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WO2016161480A1 - Ensemble forage amélioré comprenant un boulon à friction - Google Patents

Ensemble forage amélioré comprenant un boulon à friction Download PDF

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Publication number
WO2016161480A1
WO2016161480A1 PCT/AU2016/050257 AU2016050257W WO2016161480A1 WO 2016161480 A1 WO2016161480 A1 WO 2016161480A1 AU 2016050257 W AU2016050257 W AU 2016050257W WO 2016161480 A1 WO2016161480 A1 WO 2016161480A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling assembly
drill string
assembly according
friction bolt
drill
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.)
Ceased
Application number
PCT/AU2016/050257
Other languages
English (en)
Inventor
Matthew Mclaren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fero Group Pty Ltd
Original Assignee
Fero Group Pty Ltd
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
Priority claimed from AU2015901278A external-priority patent/AU2015901278A0/en
Application filed by Fero Group Pty Ltd filed Critical Fero Group Pty Ltd
Priority to CA2982186A priority Critical patent/CA2982186A1/fr
Priority to AU2016245331A priority patent/AU2016245331B2/en
Priority to EP16775962.0A priority patent/EP3283730A4/fr
Priority to US15/565,098 priority patent/US20180112529A1/en
Publication of WO2016161480A1 publication Critical patent/WO2016161480A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • 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
    • E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing means
    • 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

Definitions

  • the present invention relates to drilling tools and assemblies for installing friction bolts and more particularly drill bits for drill tools and assemblies for installing friction bolts.
  • the present invention also relates to friction bolts and methods of drilling involving friction bolts.
  • Friction bolts are used to stabilise rooves and walls during underground mining and most often have a generally cylindrical body and a collar at the trailing end of the body.
  • Friction bolts are designed so that when they are driven into a slightly undersized hole in a formation, such as a rock strata, they resiliently deform. This resilient deformation exerts radial and frictional forces against the wall of the hole to retain the friction bolt within the hole and to reinforce the rock strata.
  • Friction bolts can be installed in a two step process where the first step involves drilling a hole with one drill tool and the second step involves inserting the friction bolt with another tool. This two step process, whilst allowing for the recovery of the entire drill string used to drill the hole, is time consuming and otherwise inefficient.
  • the present invention seeks to provide an alternative that at least partially addresses one or more of the problems with existing one step friction bolt systems. Summary of the Invention
  • the present invention provides a drilling assembly for simultaneously drilling a hole and inserting a friction bolt, the drilling assembly comprising a drill string, a drill bit and a friction bolt, wherein:
  • the drill string defines a leading end adapted to releasably operatively connect to the drill bit and a trailing end adapted to operatively engage with a means for imparting energy on said drill string;
  • the drilling assembly further comprises an elongate spacer that defines a leading end and a trailing end and is located between said friction bolt and said means for imparting energy on said drill string.
  • the present invention provides a means for imparting energy on a drill string for simultaneously drilling a hole and inserting a friction bolt, said means comprising:
  • an elongate spacer mounted on said drill string; wherein said elongate spacer defines a leading end and a trailing end and is adapted to transfer energy from said means for imparting energy on said drill string towards said leading end.
  • the present invention provides a method for simultaneously drilling a hole and installing a friction bolt into a body requiring reinforcement, the method comprising the steps of:
  • the present invention provides a two part drill bit assembly comprising:
  • a first annular drill bit defining a leading end, a trailing end and an inner surface and comprising a first cutting part disposed at the leading end;
  • a second drill bit defining a leading end, a trailing end and an outer surface and comprising a second cutting part disposed at its leading end; wherein the first annular drill bit is adapted to be releasibly received on the second drill bit via said inner surface of the first drill bit and said outer surface of the second drill bit.
  • Figure 1 A is an exploded perspective view of a drilling assembly according to one embodiment of a first aspect of the present invention including a two part drill bit;
  • Figure 1 B is a perspective side view of the drilling assembly in Figure 1A in a ready to drill configuration
  • Figure 1 C is a cross sectional side view of the drilling assembly in Figures 1 A and 1 B partway through the process of installing a friction bolt;
  • Figure 1 D is the same view as Figure 1 C but shows the friction bolt fully installed
  • Figure 2A is a perspective view of an example of the elongate spacer that forms part of the embodiment in Figures 1 A-1 D;
  • Figure 2B is cross sectional side view of the elongate spacer in Figure 2A;
  • Figure 3A is a perspective view of an example of the coupling that that forms part of the embodiment in Figures 1 A-1 D;
  • Figure 3B is a perspective view of the coupling in Figure 3A from the opposite end;
  • Figure 3C is cross sectional side view of the coupling in Figures 3A and 3B;
  • Figures 4A to 4C are perspective views of an example of a two part drill bit according to a fourth aspect of the present invention that forms part of the embodiment in Figures 1A-1 D, where Figure 4A depicts, the sacrificial part of the bit, Figure 4B the other part of the bit that is reusable and Figure 4C the two parts assembled together.
  • a drilling assembly for simultaneously drilling a hole and inserting a friction bolt, the drilling assembly comprising a drill string, a drill bit and a friction bolt, wherein:
  • the drill string defines a leading end adapted to releasably operatively connect to the drill bit and a trailing end adapted to operatively engage with a means for imparting energy on said drill string;
  • the drilling assembly further comprises an elongate spacer that defines a leading end and a trailing end and is located between said friction bolt and said means for imparting energy on said drill string.
  • the present invention is based on the discovery and/or recognition of two problems associated with one step or single pass drilling assemblies and their use.
  • the elongate spacer at least partially surrounds a part of the drill string.
  • the part of the drill string is the trailing part of the drill string.
  • the part of the drill string is the part of the drill string adjacent to the means for imparting energy on said drilling string,
  • the leading end of the elongate spacer is adapted to contact the trailing end of the friction bolt and transfer energy from the means for imparting energy on said drill string to the friction bolt.
  • the energy transferred from the means for imparting energy on said drill string to the friction bolt is impact energy.
  • the elongate spacer is adapted not to transfer at least some of the rotational energy from the means for imparting energy on said drill string to the friction bolt.
  • the elongate spacer is generally cylindrical.
  • the elongate spacer comprises a longitudinal axial passage or bore adapted to receive the drill string therethrough.
  • the longitudinal axial passage or bore defines a substantially smooth inner surface.
  • the longitudinal axial passage or bore has a uniform cross sectional shape and size.
  • the longitudinal axial passage or bore is sized to enable the drill string to rotate therein without unduly impacting the elongate spacer.
  • the elongate spacer is at least 50, 100, 150, 200, 300, 400, 500, 750 or 1000mm long.
  • the drilling assembly may further comprise at least one washer member located between the elongate spacer and the means for imparting energy on said drill string.
  • the washer member at least partially surrounds a part of the drill string.
  • the washer member at least partially surrounds a trailing part of the drill string.
  • the washer member at least partially surrounds the part of the drill string adjacent to the means for imparting energy on said drilling string.
  • the leading end of the washer member is adapted to contact the trailing end of the elongate spacer and transfer energy from the means for imparting energy on said drill string to the elongate spacer.
  • the energy transferred from the means for imparting energy on said drill string to the elongate spacer is impact energy.
  • the washer member is adapted not to transfer at least some of the rotational energy from the means for imparting energy on said drill string to the elongate spacer.
  • the washer member is a split washer.
  • the washer member is an annular ring.
  • the washer member comprises an annulus adapted to receive the drill string therethrough.
  • the washer member is sized to enable the drill string to rotate therein without unduly impacting the washer member.
  • the washer member is at least 10, 20 or 30mm long.
  • the at least one washer member comprises two washer members.
  • the at least one washer member is lubricated.
  • the drilling assembly may further comprise a coupling member adapted to operatively connect the means for imparting energy on said drill string with the drill string.
  • the coupling member is adapted to releasably couple the means for imparting energy on said drill string with the drill string.
  • the coupling member is generally cylindrical and defines first and second threads.
  • the first and second threads are located at opposed ends of the coupling member
  • the first and second threads have different widths.
  • the coupling member is a reducer.
  • the first thread on the coupling member is adapted to engage with a suitably threaded portion on the trailing end of the drill string and the second thread of the coupling member is adapted to engage with a suitably threaded portion on the means for imparting energy.
  • the drill bit is disposable.
  • the drill bit comprises a plurality of parts.
  • the drill bit comprises two parts it is preferred that one part is disposable and the other part is reusable.
  • the disposable drill bit or drill bit part is adapted to be detached from the drill string or other part of the drill bit prior to retraction of the drill string from the hole at the end of the drilling process.
  • the drill bit is adapted to be releasibly engaged with the end of the friction bolt.
  • the drill bit may comprise a means for engaging with end of friction bolt.
  • the means for engaging with end of friction bolt is a circumferential groove on the drill bit that provides for a friction fit between the friction bolt and the drill bit.
  • the friction bolt is a generally cylindrical structure adapted to be inserted into a rock or other formation to provide reinforcement.
  • the friction bolt is adapted to exert outward pressure on the hole into which it has been inserted.
  • the friction bolt has a configuration when inserted into a formation or in situ ("stressed configuration") where the width or diameter of the longitudinal axial passage therein is reduced relative to the width or diameter of the longitudinal axial passage prior to insertion of the friction bolt ("relaxed configuration").
  • the friction bolt defines a longitudinal axial passage.
  • the friction bolt comprises a longitudinal split along at least a portion of its length and whereby radial expansion of the tube is facilitated by lateral expansion of the longitudinal split.
  • the longitudinal split extends the full length of the friction bolt.
  • the friction bolt may comprise a fold or overlap extending along at least a portion of its length that enables the friction bolt to exert outward pressure on the hole into which it is inserted.
  • the fold or overlap is adapted to function as a spring that when constrained in the drill hole exerts outward pressure on the hole.
  • a means for imparting energy on a drill string for simultaneously drilling a hole and inserting a friction bolt comprising:
  • an elongate spacer mounted on said drill string; wherein said elongate spacer defines a leading end and a trailing end and is adapted to transfer energy from said means for imparting energy on said drill string towards said leading end.
  • the means for imparting energy on a drill string is a drilling machine such as a jumbo.
  • a method for simultaneously drilling a hole and installing a friction bolt into a body requiring reinforcement comprising the steps of: (i) providing a drill string including the friction bolt, a drill bit and an elongate spacer located at the trailing end of the friction bolt; and
  • the method further comprises the step of not applying rotational energy to the elongate spacer and/or the friction bolt.
  • the method further comprises the step of not rotating the elongate spacer and/or the friction bolt.
  • the method further comprises the step of detaching at least part of the drill bit prior to retracting the drill string from the hole.
  • a two part drill bit assembly comprising:
  • a first annular drill bit defining a leading end, a trailing end and an inner surface and comprising a first cutting part disposed at the leading end;
  • a second drill bit defining a leading end, a trailing end and an outer surface and comprising a second cutting part disposed at its leading end; wherein the first annular drill bit is adapted to be releasibly received on the second drill bit via said inner surface of the first drill bit and said outer surface of the second drill bit.
  • the inner surface of the first annular drill bit defines a plurality of recessed portions and the outer surface of the second drill bit defines a plurality of raised portions that are compatibly shaped.
  • the second drill bit further comprises a shank member at its following end adapted to operably engage with a drill string.
  • the first annular drill bit comprises a drill bit according to Figure 4A.
  • the second drill bit comprises a drill bit according to Figure 4B.
  • the two part drill bit comprises a drill bit according to Figure 4C.
  • the invention described herein may include one or more range of values (e.g. size etc).
  • a range of values will be understood to include all values within the range, including the values defining the range, and values adjacent to the range which lead to the same or substantially the same outcome as the values immediately adjacent to that value which defines the boundary to the range.
  • leading and following for example in the phrases “leading end” and “following end” refer to positions relative to the drilling process.
  • Leading refers to a feature or part thereof that is closest or proximal to the drilling interface whereas “following” refers to a feature or part thereof that is furthest or distal to the drilling interface.
  • the term "friction bolt” is interpreted to cover any apparatus adapted to be inserted into a rock or other formation to provide reinforcement by exerting outward pressure on the hole into which it has been inserted.
  • FIG. 1A-1 D One embodiment of a drilling assembly, for simultaneously drilling a hole and inserting a friction bolt, according to a first aspect of the present invention, is depicted in Figures 1A-1 D and generally indicated by the numeral 10.
  • the drilling assembly 10 comprises a friction bolt 12 that includes a longitudinal split and is supported on a drill string including a drill rod 14.
  • the drilling assembly also includes a plate 15 that is threaded over the friction bolt 12 and provides an increased surface area that facilitates the engagement of the flange 17 at trailing end of the friction bolt 12 with mesh (not shown) when the friction bolt 12 is fully installed.
  • the leading end of the drill rod 14 includes a threaded portion 16 that is adapted to engage with a two part drill bit assembly, according to an embodiment of a fourth aspect of the present invention and depicted separately in Figures 4A-4C, via a threaded bore in the shank portion 18 of a second drill bit in the form of reusable drill bit 20.
  • the other part of the two part drill bit assembly comprises a first annular drill bit in the form of sacrificial drill bit 22 that includes an inner surface shaped to releasibly engage with a suitably shaped outer surface on the leading end of the reusable drill bit 20.
  • the trailing end of the drill rod 14 includes another threaded portion 24 that is adapted to operatively engage with a means for imparting energy on said drill string via a coupling member in the form of a cylindrical threaded reducer coupling 26.
  • the reducer coupling includes a first thread 28 and a second thread 30 (best seen in Figure 3C).
  • the first thread 28 is wider and is adapted to engage with a compatible thread in the a means for imparting energy on said drill string such as a jumbo (not shown), the second thread 30 is adapted to engage with the threaded portion 24 on the trailing end of the drill rod 14.
  • an elongate spacer in the form of generally cylindrical spacer member 32 (depicted separately in Figures 2A and 2B) that defines a longitudinal axial passage 34 (best seen in Figure 2B).
  • the longitudinal axial passage 34 is sized to allow for the drill rod 14 to pass therethrough and rotate therein without unduly impacting the cylindrical spacer member.
  • a washer member in the form of ring washer 36.
  • the drill assembly 10 simultaneously drills a hole and installs a friction bolt 12 into a body 38 requiring reinforcement as follows.
  • a drill rod 14 is operatively connected to a drill rig (not shown) via cylindrical threaded reducer coupling 26.
  • the ring washer 36 and cylindrical spacer member 32 are then placed on to the drill rod 14 followed by friction bolt 12 and plate 15.
  • the two part drill bit 20, 22 is then attached to the leading end of the drill rod 14 to form the drill string in a ready to use configuration.
  • the operator then positions the leading end of the drill string in contact with the body 38 and commences the drilling process by imparting impact and rotational energy on the drill string.
  • the ring washer 36 and cylindrical spacer member 32 act to limit and preferably prevent rotational energy from the drill rig being transferred to the friction bolt 12 during installation.
  • the present invention has also been found to limit and preferably prevent undesirable breakage of drill rod 14 during the installation of the friction bolt 12.
  • cylindrical spacer member 32 preferably ensures that the coupling between the drill rod 14 and the drill rig is always spaced apart from the body 38 requiring reinforcement. This allows for increased flex of the drill string at all stages of the installation process.

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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)
  • Earth Drilling (AREA)

Abstract

La présente invention concerne un ensemble forage pour percer simultanément un trou et insérer un boulon à friction, l'ensemble forage comprenant un train de tiges de forage, un trépan et un boulon à friction, caractérisé par les éléments suivants : (i) le train de tiges de forage définit une extrémité avant conçue pour se raccorder de façon fonctionnelle et amovible à l'outil de forage et une extrémité arrière conçue pour entrer en contact de façon opérationnelle avec un moyen pour appliquer une énergie sur ledit train de tiges de forage ; (ii) le trépan est monté sur l'extrémité avant de ladite tige de forage; (iii) le boulon à friction entoure au moins partiellement ledit train de tiges de forage ; et (iv) l'ensemble forage comprend en outre une cale d'espacement allongée qui définit une extrémité avant et une extrémité arrière et est situé entre ledit boulon à frottement et ledit moyen pour appliquer une énergie sur ledit train de tiges de forage.
PCT/AU2016/050257 2015-04-10 2016-04-08 Ensemble forage amélioré comprenant un boulon à friction Ceased WO2016161480A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2982186A CA2982186A1 (fr) 2015-04-10 2016-04-08 Ensemble forage ameliore comprenant un boulon a friction
AU2016245331A AU2016245331B2 (en) 2015-04-10 2016-04-08 Improved drilling assembly comprising a friction bolt
EP16775962.0A EP3283730A4 (fr) 2015-04-10 2016-04-08 Ensemble forage amélioré comprenant un boulon à friction
US15/565,098 US20180112529A1 (en) 2015-04-10 2016-04-08 Improved Drilling Assembly Comprising a Friction Bolt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2015901278 2015-04-10
AU2015901278A AU2015901278A0 (en) 2015-04-10 Improved drilling assembly comprising a friction bolt

Publications (1)

Publication Number Publication Date
WO2016161480A1 true WO2016161480A1 (fr) 2016-10-13

Family

ID=57071656

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2016/050257 Ceased WO2016161480A1 (fr) 2015-04-10 2016-04-08 Ensemble forage amélioré comprenant un boulon à friction

Country Status (5)

Country Link
US (1) US20180112529A1 (fr)
EP (1) EP3283730A4 (fr)
AU (1) AU2016245331B2 (fr)
CA (1) CA2982186A1 (fr)
WO (1) WO2016161480A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019109700A1 (fr) * 2017-12-08 2019-06-13 中国矿业大学 Procédé de boulonnage d'ancrage pour améliorer une stabilité de toit à l'aide d'un toit et d'un côté renforcés de galerie de charbon

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2019262699B2 (en) 2018-05-03 2024-03-21 Epiroc Drilling Tools Ab Self-drilling hybrid rock anchor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648557B1 (en) * 1999-04-30 2003-11-18 Raers Corporation Pty Ltd. Drilling apparatus and method for single pass bolting
US20070274788A1 (en) * 2004-03-10 2007-11-29 Pierre Ravat Single Pass Drilling Apparatus, Use of a One-Piece Drill Bit, Method and Rock Bolt for Single Pass Rock Bolting
US20110131787A1 (en) * 2007-09-14 2011-06-09 Longyear Tm, Inc. Methods of assembling and installing self-drilling anchors
WO2012012401A2 (fr) * 2010-07-19 2012-01-26 Illinois Tool Works Inc. Dispositif d'ancrage
US20140154017A1 (en) * 2011-08-23 2014-06-05 Fci Holdings Delaware, Inc. Self-drilling friction bolt

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006317519B2 (en) * 2005-11-24 2012-11-29 Peter Andrew Gray Self drilling rock bolt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648557B1 (en) * 1999-04-30 2003-11-18 Raers Corporation Pty Ltd. Drilling apparatus and method for single pass bolting
US20070274788A1 (en) * 2004-03-10 2007-11-29 Pierre Ravat Single Pass Drilling Apparatus, Use of a One-Piece Drill Bit, Method and Rock Bolt for Single Pass Rock Bolting
US20110131787A1 (en) * 2007-09-14 2011-06-09 Longyear Tm, Inc. Methods of assembling and installing self-drilling anchors
WO2012012401A2 (fr) * 2010-07-19 2012-01-26 Illinois Tool Works Inc. Dispositif d'ancrage
US20140154017A1 (en) * 2011-08-23 2014-06-05 Fci Holdings Delaware, Inc. Self-drilling friction bolt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019109700A1 (fr) * 2017-12-08 2019-06-13 中国矿业大学 Procédé de boulonnage d'ancrage pour améliorer une stabilité de toit à l'aide d'un toit et d'un côté renforcés de galerie de charbon

Also Published As

Publication number Publication date
US20180112529A1 (en) 2018-04-26
CA2982186A1 (fr) 2016-10-13
EP3283730A1 (fr) 2018-02-21
AU2016245331A1 (en) 2017-11-02
EP3283730A4 (fr) 2018-11-21
AU2016245331B2 (en) 2021-05-20

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