WO2021056062A1 - Chariot de forage et d'ancrage - Google Patents

Chariot de forage et d'ancrage Download PDF

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Publication number
WO2021056062A1
WO2021056062A1 PCT/AU2020/051011 AU2020051011W WO2021056062A1 WO 2021056062 A1 WO2021056062 A1 WO 2021056062A1 AU 2020051011 W AU2020051011 W AU 2020051011W WO 2021056062 A1 WO2021056062 A1 WO 2021056062A1
Authority
WO
WIPO (PCT)
Prior art keywords
dolly
rock bolt
drill rod
drilling
passage
Prior art date
Application number
PCT/AU2020/051011
Other languages
English (en)
Inventor
Alaster WYLIE
Original Assignee
Stellar Mining 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 AU2019903534A external-priority patent/AU2019903534A0/en
Application filed by Stellar Mining Pty Ltd filed Critical Stellar Mining Pty Ltd
Publication of WO2021056062A1 publication Critical patent/WO2021056062A1/fr

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
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/008—Anchoring or tensioning 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
    • E21D21/0093—Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation

Definitions

  • the present invention relates to mining equipment and, more particularly although not exclusively, to equipment for installing rock bolts in strata.
  • the drill motor is aligned to the correct position at which the rock bolt is to be installed.
  • the hole is drilled using a drill rod provided with a cutting tip at its outer end.
  • the lower end of the drill rod has an octagonal section which engages in the chuck of the drill motor.
  • the centre of the drill rod is hollow allowing water to flow through the centre for lubricating the cutting tip and removing the fines produced by the drilling of the hole.
  • the drill motor With the drill motor in the correct position, the drill rod is inserted into the chuck and thrust applied until the cutting tip reaches the strata. Once the cutting tip is at the face of the strata, water is injected into the drill rod and thrust applied sufficient to drill the hole while preventing the drill rod from bending or undergoing plastic deformation. When the hole has reached the required depth, water is left running through the drill rod for a sufficient time to flush the fines from the hole.
  • the drill motor is then retracted to its initial starting position and the drill rod removed from the chuck.
  • a driving socket or rock bolting “dolly” (according to the prior art as shown in figure 1) is now fitted to the drill motor chuck 201 of a rock bolt drilling machine as shown in figure 2A.
  • the rock bolting dolly has a recessed, typically octagonal socket at its outer end for engagement with the nut of a rock bolt.
  • the dolly has a long hollow section below the octagonal socket to enable the drill motor 202 to push a rock bolt through the bolting rig head plate (see figure 2) allowing the threaded section of the rock bolt to extend through the centre of the dolly when tensioning the rock bolt.
  • the drill motor 202 extends to head plate and provides rotation to drill rod.
  • a rock bolt (see figure 3), in this example, a chemical anchor rock bolt, is now inserted into the drilled hole and the drill motor and dolly extended to engage with the nut of the bolt.
  • the drill motor is now activated to rotate the bolt and thrust applied to drive the bolt fully into the hole.
  • This action causes the chemical resin anchor to be mixed around the annulus around the rock bolt.
  • the resin of the chemical anchor has a predefined spin time to allow the resin catalyst to mix and form a chemical bond.
  • the nut at the end of the rock bolt and which is seated in the socket of the dolly, has a shear pin preventing its rotation along the threaded section of the bolt until the bond is sufficiently formed between the rock bolt, the chemical anchor and the strata.
  • a drilling and bolting dolly driving a drill rod in a first phase of a rock bolting operation and driving a nut of a rock bolt in a second phase of the rock bolting operation.
  • the dolly is adapted for engagement with a chuck of a rock bolt drilling machine.
  • the dolly comprises a chuck of a rock bolt drilling machine.
  • a portion of the length of the dolly is provided proximate a lower end with an integral nut for engagement with the chuck of the rock bolt drilling machine.
  • a portion of the length of the dolly is provided at an upper end with a socket for engagement with either a drive portion of a drill rod or with a nut of a rock bolt.
  • a passage extends from below the socket; the passage accommodating a tail of a drill rod or a threaded section of a rock bolt extending from below the nut of the rock bolt.
  • a cylindrical chamber is located within the dolly below the passage; the cylindrical chamber further providing for any further length of threaded section of the rock bolt.
  • a water passage extends from a lower end of the dolly to the cylindrical chamber.
  • the cylindrical chamber is provided with a spring-loaded water flow control element; the control element comprising a stem depending from a disc; a water passage extending through the stem communicating with an opening in the disc; the spring acting between a lower surface of the cylindrical chamber and an underside of the disc.
  • a lower end of the tail of a drill rod is seated against an upper surface of the disc when a drill rod is inserted into the dolly; the water passage extending from the lower end of the dolly, the water passage through the stem of the water flow control element and a water passage of the drill rod then forming a continuous water passage of substantially equal diameter.
  • the spring of the spring-loaded water flow control element allows the disc to be depressed downwardly in the cylindrical chamber by the threaded end of a rock bolt according to any further length of treaded section of the rock bolt intruding into the dolly.
  • a method of installing a rock bolt with a dolly adapted for engagement with a drill rod and with a rock bolt in successive operations of a rock bolt installation including the steps of: providing a dolly with an internal water passage, aligning a rock bolt drilling machine with a selected location for the rock bolt with the drilling machine in a retracted position, fitting a drilling rod to an upper end of the dolly, bringing a tip of the drilling rod to strata to be drilled, initiating water flow through the drilling machine, the dolly and the drilling rod, applying thrust and rotation to the drill rod and drilling a hole in the strata until reaching required depth of the hole.
  • the installation includes the further steps of; stopping rotation of the drilling machine and shutting off the water flow, returning the drilling machine to the retracted position and removing the drill rod from the dolly, fitting a rock bolt to the end of the dolly, a nut of the rock bolt seating in a socket of the dolly, driving the dolly to insert the rock bolt into the drilled hole, rotating the dolly and the rock bolt to activate an anchor of the rock bolt, continuing rotation of the nut of the rock bolt after the anchor has formed a bond with the strata to tension the rock bolt in the strata.
  • the dolly is adapted for engagement with a chuck of a rock bolt drilling machine.
  • the dolly comprises a chuck of a rock bolt drilling machine.
  • the dolly is provided with a spring-loaded water flow control element; a water passage through the spring-loaded water flow control element being of a diameter substantially equal to both a water passage in a lower portion of the dolly and a water passage through the drill rod; the spring loaded water flow control element preventing delay in water delivery to a drilling tip of the drill rod.
  • a spring of the spring- loaded water flow control element urges the control element into contact with a lower end of the drill rod.
  • the spring of the spring-loaded water flow control element provides for the control element to be depressed to a lower level within the dolly by intrusion of a threaded end of a rock bolt.
  • a drilling and bolting dolly providing engagement between a chuck of a rock bolt drilling machine and a drill rod in a first phase of a rock bolting operation and between the chuck and a rock bolt in a second phase of the rock bolting operation; the dolly including a socket at an upper end of the dolly sized to receive either an integral nut of a drill rod or a nut of a rock bolt.
  • the dolly includes a passage depending from below the socket; the passage sized to accept either the tail of a drill rod or a length of threaded end of a rock bolt extending from the nut.
  • a lubricating fluid passage extends from a lower end of the dolly to communicated with the passage below the socket; the lubricating fluid passage passing lubricating fluid to a lubricating fluid passage of a drill rod when the tail of the drill rod is located in the passage below the socket.
  • the dolly further includes an integral nut proximate the lower end of the dolly for engagement with the chuck of the drilling machine.
  • a dolly for driving a drill rod in a first phase of a rock bolting operation and a nut of a rock bolt in a second phase of a drilling operation; the dolly forming a chuck of a rock bolt drilling machine.
  • a portion of the length of the dolly is provided at an upper end with a socket for engagement with either a drive portion of a drill rod or with a nut of a rock bolt.
  • a passage extends from below the socket; the passage accommodating a tail of a drill rod or a threaded section of a rock bolt extending from below the nut of the rock bolt.
  • a cylindrical chamber is located within the dolly below the passage; the cylindrical chamber further providing for any further length of threaded section of the rock bolt.
  • a water passage extends from a lower end of the dolly to the cylindrical chamber.
  • a drilling and bolting dolly providing engagement between a chuck of a rock bolt drilling machine and a drill rod in a first phase of a rock bolting operation and between the chuck and a rock bolt in a second phase of the rock bolting operation.
  • a portion of the length of the dolly is provided proximate a lower end with an integral nut for engagement with the chuck of the rock bolt drilling machine.
  • a portion of the length of the dolly is provided at an upper end with a socket for engagement with either a drive portion of a drill rod or with a nut of a rock bolt.
  • a passage extends from below the socket; the passage accommodating a tail of a drill rod or a threaded section of a rock bolt extending from below the nut of the rock bolt.
  • a cylindrical chamber is located within the dolly below the hollow section; the cylindrical chamber further providing for any further threaded section of the rock bolt.
  • a water passage extends from a lower end of the dolly to the cylindrical chamber.
  • the cylindrical chamber is provided with a spring-loaded water flow control element; the control element comprising a stem depending from a disc; a water passage extending through the stem communicating with an opening in the disc; the spring acting between a lower surface of the cylindrical chamber and an underside of the disc.
  • a lower end of the tail of a drill rod is seated against an upper surface of the disc when a drill rod is inserted into the dolly; the water passage extending from the lower end of the dolly, the water passage through the stem of the water flow control element and a water passage of the drill rod then forming a continuous water passage of substantially equal diameter.
  • the spring of the spring-loaded water flow control element allows the disc to be depressed downwardly in the cylindrical chamber by the threaded end of a rock bolt according to any further treaded section of the rock bolt intruding into the dolly.
  • a method of installing a rock bolt with a dolly adapted for engagement with a drill rod and with a rock bolt in successive operations of a rock bolt installation including the steps of: providing a dolly with an internal water passage, in a first phase of the operation fitting a lower end of the dolly to a chuck of a rock bolt drilling machine with the chuck in a retracted position, aligning the rock bolt drilling machine with a selected location for the rock bolt, fitting a drilling rod to an upper end of the dolly, bringing a tip of the drilling rod to strata to be drilled, initiating water flow through the chuck, the dolly and the drilling rod, applying thrust and rotation to the chuck and drilling a hole in the strata until reaching required depth of the hole.
  • the installation includes the further steps of; stopping rotation of the chuck and shutting off the water flow, returning the chuck and dolly to the retracted position and removing the drill rod from the dolly, fitting a rock bolt to the end of the dolly, a nut of the rock bolt seating in a socket of the dolly, driving the chuck and dolly to insert the rock bolt into the drilled hole, rotating the chuck and dolly to rotated the rock bolt to activate an anchor of the rock bolt, continue rotation of the nut of the rock bolt after the anchor has formed a bond with the strata to tension the rock bolt in the strata.
  • the dolly is provided with a spring-loaded water flow control element; a water passage through the spring-loaded water flow control element being of a diameter substantially equal to both a water passage in a lower portion of the dolly and a water passage through the drill rod; the spring loaded water flow control element preventing delay in water delivery to a drilling tip of the drill rod.
  • a spring of the spring- loaded water flow control element urges the control element into contact with a lower end of the drill rod.
  • the spring of the spring-loaded water flow control element provides for the control element to be depressed to a lower level within the dolly by intrusion of a threaded end of a rock bolt.
  • a drilling and bolting dolly providing engagement between a chuck of a rock bolt drilling machine and a drill rod in a first phase of a rock bolting operation and between the chuck and a rock bolt in a second phase of the rock bolting operation; the dolly including an integral nut proximate a lower end of the dolly for engagement with the chuck of the drilling machine and a socket for engagement with a drill rod or a nut of a rock bolt at an upper end; the dolly further including a fluid conducting passage extending from the lower end of the dolly to communicate with a chamber below the socket.
  • Figure 1 is a driving element or dolly for the installation of a rock bolt into strata according to prior art
  • Figure 2A is a representation of a rock bolt drilling machine, motor and chuck for installing rock bolts for use with some preferred embodiments of the invention
  • Figure 2B is a representation of a rock bolt drilling machine in which the chuck is replaced with an embodiment of the dolly according to the invention
  • Figure 3 shows rock bolts prior to installation and after tensioning against strata
  • Figure 4 is a cross section of a dolly according to a preferred embodiment of the invention.
  • Figure 4A is an end view of the dolly of figure 4 showing cross sections of the dolly
  • Figure 4B is an end section of a drilling rod for drilling a rock bolt hole
  • Figure 5 is a cross section of the dolly of figure 4 when in use for drilling into strata
  • Figure 6 is a cross section of the dolly of figure 4 at the completion of tensioning a rock bolt against strata
  • Figure 7 is a cross section of a dolly according to a second preferred embodiment of the invention.
  • the dolly of the present invention eliminates the step of removing a dolly according to the prior art each time a rock bolt has been installed to allow the fitting of a drill rod into the drilling machine chuck for the next installation.
  • a drilling and bolting dolly 10 conforms in its external diameters to the prior art dolly of figure 1. Similar to that dolly, the lower end 12 of the dolly 10 is provided with an integral nut 14 for engagement with a socket of the chuck of a rock bolt drilling machine such as the one shown in figure 2. Again, similar to a dolly of the prior art, the upper end of the dolly 10 is provided with a socket 16 for engagement with an integral nut 18 formed at a lower end 20 of a drill rod 22 shown in figure 4B. Also, in common with dollys of the prior art, a passage 24 extends downwardly from the socket 16 to accommodate the tail 26 of the drill rod 22 as shown in figure 5.
  • the overall length of the dolly 10 is considerably shorter than dollys of the prior art. Since the dolly 10 is intended to remain in the chuck of the rock bolt drilling machine throughout a rock bolt installation process, drill rods for use with the dolly 10 are shorter than those which currently fit directly into a drilling machine chuck.
  • the dolly 10 is further provided with a cylindrical chamber 28 located below the passage 24.
  • a cylindrical chamber 28 located below the passage 24.
  • One function of this chamber 28, as shown in figure 6, is to provide for a section of the threaded end 30 of a rock bolt 32 as it extends from below the rock bolt nut 34 during tensioning of the bolt as will be described below.
  • the other function of the chamber 28 is to house a spring-loaded water flow control element 36.
  • Control element 36 comprises a stem 38 depending from a disc 40.
  • the disc 40 operates as a close sliding fit within the chamber 28, while the lower end of the stem 38 extends as a sliding fit into a water passage 42 which extends from the lower end 12 of the dolly to the chamber 28.
  • the spring 43 of the spring- loaded water flow control element 36 acts between the underside of the disc 40 and the bottom of the chamber 28.
  • a water or lubricating liquid passage 44 extends through the stem 38 and communicates with an opening 44 in the disc 40 at its upper end and with the water passage 44 at its lower end.
  • the disc 40 of the control element 36 is urged by the spring 43 to the top of chamber 28 and into contact with the end of the tail 26 of the drill rod 22.
  • the diameters of the water passages 42 and 44 are substantially equal to the water passage 46 which extends the length of the drill rod 22, forming a continuous water passage from the lower end of the dolly to the drilling tip of the drill rod.
  • the dolly of this embodiment is externally configured in the manner of the dolly of the first embodiment above and shown in figure 4.
  • the dolly 100 is provided with a socket 116 for engagement with either the end of a drilling rod or the nut of a rock bolt.
  • the dolly 100 is provided with a lubricating fluid passage 142 extending from the lower end of the dolly and communicating with a chamber 124 below the socket 116.
  • the relatively narrow water passage 142 extends all the way to the chamber 124 and is devoid of the valve arrangement of the first embodiment.
  • the chamber 124 is of the same diameter adapted to accept either the tail of a drill rod or the threaded end of a rock bolt, and is of sufficient depth to accommodate any length of thread projecting from the nut of a rock bolt at the completion of the rock bolt tensioning.
  • the dolly as described above forms a component of a drilling machine as shown in figure 2B. That is instead of a chuck into which a dolly of the first two embodiments above, may be inserted, the dolly replaces the chuck and the machine directly drives the dolly.
  • the device of the invention comprises a dolly/chuck of a rock bolt drilling machine.
  • the method of use of the dolly 10 (or 100) of the invention for the drilling of a rock bolt hole is as follows for the first two preferred embodiments above. With the chuck of the drilling machine in its retracted starting position, the lower end 12 of the dolly 10 is fitted to the chuck and the end 20 of a drill rod 22 fitted into the socket 16 and passage 24 at the upper end of the dolly. The drilling machine is aligned with the intended position for the rock bolt and the tip of the drill rod brought to the strata.
  • Flow of water or lubricating fluid is then initiated trough the chuck, and the passage 42 through the lower end of the dolly, the lubricating fluid flow control element 36 (in the case of the first preferred embodiment) and through the drill rod 22 and thrust and rotation applied to the chuck to drill the hole into the strata to the required depth.
  • a rock bolt 32 is now fitted to the end of the dolly 10 with the nut 34 of the rock bolt seated in the socket 16 of the dolly, and any length of thread 30 extending from the nut accommodated in the passage 24.
  • the drilling machine chuck and dolly are then advanced to insert the rock bolt into the drilled hole.
  • the chuck is rotated to rotate the dolly and thus the nut and the rock bolt together to activate the anchor of the rock bolt.
  • the ribs around the bolt mix the chemicals which harden to bond the bolt to the surrounding strata.
  • the process is similar in all respects except that in this instance it is the nut of the rock bolt which is fitted to the dolly/chuck of the drilling machine.

Landscapes

  • 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

Un chariot de forage et d'ancrage entraîne une tige de forage dans une première phase d'une opération d'ancrage de roche et entraîne un écrou d'un boulon d'ancrage dans une seconde phase de l'opération d'ancrage de roche. Dans un mode de réalisation préféré, le chariot est conçu pour venir en prise avec un mandrin d'une machine de forage à boulon d'ancrage. Dans un mode de réalisation préféré, le chariot comprend un mandrin d'une machine de forage à boulon d'ancrage. L'invention concerne un procédé permettant d'installer un boulon d'ancrage avec un chariot conçu pour venir en prise avec une tige de forage et avec un boulon d'ancrage dans les opérations successives d'une installation à boulon d'ancrage. Le procédé comprend les étapes consistant à : fournir un passage d'eau interne à un chariot ; aligner une machine de forage à boulon d'ancrage avec un emplacement sélectionné pour le boulon d'ancrage avec la machine de forage dans une position rétractée ; fixer une tige de forage à une extrémité supérieure du chariot ; amener une extrémité de la tige de forage jusqu'aux strates à forer ; déclencher un écoulement d'eau à travers la machine de forage, le chariot et la tige de forage ; et appliquer une poussée et une rotation à la tige de forage, puis forer un trou dans les strates jusqu'à atteindre la profondeur requise du trou.
PCT/AU2020/051011 2019-09-23 2020-09-23 Chariot de forage et d'ancrage WO2021056062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2019903534A AU2019903534A0 (en) 2019-09-23 Drilling and Bolting Dolly
AU2019903534 2019-09-23

Publications (1)

Publication Number Publication Date
WO2021056062A1 true WO2021056062A1 (fr) 2021-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2020/051011 WO2021056062A1 (fr) 2019-09-23 2020-09-23 Chariot de forage et d'ancrage

Country Status (1)

Country Link
WO (1) WO2021056062A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558976A (en) * 1984-02-06 1985-12-17 Begluitti John H Quick fix drill wrench
US4907660A (en) * 1988-03-21 1990-03-13 Arnol Staggs Interchangeable sectional mining drill and bolt driver system
WO2005085582A1 (fr) * 2004-03-10 2005-09-15 Sandvik Intellectual Property Ab Appareil de forage en un seul passage, utilisation d'un trepan monobloc, procede et boulon d'ancrage pour boulonnage des roches en un seul passage.
AU2007100686A4 (en) * 2007-07-25 2007-09-06 Sandvik Intellectual Property Ab Spanner
US8302708B1 (en) * 2009-05-12 2012-11-06 Dover Bmcs Acquisition Corporation Rotational drill wrenches and drilling apparatuses including the same
US20190099813A1 (en) * 2017-10-03 2019-04-04 Royal Hydraulics Service and Manufacturing Company, Inc. Integrated Drill Chuck

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558976A (en) * 1984-02-06 1985-12-17 Begluitti John H Quick fix drill wrench
US4907660A (en) * 1988-03-21 1990-03-13 Arnol Staggs Interchangeable sectional mining drill and bolt driver system
WO2005085582A1 (fr) * 2004-03-10 2005-09-15 Sandvik Intellectual Property Ab Appareil de forage en un seul passage, utilisation d'un trepan monobloc, procede et boulon d'ancrage pour boulonnage des roches en un seul passage.
AU2007100686A4 (en) * 2007-07-25 2007-09-06 Sandvik Intellectual Property Ab Spanner
US8302708B1 (en) * 2009-05-12 2012-11-06 Dover Bmcs Acquisition Corporation Rotational drill wrenches and drilling apparatuses including the same
US20190099813A1 (en) * 2017-10-03 2019-04-04 Royal Hydraulics Service and Manufacturing Company, Inc. Integrated Drill Chuck

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