WO2011087948A1 - Boulon expansible taraudeur - Google Patents

Boulon expansible taraudeur Download PDF

Info

Publication number
WO2011087948A1
WO2011087948A1 PCT/US2011/020309 US2011020309W WO2011087948A1 WO 2011087948 A1 WO2011087948 A1 WO 2011087948A1 US 2011020309 W US2011020309 W US 2011020309W WO 2011087948 A1 WO2011087948 A1 WO 2011087948A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
borehole
drill
rock bolt
bolt
Prior art date
Application number
PCT/US2011/020309
Other languages
English (en)
Inventor
Anthony John Spencer Spearing
Original Assignee
Anthony John Spencer Spearing
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anthony John Spencer Spearing filed Critical Anthony John Spencer Spearing
Publication of WO2011087948A1 publication Critical patent/WO2011087948A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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
    • E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D21/0053—Anchoring-bolts in the form of lost drilling rods

Definitions

  • This invention relates to a self-drilling rock bolt having an expandable tube.
  • Rock anchors are used in underground mines, such as coal mines, to support the roof and ribs.
  • Installation of a conventional rock bolt involves drilling a borehole into the rock to a desired depth using an elongated drilling tool (termed a drill steel), removing the drill steel from the borehole, optionally inserting adhesive resin cartridges, and retaining the cartridges in the blind end of the borehole while a bolt, optionally bearing an expansion anchor, is installed into the borehole.
  • the free end of the bolt extending out of the borehole is received by a chuck of a bolting machine. The bolting machine rotates the bolt within the borehole to mix the adhesive resin and/or expand the expansion anchor.
  • Other bolts which are self-drilling, include a drill bit at a distal end of the bolt.
  • the bolt itself is used to drill the borehole as well as support the rock strata.
  • Such self-drilling bolts tend to be more costly than conventional bolting systems produced from rebar and resin cartridges.
  • self-drilling bolts may be desirable.
  • support installation can be a production bottleneck and self- drilling rock bolts may present advantageous time savings.
  • Self-drilling rock bolts provide higher productivity as bolts are installed more quickly, in that drilling and bolt installation are accomplished in one operation.
  • Self-drilling rock bolts are particularly effective in weak strata where there is a danger that rock surrounding drilled boreholes produced by a conventional drill steel can collapse before a conventional rock bolt is installed therein.
  • self-drilling rock bolts can increase the safety of bolting operators by avoiding handling of drill steel overhead prior to installation of a rock bolt and so avoid situations of unsupported rock strata.
  • the present invention includes a mine rock bolt having a longitudinally expandable tube.
  • the tube includes a longitudinally extending depression disposed between a pair of outer portions of the tube, as an exterior of the tube, defining a temporary, enclosed longitudinal passageway.
  • the mine roof bolt further includes a drill bit mounted at the distal end thereof.
  • the present invention also includes a mine rock bolt which includes an expandable tube which has, in an unexpanded configuration, a longitudinally extending passageway which is defined by an inwardly looped longitudinal section of a wall of the tube.
  • the mine rock bolt may have a drill end section which includes a drill bit and an opposing drive end section.
  • the drive end section may include a drive head for attaching a drill machine to the tube.
  • the drill end section When the tube is in the unexpanded configuration, the drill end section may be is used, when the bolt is in a drill mode, to drill a borehole in a rock face.
  • the tube expands, by input of a hydraulic fluid into an interior of the tube, the inwardly looped longitudinal section of the tube wall may be pushed outwardly by the fluid pressure to the point that the section no longer defines a passageway.
  • the tube may be placed in this expanded configuration, after the drill mode when the borehole is formed, so that the tube may radially expand into contact with the walls of the borehole.
  • the passageway may be longitudinally enclosed, but open at each end, to provide a conduit for a resin grout into a borehole or for removal of rock debris created when the bolt is in the drill mode.
  • a low pressure source may be applied to an open end of the passageway to aid in the removal of the rock debris.
  • the passageway is sealingly enclosed along a longitudinally extending junction point of two opposing curved outer sections of the wall which define a mouth to the passageway.
  • the rock bolt may include a sleeve which covers the tube to sealingly enclose the passageway.
  • the sleeve may be made of a thermoplastic material which liquefies under expansive pressure to seal the tube within the borehole.
  • Figure 1 is a side view of a rock bolt in an embodiment of the present invention
  • Figure 2 is a cross section taken along a line 2-2 of Figure 1 ;
  • Figure 3 is a cross section taken along a line 3-3 of Figure 4B, as installed in rock strata;
  • Figures 4A and 4B are side views of the rock bolt of Figure 1 as installed in rock strata, in an original and expanded state, respectively;
  • Figure 5 is a side view of the bolt of Figure 1 , partially installed in rock strata, illustrating schematically a drive chuck of a bolting machine engaged with the bolt;
  • Figures 6A and 6B are side views of another embodiment of the rock bolt of the present invention installed in rock strata in an original and expanded state, respectively;
  • Figures 7A and 7B are side views of another embodiment of the rock bolt of the present invention installed in rock strata in an original and expanded state, respectively;
  • Figure 8 is a side view, partly in section, of another embodiment of the rock bolt of the present invention;
  • Figure 9 is a cross section taken along a line 9-9 of Figure 8;
  • Figure 10 is an end view of the mine rock bolt of Figure 8;
  • Figure 1 1 is a cross section taken along a line 1 1 -1 1 of the mine rock bolt of Figure 8 as installed in a rock strata and then partially inflated;
  • Figure 12 is a perspective view of another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the rock bolt 10 includes an expandable elongate tube 12 having an initial cross-sectional profile as shown in Figure 2, i.e. before deformation from internal hydraulic pressure as described below.
  • the tube 12 is partially collapsed upon itself (such as by rolling or drawing) so as to provide a depressed region 14, between two curved outer portions 16, 18 extending longitudinally at least partially along the length of the tube 12.
  • the tube 12 is produced from a steel alloy or the like having sufficient strength to function in mine roof support, even after internal hydraulic pressure-induced deformation.
  • the outer portions 16, 18 of the tube 12 are joined to each other via a weld bead 20.
  • the weld bead 20 extends longitudinally between the longitudinally extending outer portions 16, 18 so as to seal a junction point at the base of the depressed region 14 which may provide an opening into a main passageway 32 which is described below.
  • a first stiffening tube 22 is attached to and surrounds a drive end portion 24 of the tube 12 and includes a drive head 26 at a drive end 25.
  • the drive head 26 is configured for engagement with a socket of a bolting machine (not shown) and may be four-sided.
  • a lip 18 extends from the stiffening tube 22 for engaging with a rock surface as described below.
  • a second stiffening tube 28 is attached to and surrounds a drill end portion 30 of the tube 12.
  • the tube 28 carries, at a drill end 40, a drill bit 41.
  • the tube defines the main passageway 32 and a pair of interior passageways 34, 36 (see Figure 2).
  • the main passageway 32 is open-ended at drill end 40 and at the drive end 25.
  • the interior passageways 34 and 36 terminate within a drill end portion 30 of the tube by including, within these passageways, a filler material 38 (see Figure 10).
  • the interior passageways are terminally closed, by a suitable means, within the drive end portion 24.
  • the first stiffening tube 22 includes an opening 42 which is in register with an opening 44 in the wall of the tube 12, such that the openings 42, 44 are in fluid communication with the interior passageways 34 and 36.
  • the bolt 10 is inserted through a bearing plate 46 and the drive head 26 is installed in a drive chuck of a drilling machine (shown schematically in Figure 5) and rotated, such that the bolt 10 bores rock by action of the drill bit 41 to produce a borehole 58.
  • a drilling machine shown schematically in Figure 5
  • debris produced during drilling can be removed from the borehole via the main passageway 32 aided by the application of low pressure or suction to the drive end 25, such as via the drive chuck (hereinafter referred to as the vacuum system).
  • the vacuum system is advantageous over prior art methods of debris removal, such as those methods that involve flushing the borehole with water, in that such systems generally have higher maintenance requirements and, when drilling in relatively weak rock, water has the effect of further weakening such rock and it puddles on the floor producing mud.
  • the main passageway 32 can be used to deliver, into the borehole, a settable resin (not shown) which will flow from the drill end 40 between the walls of the borehole and the outer wall of the tube 12 to set and fix the tube within the borehole once the tube is hydraulically inflated.
  • a thermoplastic resin can be applied, e.g. during manufacture, to coat the outer surface of the tube 12. The resin will liquefy when placed under compression, which will happen on inflation of the tube into contact with the walls of the borehole, and then set, forming a seal between the outer surface of the tube and the borehole. This seal will enhance the vacuum effect created in the main passageway for debris removal.
  • the tube 12 can radially expand to an extent that it deforms into the surrounding rock by increasing the borehole diameter, increasing the pull-out resistance of the bolt from the borehole.
  • sleeves 60, 62 can be included on the rock bolt 10 as shown in Figures 6A, 6B and Figures 7A, 7B.
  • Bolts 10A and 10B shown in Figures 6 and 7 respectively are identical to the bolt 10 except for the inclusion of these sleeves.
  • the sleeves 60, 62 prevent tube 12 from radially expanding in the region over which the sleeves are engaged thereby creating bulges 64 at points of contact of the tube with a sleeve (see Figures 6B and 7B).
  • the bulges 64 provide additional points of frictional engagement with the borehole, thereby increasing the overall strength of the hold the bolt 10A or 10B has on the borehole walls.
  • the mine rock bolt 10C includes a sleeve 66, which can be made from a variety of materials such as a plastic material (for example "heat shrink"), foil or the like, surrounding the tube 12.
  • the sleeve is, in this particular embodiment, functionally equivalent to the weld bead 20 of the earlier embodiment; it seals the main passageway 32 for passage of debris therethrough during drilling.
  • the bolt 10C is installed as described above regarding the bolt 10.
  • the sleeve 66 can also include nodules or the like (not shown) to increase the effect of a mechanical key between the sleeve 66 and the borehole 58.
  • the sleeve 66 is produced from a thermoplastic material. Upon inflation of the tube 12, the thermoplastic material heats up and the sleeve 66 plasticizes, flowing between the outside of tube 12 and the walls of the borehole 58. Thereafter, the thermoplastic material cools and interlocks the tube 12 and the borehole walls enhancing the pull-out resistance of the rock bolt 10C. Also, the thermoplastic sleeve also provides a seal there-between enhancing the vacuum effect in the main passageway 32 to collect drill debris. [0035] A further embodiment of the present invention is shown in Figure 12. The bolt 10D includes the tube 12. A coupling 68 can be swaged to an upper end of the tube or attached by other conventional means. A drill bit 41 is attached to the
  • the end fitting 72 is sized and configured for fitting into a socket of a bolting machine and may be six-sided (as shown) or four-sided, for example.
  • An extension member 76 extends from an opposite end of the end fitting 72 and can be fixed thereto or integrally formed therewith.
  • the opening 32 is formed in the extension member 76 to be in fluid communication with the interior passageways 34 and 36 of tube 12.
  • the underside of the end fitting 72 includes a vacuum port (not shown). Alternatively the vacuum port can be formed in an exposed end of the extension member 76. The port is used to connect a suction means or low pressure source for withdrawing debris during drilling.
  • the bolt 10D is installed and used as described above for the bolt 10 by inserting the end fitting 72 into a drive chuck, drilling a borehole in rock, applying a low pressure source to the vacuum port followed by delivering water into the opening 32 to expand the tube 12 against the walls of the borehole 58.

Abstract

L'invention porte sur un boulon de roche de mine qui comprend un tube expansible comportant un creux s'étendant longitudinalement disposé entre une paire de parties externes du tube, constituant un extérieur du tube, définissant un passage longitudinal fermé temporaire.
PCT/US2011/020309 2010-01-14 2011-01-06 Boulon expansible taraudeur WO2011087948A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29251310P 2010-01-14 2010-01-14
US61/292,513 2010-01-14

Publications (1)

Publication Number Publication Date
WO2011087948A1 true WO2011087948A1 (fr) 2011-07-21

Family

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Family Applications (1)

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PCT/US2011/020309 WO2011087948A1 (fr) 2010-01-14 2011-01-06 Boulon expansible taraudeur

Country Status (1)

Country Link
WO (1) WO2011087948A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013173901A1 (fr) * 2012-05-22 2013-11-28 Atlas Copco Canada Inc. Boulon d'ancrage et procédé d'installation d'un boulon d'ancrage
WO2015072828A1 (fr) * 2013-11-15 2015-05-21 Aguilar Vera Oscar Octavio Ancrage minier à filet sur la pointe
EP2929145A4 (fr) * 2012-12-04 2016-08-03 Fci Holdings Delaware Inc Boulon extensible comprenant élément de poussée
WO2016123668A1 (fr) * 2015-02-04 2016-08-11 Fero Group Pty Ltd Trépan de forage amélioré destiné à être utilisé avec un boulon de frottement
RU175908U1 (ru) * 2017-09-13 2017-12-22 Сергей Николаевич Цаплин Анкер фрикционного типа
WO2018013528A3 (fr) * 2016-07-12 2018-07-26 Fci Holdings Delaware, Inc. Boulon déformable résistant à la corrosion
EP3320179A4 (fr) * 2015-07-10 2019-03-13 Epiroc Canada Inc. Renfort de cisaillement et de traction pour boulon gonflable
WO2019135892A1 (fr) * 2018-01-05 2019-07-11 Nevada Industrial LLC Système de gonflage et de drainage d'ancrage de roche
RU215612U1 (ru) * 2022-07-18 2022-12-20 Виталий Юрьевич Лузин Фрикционный гидрораспорный трубчатый анкер

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US734373A (en) * 1902-10-22 1903-07-21 Jesse L Smith Ground-anchor.
US3324663A (en) * 1963-10-21 1967-06-13 American Cyanamid Co Rock bolting
US3597425A (en) * 1969-04-14 1971-08-03 American Standard Inc Plastic molding process
US3613495A (en) * 1969-08-06 1971-10-19 Henry J Podgursky Fastener means including an interior expansible core
US4423986A (en) * 1980-09-08 1984-01-03 Atlas Copco Aktiebolag Method and installation apparatus for rock bolting
US4459067A (en) * 1979-03-09 1984-07-10 Atlas Copco Aktiebolag Method of rock bolting and tube-formed expansion bolt
US4511289A (en) * 1981-10-19 1985-04-16 Atlas Copco Aktiebolag Method of rock bolting and rock bolt
US4601614A (en) * 1984-02-22 1986-07-22 Lane William L Rockbolt
US4990041A (en) * 1986-07-14 1991-02-05 Emanuel Winston Fastening device
US5993116A (en) * 1997-06-30 1999-11-30 Sandvik Rock Tools, Inc. Filler-containing rock bolt anchoring system and method of preparation thereof
WO2004016909A1 (fr) * 2002-08-19 2004-02-26 John Paul Mckelvey Boulon d'ancrage
US20060153645A1 (en) * 2004-12-20 2006-07-13 Dywidag-Systems International Pty Limited Rock bolt
US20070086867A1 (en) * 2005-10-13 2007-04-19 The Boeing Company Vacuum drilling system
US20070269274A1 (en) * 2003-06-03 2007-11-22 Ross Seedsman Rock Bolt

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US734373A (en) * 1902-10-22 1903-07-21 Jesse L Smith Ground-anchor.
US3324663A (en) * 1963-10-21 1967-06-13 American Cyanamid Co Rock bolting
US3597425A (en) * 1969-04-14 1971-08-03 American Standard Inc Plastic molding process
US3613495A (en) * 1969-08-06 1971-10-19 Henry J Podgursky Fastener means including an interior expansible core
US4459067A (en) * 1979-03-09 1984-07-10 Atlas Copco Aktiebolag Method of rock bolting and tube-formed expansion bolt
US4423986A (en) * 1980-09-08 1984-01-03 Atlas Copco Aktiebolag Method and installation apparatus for rock bolting
US4511289A (en) * 1981-10-19 1985-04-16 Atlas Copco Aktiebolag Method of rock bolting and rock bolt
US4601614A (en) * 1984-02-22 1986-07-22 Lane William L Rockbolt
US4990041A (en) * 1986-07-14 1991-02-05 Emanuel Winston Fastening device
US5993116A (en) * 1997-06-30 1999-11-30 Sandvik Rock Tools, Inc. Filler-containing rock bolt anchoring system and method of preparation thereof
WO2004016909A1 (fr) * 2002-08-19 2004-02-26 John Paul Mckelvey Boulon d'ancrage
US20070269274A1 (en) * 2003-06-03 2007-11-22 Ross Seedsman Rock Bolt
US20060153645A1 (en) * 2004-12-20 2006-07-13 Dywidag-Systems International Pty Limited Rock bolt
US20070086867A1 (en) * 2005-10-13 2007-04-19 The Boeing Company Vacuum drilling system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013173901A1 (fr) * 2012-05-22 2013-11-28 Atlas Copco Canada Inc. Boulon d'ancrage et procédé d'installation d'un boulon d'ancrage
EP2929145A4 (fr) * 2012-12-04 2016-08-03 Fci Holdings Delaware Inc Boulon extensible comprenant élément de poussée
WO2015072828A1 (fr) * 2013-11-15 2015-05-21 Aguilar Vera Oscar Octavio Ancrage minier à filet sur la pointe
WO2016123668A1 (fr) * 2015-02-04 2016-08-11 Fero Group Pty Ltd Trépan de forage amélioré destiné à être utilisé avec un boulon de frottement
EP3320179A4 (fr) * 2015-07-10 2019-03-13 Epiroc Canada Inc. Renfort de cisaillement et de traction pour boulon gonflable
WO2018013528A3 (fr) * 2016-07-12 2018-07-26 Fci Holdings Delaware, Inc. Boulon déformable résistant à la corrosion
US10941657B2 (en) 2016-07-12 2021-03-09 Fci Holdings Delaware, Inc. Corrosion resistant yieldable bolt
RU175908U1 (ru) * 2017-09-13 2017-12-22 Сергей Николаевич Цаплин Анкер фрикционного типа
WO2019135892A1 (fr) * 2018-01-05 2019-07-11 Nevada Industrial LLC Système de gonflage et de drainage d'ancrage de roche
RU215639U1 (ru) * 2022-07-02 2022-12-21 Виталий Юрьевич Лузин Фрикционный гидрораспорный трубчатый анкер
RU215612U1 (ru) * 2022-07-18 2022-12-20 Виталий Юрьевич Лузин Фрикционный гидрораспорный трубчатый анкер

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