface of the underground cavity is generally sufficient, since only a force-fit connection to this surface is usually required for the rock bolt to be effective
- the central cavity of the tension member if it is still open after it has been installed in the borehole, allows control of possible shear movements or the insertion of measuring probes. It can also be used to inject a hardening material into the borehole or to vent if hardening material is injected in another way. It is expedient if at least in partial areas of the length of the tension member along at least one surface line from the central cavity outward openings are provided, which can be valve-shaped.
- the profiling of the outer surface of the tension member can also only extend over partial regions of its length, while regions with a smooth outer surface are provided between the regions provided with a profiling.
- a tension member according to the invention also provides excellent protection against corrosion, since the steel wires are completely embedded in synthetic resin; This is especially true when it is surrounded by a sheath. Tension members of this type can therefore also be used as permanent anchors and thus promote the path to a single-shell expansion of the underground cavity.
- the invention relates to a method for producing such a tension member.
- an inner tube made of thermoplastic synthetic resin, e.g. PE, manufactured Even before the material of the inner tube has hardened, the steel wires are then fed along its outer surface and pressed into its surface. These steel wires are then passed through a plastic, hardening mass, e.g. a polyester resin, encased Finally, either in the course of this process or in a separate subsequent process step, e.g. Cover made of a thermoplastic material, such as PVC, applied
- the particular advantage of the method is that it is possible in this way to produce a tension member for a rock bolt in a continuous process, which can be cut to any length and, if the profile is formed on its outer surface as a screw thread, also screwing one Anchoring body allowed at any point
- Fig. 1 shows in longitudinal section, Fig. 2 in plan view and Fig. 3 in cross section a rock bolt with a tension member according to the invention.
- the tension member 1 consists in this embodiment of a total of eight steel wires 2, which in a tubular body 3 made of a hardening mass, e.g. are embedded from a synthetic resin, preferably polyester resin.
- a central cavity 4 In the interior of the tubular body 3 there is a central cavity 4; its outer surface has a profile 5, e.g. in the form of a coarse thread that is used to screw on an anchoring body, e.g. a mother.
- the tension member 1 is inserted into a borehole 6, which can of course be inclined in any direction to the underground cavity to be secured and at the bottom of the drilling hole by a hardening material 7, e.g. a synthetic resin or cement mortar, fixed
- a hardening material e.g. a synthetic resin or cement mortar
- This hardening material can, as is customary in so-called synthetic resin adhesive anchors, be introduced in the form of a cartridge containing two adhesive components into the borehole 6, which is destroyed when the tension member is inserted, thereby activating the adhesive.
- the hardening material can also be injected either through the central cavity 4 or directly into the outer annular space; in the latter case, the central cavity 4 can serve as a vent line.
- the tension member 1 is fixed by an anchoring body 8 with a countersunk screw part 9 ′, which is supported by means of a flanged edge 9 ′′ against an abutment plate 10 with a central opening 11.
- the abutment plate 10 is bent open in the region of the opening 11, whereby This recessed arrangement of the screw part 9 'of the anchoring body 8 has the advantage that the screw part 9', which must have a great length due to the lower strength of the tubular body 3 compared to steel, does not have this length Length inwardly protrudes into the surface of the underground cavity
- the tension member according to the invention which can have lengths of 4 to 6 m, optionally also up to 8 m, consists, for example, with an outer diameter of approximately 2 5 mm, from steel wires with a 6 mm diameter; the central cavity 4 then has a diameter of 9 mm.
- the tension member can be produced, for example, by extrusion, the wires having to be fed laterally to the extrusion head in order to be able to completely encase them.
- FIGS. 5 to 7 A particularly advantageous possibility for producing a tension member according to the invention is shown in individual phases in FIGS. 5 to 7.
- the wires 2 are fed in from the outside in the radial direction and are pressed into the circumferential surface of the inner tube 3' in a regular sequence along the outer circumference (FIG. 6).
- the wires 2 are enveloped by the hardening mass 3 ′′, for example a reactive synthetic resin such as a polyester resin or the like.
- an outer sheath tube 12 made of a thermoplastic material, for example PVC, can be extruded onto this Embodiment, this outer cladding tube 12 has the coarse thread, which is used to screw on the anchoring nut
- FIG. 8 Another embodiment of the invention is shown in FIG. 8.
- the tension member 1 ' which here serves as a rock bolt analogously to FIG. 1 , is not provided with a thread over its entire length, but only over partial areas 13, which are each interrupted by areas 14 with a smooth surface.
- the threaded areas 13 form anchors with respect to the hardening material 7 filling the full length of the borehole 6.
- the smooth areas 14 do not form a bond with the hardening material 8, so that the tension member 1 'between the areas 14 the intermediate anchors 13 can stretch more.
- the tubular body 3, in which the wires 2 are embedded, can also be provided with radial openings in the areas between the steel wires 2. These openings, which can also be arranged only in partial areas over the length of the tension member, serve as injection and / or ventilation openings. Injecting the annulus remaining in the borehole after insertion of the tension member with a hardening material, e.g. Cement mortar, can be done through the central cavity and through the openings. In order to subsequently clear the central cavity again, the injection material remaining in it can be rinsed out.
- a hardening material e.g. Cement mortar
- the openings can also be valve-shaped, for example in such a way that they serve as ventilation openings when the annular space is injected through a separate injection line arranged therein. Allow only the enclosed air to escape from the outer annular space to the central cavity, but not the injection material or water separated from it.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Joining Of Building Structures In Genera (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Dowels (AREA)
- Pens And Brushes (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Adhesives Or Adhesive Processes (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86102426T ATE36893T1 (de) | 1985-03-05 | 1986-02-25 | Zugglied fuer einen felsbolzen oder dergleichen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853507732 DE3507732A1 (de) | 1985-03-05 | 1985-03-05 | Zugglied fuer einen felsbolzen oder dergleichen |
DE3507732 | 1985-03-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0196451A1 true EP0196451A1 (fr) | 1986-10-08 |
EP0196451B1 EP0196451B1 (fr) | 1988-08-31 |
Family
ID=6264238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86102426A Expired EP0196451B1 (fr) | 1985-03-05 | 1986-02-25 | Elément de tension pour un boulon d'ancrage de roche ou similaire |
Country Status (9)
Country | Link |
---|---|
US (1) | US4664555A (fr) |
EP (1) | EP0196451B1 (fr) |
JP (1) | JPS61207800A (fr) |
AT (1) | ATE36893T1 (fr) |
AU (1) | AU565512B2 (fr) |
CA (1) | CA1270129A (fr) |
DE (1) | DE3507732A1 (fr) |
NO (1) | NO860728L (fr) |
ZA (1) | ZA861450B (fr) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2194828A (en) * | 1986-08-22 | 1988-03-16 | Australian Coal Ind Res | Anchoring dowel |
DE3905128A1 (de) * | 1988-07-06 | 1990-01-11 | Willich F Gmbh & Co | Vollverklebbarer seilanker |
EP0379388A2 (fr) * | 1989-01-23 | 1990-07-25 | Inco Limited | Boulon d'ancrage creux en câbles |
EP0726383A1 (fr) * | 1995-02-09 | 1996-08-14 | SIREG S.P.A. Società Italiana di Ricerca Elementi per Geotecnica | Douille d'ancrage à injection pour les tunnels et les tranchées |
US5929736A (en) * | 1996-08-31 | 1999-07-27 | Toyo Denso Kabushiki Kaisha | Engine igniting coil device and method of winding an ignition coil |
US6060973A (en) * | 1995-08-25 | 2000-05-09 | Nippondenso Co., Ltd. | Slant winding electromagnetic coil and ignition coil for internal combustion engine using same |
US6069549A (en) * | 1996-08-07 | 2000-05-30 | Sagem S.A. | Winding, particularly for a high-voltage ignition coil circuit |
DE10100715A1 (de) * | 2001-01-10 | 2002-07-11 | Wolfgang Habe | Zuganker zum Stabilisieren eines Wandkörpers |
WO2008130415A1 (fr) * | 2007-04-19 | 2008-10-30 | Jennmar Corporation | Boulon au toit de mine avec surface d'ajustement de résine |
US7736738B2 (en) | 2003-12-17 | 2010-06-15 | Terrasimco Inc. | Coated mining bolt |
CN102400699A (zh) * | 2011-11-18 | 2012-04-04 | 山东科技大学 | 竹节式高强锚杆 |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3620972A1 (de) * | 1986-06-23 | 1988-01-14 | Hilti Ag | Mittels einer aushaertenden masse verankerbare ankerstange |
DE3629365A1 (de) * | 1986-08-29 | 1988-03-03 | Hausherr & Soehne Rudolf | Flexibler gebirgsanker |
DE3713291A1 (de) * | 1987-04-18 | 1988-11-03 | Dyckerhoff & Widmann Ag | Gebirgsanker zur sicherung von strecken und raeumen im berg- und tunnelbau |
DE3919103A1 (de) * | 1989-06-10 | 1990-12-13 | Ruhrkohle Ag | Seilankerschonende ankerplatte |
DE4032682C2 (de) * | 1990-10-15 | 1994-03-17 | Gd Anker Gmbh & Co Kg | Gebirgsanker |
JP2501780B2 (ja) * | 1991-05-22 | 1996-05-29 | 建設基礎エンジニアリング株式会社 | アンカ― |
JPH0733664B2 (ja) * | 1991-06-10 | 1995-04-12 | 建設基礎エンジニアリング株式会社 | アンカー |
DE4203740C2 (de) * | 1992-02-09 | 1996-07-11 | Dyckerhoff & Widmann Ag | Verfahren zum Herstellen eines Ankerelementes aus einer Litze aus verdrillten Stahldrähten |
US5387060A (en) * | 1993-03-26 | 1995-02-07 | F. M. Locotos Equipment & Design Co. | Tubular mining bolt |
DE9317336U1 (de) * | 1993-11-12 | 1994-01-27 | Buddenberg, Heinrich, 47447 Moers | Injektionsseilanker |
AUPO220596A0 (en) * | 1996-09-09 | 1996-10-03 | Geosystems | Cable bolt |
FR2775011B1 (fr) * | 1998-02-16 | 2000-03-31 | Spie Batignolles Construction | Procede d'ancrage direct ou indirect d'equipements sur un radier existant et dispositifs pour sa mise en oeuvre |
AT408473B (de) | 1998-10-20 | 2001-12-27 | Vorspann Technik Gmbh | Anker sowie bohrloch mit gesetztem anker |
CA2622806C (fr) * | 2007-02-28 | 2016-05-03 | Jennmar Corporation | Ancrage par cable ameliore |
DE102008014700A1 (de) * | 2008-03-18 | 2009-09-24 | Dywidag-Systems International Gmbh | Korrosionsgeschützter Selbstbohranker sowie Verfahren zu dessen Herstellung |
MX346834B (es) | 2010-06-24 | 2017-04-03 | Nucor Corp | Un perno de anclaje roscado de ajuste tensor. |
US9010165B2 (en) | 2011-01-18 | 2015-04-21 | Nucor Corporation | Threaded rebar manufacturing process and system |
CN102587943B (zh) * | 2012-03-19 | 2014-03-05 | 河南理工大学 | 一种顶板离层区树脂锚固剂快速安装方法 |
US10941657B2 (en) * | 2016-07-12 | 2021-03-09 | Fci Holdings Delaware, Inc. | Corrosion resistant yieldable bolt |
CN108746466B (zh) * | 2018-06-27 | 2020-04-14 | 芜湖金宇紧固件有限公司 | 一种提高螺钉整体韧性的加工工艺 |
CN109098742B (zh) * | 2018-08-20 | 2019-11-08 | 中国矿业大学 | 一种单锚集注式全长锚固的钢丝束及其支护方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2749068A1 (de) * | 1977-11-02 | 1979-05-03 | Gebirgssicherung Gmbh | Gebirgsanker |
EP0015895A1 (fr) * | 1979-03-05 | 1980-09-17 | EDARCO European Development and Research Company Ltd. | Tirant pour l'ancrage d'éléments de construction dans un corps de fondement |
FR2516975A1 (fr) * | 1981-11-25 | 1983-05-27 | Bergwerksverband Gmbh | Boulon d'ancrage |
DE3322346C1 (de) * | 1983-06-22 | 1984-09-13 | Klöckner-Becorit GmbH, 4620 Castrop-Rauxel | Gebirgsanker |
DE3320460C1 (de) * | 1983-06-07 | 1984-10-18 | Thyssen Industrie Ag, 4300 Essen | Nachgiebiger Gebirgsanker |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1184567B (de) * | 1961-02-24 | 1964-12-31 | Jerome Bernard Clifford Dumont | Wellschlauch aus flexiblem Werkstoff |
US3477474A (en) * | 1967-03-22 | 1969-11-11 | American Chain & Cable Co | Wire reinforced conduit |
FR1539176A (fr) * | 1967-08-03 | 1968-09-13 | Soletanche | Dispositif de tirant destiné à être ancré dans le sol |
US3653217A (en) * | 1970-08-03 | 1972-04-04 | Chester I Williams | Rock bolt rod configuration |
DE2041526C3 (de) * | 1970-08-21 | 1980-06-04 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Zugglied für einen Verpreßanker |
US3842608A (en) * | 1972-11-28 | 1974-10-22 | L Turzillo | Method and means for installing load bearing piles in situ |
SE387700B (sv) * | 1973-03-09 | 1976-09-13 | A I Lundkvist | Perforerat hylsformigt organ for anvendande vid s.k. bergfestning medelst i borrhal ingjuten bult |
US4196755A (en) * | 1977-09-19 | 1980-04-08 | Automation Industries, Inc. | Reinforced flexible duct with integral molded liner |
DE2856735A1 (de) * | 1978-12-29 | 1980-07-10 | Hilti Ag | Zweikomponenten-klebepatrone |
US4302131A (en) * | 1979-06-18 | 1981-11-24 | Fosroc International Limited | Anchor elements |
US4410476A (en) * | 1980-10-20 | 1983-10-18 | The United States Of America As Represented By The Secretary Of The Navy | Method for making radially compliant line array hose |
DE3115062C2 (de) * | 1981-04-14 | 1986-07-10 | Stump Bohr Gmbh, 8045 Ismaning | Daueranker |
JPS599643Y2 (ja) * | 1981-07-15 | 1984-03-27 | 川澄化学工業株式会社 | 輸液バツグ |
US4564315A (en) * | 1983-07-05 | 1986-01-14 | Rozanc Richard C | Method for anchoring a bolt in a rock-like structure |
-
1985
- 1985-03-05 DE DE19853507732 patent/DE3507732A1/de active Granted
-
1986
- 1986-02-25 EP EP86102426A patent/EP0196451B1/fr not_active Expired
- 1986-02-25 AT AT86102426T patent/ATE36893T1/de active
- 1986-02-26 ZA ZA861450A patent/ZA861450B/xx unknown
- 1986-02-27 NO NO860728A patent/NO860728L/no unknown
- 1986-03-03 US US06/835,533 patent/US4664555A/en not_active Expired - Fee Related
- 1986-03-04 AU AU54249/86A patent/AU565512B2/en not_active Ceased
- 1986-03-04 JP JP61045497A patent/JPS61207800A/ja active Granted
- 1986-03-04 CA CA000503234A patent/CA1270129A/fr not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2749068A1 (de) * | 1977-11-02 | 1979-05-03 | Gebirgssicherung Gmbh | Gebirgsanker |
EP0015895A1 (fr) * | 1979-03-05 | 1980-09-17 | EDARCO European Development and Research Company Ltd. | Tirant pour l'ancrage d'éléments de construction dans un corps de fondement |
FR2516975A1 (fr) * | 1981-11-25 | 1983-05-27 | Bergwerksverband Gmbh | Boulon d'ancrage |
DE3320460C1 (de) * | 1983-06-07 | 1984-10-18 | Thyssen Industrie Ag, 4300 Essen | Nachgiebiger Gebirgsanker |
DE3322346C1 (de) * | 1983-06-22 | 1984-09-13 | Klöckner-Becorit GmbH, 4620 Castrop-Rauxel | Gebirgsanker |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2194828A (en) * | 1986-08-22 | 1988-03-16 | Australian Coal Ind Res | Anchoring dowel |
DE3905128A1 (de) * | 1988-07-06 | 1990-01-11 | Willich F Gmbh & Co | Vollverklebbarer seilanker |
DE3905128C2 (de) * | 1988-07-06 | 1998-07-09 | Willich F Gmbh & Co | Vollverklebbarer Seilanker |
EP0379388A2 (fr) * | 1989-01-23 | 1990-07-25 | Inco Limited | Boulon d'ancrage creux en câbles |
EP0379388A3 (fr) * | 1989-01-23 | 1991-03-13 | Inco Limited | Boulon d'ancrage creux en câbles |
EP0726383A1 (fr) * | 1995-02-09 | 1996-08-14 | SIREG S.P.A. Società Italiana di Ricerca Elementi per Geotecnica | Douille d'ancrage à injection pour les tunnels et les tranchées |
US6252483B1 (en) | 1995-08-25 | 2001-06-26 | Nippondenso Co., Ltd. | Slant winding electromagnetic coil and ignition coil for internal combustion engine using same |
US6060973A (en) * | 1995-08-25 | 2000-05-09 | Nippondenso Co., Ltd. | Slant winding electromagnetic coil and ignition coil for internal combustion engine using same |
US6069549A (en) * | 1996-08-07 | 2000-05-30 | Sagem S.A. | Winding, particularly for a high-voltage ignition coil circuit |
US5929736A (en) * | 1996-08-31 | 1999-07-27 | Toyo Denso Kabushiki Kaisha | Engine igniting coil device and method of winding an ignition coil |
DE10100715A1 (de) * | 2001-01-10 | 2002-07-11 | Wolfgang Habe | Zuganker zum Stabilisieren eines Wandkörpers |
US7736738B2 (en) | 2003-12-17 | 2010-06-15 | Terrasimco Inc. | Coated mining bolt |
US8685303B2 (en) | 2003-12-17 | 2014-04-01 | Terrasimco Inc. | Coated mining bolt |
WO2008130415A1 (fr) * | 2007-04-19 | 2008-10-30 | Jennmar Corporation | Boulon au toit de mine avec surface d'ajustement de résine |
US7566189B2 (en) | 2007-04-19 | 2009-07-28 | Jennmar Corporation | Mine roof bolt with resin control surface |
CN102400699A (zh) * | 2011-11-18 | 2012-04-04 | 山东科技大学 | 竹节式高强锚杆 |
Also Published As
Publication number | Publication date |
---|---|
ZA861450B (en) | 1986-10-29 |
DE3507732C2 (fr) | 1987-12-10 |
NO860728L (no) | 1986-09-08 |
US4664555A (en) | 1987-05-12 |
JPH0519640B2 (fr) | 1993-03-17 |
DE3507732A1 (de) | 1986-09-18 |
JPS61207800A (ja) | 1986-09-16 |
ATE36893T1 (de) | 1988-09-15 |
CA1270129A (fr) | 1990-06-12 |
AU565512B2 (en) | 1987-09-17 |
AU5424986A (en) | 1986-09-11 |
EP0196451B1 (fr) | 1988-08-31 |
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DE2627524C3 (de) | Verpreßanker | |
EP0014426B1 (fr) | Ancre de roche | |
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