US3224202A - Anchoring device - Google Patents

Anchoring device Download PDF

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Publication number
US3224202A
US3224202A US195291A US19529162A US3224202A US 3224202 A US3224202 A US 3224202A US 195291 A US195291 A US 195291A US 19529162 A US19529162 A US 19529162A US 3224202 A US3224202 A US 3224202A
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US
United States
Prior art keywords
plate
anchoring
roof
face
deformable
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.)
Expired - Lifetime
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US195291A
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English (en)
Inventor
Durget Andre
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Anciens Etablissements Goldenberg et Cie
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Anciens Etablissements Goldenberg et Cie
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Expired - Lifetime legal-status Critical Current

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    • 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
    • E21D21/0086—Bearing plates
    • 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
    • E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material

Definitions

  • a boring is made in the ground and an anchoring device provided with an expanding head is inserted therein and fastened to the walls of the bore.
  • the expansion of this head is controlled by a rod extending out of the bore and bearing against a metal anchoring plate which bears against the face of the ground.
  • This face is most often irregular in shape and it is diflicult to achieve a sound contact between the face and the anchoring plate and yet the quality of this contact affects the efiiciency of the anchoring, since it is through the anchoring plate that the applied pressure is transmitted to the ground.
  • An insufficient contact is manifested by a bad distribution of the pressure which can reach very high local values. These cause the rocks of the ground to break up and this renders the anchoring uncertain.
  • An object of the invention is to remedy this drawback and to this end, invention provides a method of mounting anchoring devices in the ground, said method comprising interposing between the face of the ground in which the anchoring device is inserted and the anchoring plate against which said device bears, a coherent and deformable layer of an incompressible granular material which conforms to the shape of said face.
  • the layer of incompressible material forms a filling which molds itself to the face of the bore while insuring, due to its very nature, a full and uniform transmission of the pressure exerted by the anchoring device.
  • the granular material employed to form this layer is advantageously sand agglomerated by any suitable binder.
  • This layer can be placed in position when anchoring or previously provided on the anchoring plate itself.
  • the latter provides an anchoring plate having on the face thereof adapted to come in contact with the ground a coherent and deformable layer of an incompressible granular material molded on the plate.
  • FIG. 2 is a view similar to FIG. 1 on an enlarged scale of a detail of FIG. 1 illustrating one manner of carrying out the method of the invention
  • FIG. 3 is an axial sectional view of a plate provided with a filling layer according to the invention.
  • FIG. 4 is a view of the plate shown in FIG. 3 in service.
  • FIGS. 5-8 are views similar to FIG. 4 of four modifications of the plate according to the invention.
  • FIG. 1 shows a mine gallery 1 having a roof 2 in which are provided bores 3 through soft layers 4 of the ground so as to reach a hard layer 5.
  • An anchoring device A is inserted in each of these bores.
  • This device comprises an expanding head 6 that a rod 7 causes to expand when it is subjected to a tractive force by a nut 8 which is threadedly engaged on its outer screwthreaded end. To achieve this traction the nut 8 bears against a saucershaped plate P through which extends the rod 7 and which bears against the face of the bore.
  • the head 6 thus fastens itself into the hard layer of the ground and the anchoring device supports the subjacent soft layers.
  • This method is known as a suspended roof support or roof bolting.
  • the layer C is composed of an incompressible granular material rendered coherent.
  • This material is advantageously sand agglomerated by any suitable plastic-type binder such as bitumen, rubberized binder or other plastic material binder.
  • suitable plastic-type binder such as bitumen, rubberized binder or other plastic material binder.
  • bitumen e.g., bitumen, rubberized binder or other plastic material binder.
  • bitumen e.g., bitumen of grade 40-60.
  • a rubber latex could also be used as the binder.
  • the aforementioned indications are purely illustrative, since a large number of commercially available binders can be used, even sand having a different grain size.
  • sand is preferred owing to its abundance and low cost, granulated materials having similar properties could be substituted therefor.
  • the interposed layer C results in a close contact between the plate P and the face 2 of the bore, since when the nut 8 is screwed along the rod this layer molds itself to the face 2 and fits around the asperities. Owing to its very nature the layer 2 wholly and uniformly transmits all the pressures exerted thereon by the plate P.
  • the first method is that shown in FIG. 2 and comprises applying the layer C when anchoring by spreading the agglomerated granular material over the saucer-shaped plate P.
  • the other method is that shown in FIGS. 3-8 in which the layer C is previously applied on the anchorin-g plate with which it constitutes a unit.
  • This second method has the advantage for the operator of not com-' FIG. 3 shows a saucer-shaped plate P having a profile different to the late P and in which the layer C is applied by molding. It will be noted that the passage 9a for the passage of the rod 7 is more tapered than in the preceding embodiment and this precludes jamming of the threading of this rod.
  • FIG. 4 shows the plate illustrated in FIG. 3 placed in position, the upper face of the layer C, which was initially flat, having been caused to conform to the face 2 of the bore in the course of the screwing of the nut 8 along the rod 7.
  • FIG. 5 shows another type of saucer-shaped plate P whose layer C has been previously applied on the plate. This permits providing at the upper end of the passage 9b a part-conical recess 11 forming a free space for the flow of the material of which the layer C is composed.
  • the saucer-shaped plate P shown in FIG. 6 has a central portion '12 in'the form of a hollow conical dome connected to the periphery of the plate by a pressed out intermediate portion 13.
  • This arangement is adapted in the known manner to provide a controlled deformability of the plate P Further, it allows a suitable orientation of the anchoring device in the case of an inclined bore 3.
  • a washer 14 is inserted in the dome 12 between the hole in the latter and the nut 8.
  • This washer is capable of blocking itself in the dome in accordance with the orientation of the rod relative to the axis of the hole 10 so as' to adapt itself to the inclination of the bore 3 relative to the face 2 of the ground.
  • FIG. 7 shows a saucer-shaped plate P also permitting an orientation of the rod 7 in accordance with the inclina-' tion of the bore 3 which is shown greatly inclined relative to the face 2.
  • the plate P comprises a central hemispherical boss provided with a large slot 16 in a diametral dane.
  • Disposed on the boss 15 is a washer 17 also hemispherical in shape, the boss 15 and the washer 17 constituting a swivel joint assembly.
  • the passage 9d formed in the layer C in alignment with the slot 16 has a sufiicient extent to permit all the possible angular movements of the rod 7 in the course of the swiveling of the latter.
  • FIG. 8 shows a saucer-shaped plate P also permitting a suitable orientation of the rod 7.
  • the plate P comprises a central bearing portion 18 in which is rotatably mounted a cup 19 provided with a slot 20 in a diametral plane.
  • the nut bears on the cup 19 through the medium of a curved washer 21.
  • the passage 9c has a great extent.
  • the layer C affords various additional advantages.
  • the bores 3 from the atmosphere of the galleries 1 which, especially in the case of marls, diminishesthe danger of swelling owing to entry of air.
  • the relative fluidtightness thus obtained precludes the trickling onto the plates often observed at the present time.
  • the corrosion of the plates is reduced owing to the interposition of the inert material of the layer C between the roof and the plates.
  • An anchoring device comprising a saucer-shaped anchoring plate having a centural opening therein, an anchoring member extending through said opening and adapted to engage in a ground-constituted roof to suspend said plate therefrom, said plate having a face in facing relation with the ground-constituted roof, and a coherent, solid and plastic-type deformable mass on said face of the plate, said mass being constituted by an incompressible and non-deformable granular material and a plastic-type deformable binder in which the granular material is embeded, said mass having a thickness whereby to project from the plate for encountering and conforming to the contourof said roof and preventing the plate from encountering the roof, said mass being generally I shape retaining but being deformable under compression to the extent permitted by compacting said non-deformable material, said binder being bitumen.
  • An anchoring device comprising a saucer-shaped anchoring plate having a central opening therein, an anchoring member extending through said opening and adapted to engage in a ground-constituted roof to suspend said plate therefrom, said plate having a face in facing relation with the ground-constituted roof, and a coherent, solid and plastic-type deformable mass on said face of the plate, said mass being constituted by an incompressible and non-deformable granular material and a plastic-type deformable binder in which the granular material is embedded, said mass having a thickness whereby to project from the plate for encountering and conforming to the contour of said roof and preventing the plate from encountering the roof, said mass being generally shape retaining but being deformable under compression to the extent permitted by compacting said non-deformable material, said binder being a rubberized binder.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Piles And Underground Anchors (AREA)
US195291A 1961-05-23 1962-05-16 Anchoring device Expired - Lifetime US3224202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR862583A FR1297817A (fr) 1961-05-23 1961-05-23 Procédé pour la mise en place de dispositifs d'ancrage dans un terrain et plaques d'ancrage pour sa mise en oeuvre

Publications (1)

Publication Number Publication Date
US3224202A true US3224202A (en) 1965-12-21

Family

ID=8755681

Family Applications (1)

Application Number Title Priority Date Filing Date
US195291A Expired - Lifetime US3224202A (en) 1961-05-23 1962-05-16 Anchoring device

Country Status (6)

Country Link
US (1) US3224202A (es)
BE (1) BE617688A (es)
ES (1) ES277812A1 (es)
FR (1) FR1297817A (es)
GB (1) GB968630A (es)
LU (1) LU41736A1 (es)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143534A2 (en) * 1983-09-29 1985-06-05 The Eastern Co. Mine roof support system
US4618290A (en) * 1983-06-27 1986-10-21 Hansen Roger M Precast roof bearing block
US5288178A (en) * 1991-12-18 1994-02-22 Hl&H Timber Products (Pty) Ltd. Preload headboard for an elongate prop
US5769570A (en) * 1996-06-03 1998-06-23 Jennmar Corporation Cable tensioning dome plate
US6074134A (en) * 1997-02-14 2000-06-13 Jennmar Corporation Tensionable cable bolt
US6146056A (en) * 1998-01-14 2000-11-14 Jennmar Corporation Channel and bearing plate assembly
US6270290B1 (en) 1997-02-14 2001-08-07 Jennmar Corporation Tensionable cable bolt
US6682268B2 (en) * 2000-09-01 2004-01-27 Earl Products, Inc. Method and apparatus for secondary roof support in an underground mine
US20050013672A1 (en) * 2003-07-14 2005-01-20 Slater Bert W. Roof bolt bearing plate and method for an underground mine
EP1933005A1 (de) 2006-12-16 2008-06-18 Kovari, Kalman, Prof. Dr. Verankerungseinrichtung zum Stabilisieren des Baugrundes
US20140099167A1 (en) * 2011-03-17 2014-04-10 Louie Zeitler Mine roof bolt assembly
US10036251B2 (en) * 2012-02-22 2018-07-31 Fci Holdings Delaware, Inc. Fiberglass roof and rib plate

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1499940A (fr) * 1966-04-22 1967-11-03 Dispositif de soutènement des parois rocheuses
US4518282A (en) * 1981-08-27 1985-05-21 Republic Corporation Mine roof bearing plate with embossed area having conical and cylindrical sections
GB2153474A (en) * 1984-01-27 1985-08-21 Phillips Drill Co Wall anchor
GB2153947A (en) * 1984-02-04 1985-08-29 Rolls Royce Attachment means between a strut and a skin
US4775266A (en) * 1986-12-22 1988-10-04 Seegmiller Ben L Structure and method for deterring cutter roof failure
AT388408B (de) * 1987-09-17 1989-06-26 Sfs Stadler Ag Unterlegscheibe
FR2694590B1 (fr) * 1992-08-04 1994-10-21 Prospection & Inventions Dispositif de fixation de plaques de parement à un mur.
DE29703416U1 (de) * 1997-02-26 1997-04-24 Radtke, Johannes, 47447 Moers Ankerplatte
US5803693A (en) * 1997-04-17 1998-09-08 Olympic Manufacturing Group, Inc. Swiveling roofing washer
WO2011033110A2 (de) * 2009-09-18 2011-03-24 Fm Kunststofftechnik Gmbh Verbindungselement für eine halterung für ein regeneratives energiemodulsystem

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1817033A (en) * 1926-03-11 1931-08-04 Belle B Gellner Incinerator
US2000978A (en) * 1935-05-14 moseley
US2603573A (en) * 1945-08-23 1952-07-15 Shell Dev Bituminous mixtures and processes for their preparation
US2682152A (en) * 1950-04-15 1954-06-29 Bierer Joseph Method of and apparatus for reinforcing and supporting mine roofs and the like
DE924624C (de) * 1953-08-12 1955-03-07 Consolidation Bergbau Ag Als Zuganker ausgebildeter Bohrlochanker fuer den Grubenausbau
US2748594A (en) * 1952-11-04 1956-06-05 Lukens Steel Co Roof bolt
FR1222640A (fr) * 1959-01-17 1960-06-10 Perfectionnements apportés aux dispositifs de soutènement de toits de mine, ou de souterrains ou analogues, comportant au moins un boulon d'ancrage
GB842078A (en) * 1958-03-03 1960-07-20 Anciens Ets Goldenberg & Cie Improvements in and relating to anchoring-bolt devices and to support plates therefor
US3086421A (en) * 1958-08-29 1963-04-23 Illinois Tool Works Sheet metal nut having regular polygonal opening with helically deflected edges

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2000978A (en) * 1935-05-14 moseley
US1817033A (en) * 1926-03-11 1931-08-04 Belle B Gellner Incinerator
US2603573A (en) * 1945-08-23 1952-07-15 Shell Dev Bituminous mixtures and processes for their preparation
US2682152A (en) * 1950-04-15 1954-06-29 Bierer Joseph Method of and apparatus for reinforcing and supporting mine roofs and the like
US2748594A (en) * 1952-11-04 1956-06-05 Lukens Steel Co Roof bolt
DE924624C (de) * 1953-08-12 1955-03-07 Consolidation Bergbau Ag Als Zuganker ausgebildeter Bohrlochanker fuer den Grubenausbau
GB842078A (en) * 1958-03-03 1960-07-20 Anciens Ets Goldenberg & Cie Improvements in and relating to anchoring-bolt devices and to support plates therefor
US3086421A (en) * 1958-08-29 1963-04-23 Illinois Tool Works Sheet metal nut having regular polygonal opening with helically deflected edges
FR1222640A (fr) * 1959-01-17 1960-06-10 Perfectionnements apportés aux dispositifs de soutènement de toits de mine, ou de souterrains ou analogues, comportant au moins un boulon d'ancrage

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618290A (en) * 1983-06-27 1986-10-21 Hansen Roger M Precast roof bearing block
EP0143534A2 (en) * 1983-09-29 1985-06-05 The Eastern Co. Mine roof support system
EP0143534A3 (en) * 1983-09-29 1986-05-14 The Eastern Co. Mine roof support system
US5288178A (en) * 1991-12-18 1994-02-22 Hl&H Timber Products (Pty) Ltd. Preload headboard for an elongate prop
US5769570A (en) * 1996-06-03 1998-06-23 Jennmar Corporation Cable tensioning dome plate
US6074134A (en) * 1997-02-14 2000-06-13 Jennmar Corporation Tensionable cable bolt
US6270290B1 (en) 1997-02-14 2001-08-07 Jennmar Corporation Tensionable cable bolt
US6146056A (en) * 1998-01-14 2000-11-14 Jennmar Corporation Channel and bearing plate assembly
US6682268B2 (en) * 2000-09-01 2004-01-27 Earl Products, Inc. Method and apparatus for secondary roof support in an underground mine
US20040115010A1 (en) * 2000-09-01 2004-06-17 Robertson Roy Lee Apparatus for providing secondary mine roof support
US20050013672A1 (en) * 2003-07-14 2005-01-20 Slater Bert W. Roof bolt bearing plate and method for an underground mine
US6957931B2 (en) 2003-07-14 2005-10-25 Slater Bert W Roof bolt bearing plate and method for an underground mine
EP1933005A1 (de) 2006-12-16 2008-06-18 Kovari, Kalman, Prof. Dr. Verankerungseinrichtung zum Stabilisieren des Baugrundes
US20140099167A1 (en) * 2011-03-17 2014-04-10 Louie Zeitler Mine roof bolt assembly
US8894328B2 (en) * 2011-03-17 2014-11-25 Louie Zeitler Mine roof bolt assembly
US10036251B2 (en) * 2012-02-22 2018-07-31 Fci Holdings Delaware, Inc. Fiberglass roof and rib plate

Also Published As

Publication number Publication date
LU41736A1 (es) 1962-07-18
GB968630A (en) 1964-09-02
FR1297817A (fr) 1962-07-06
BE617688A (fr) 1962-08-31
ES277812A1 (es) 1962-10-16

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