WO2002075116A1 - Procede de stabilisation de roche et de masses de sol, et un boulon d'ancrage utilise pour mettre en oeuvre ce procede - Google Patents

Procede de stabilisation de roche et de masses de sol, et un boulon d'ancrage utilise pour mettre en oeuvre ce procede Download PDF

Info

Publication number
WO2002075116A1
WO2002075116A1 PCT/SE2002/000390 SE0200390W WO02075116A1 WO 2002075116 A1 WO2002075116 A1 WO 2002075116A1 SE 0200390 W SE0200390 W SE 0200390W WO 02075116 A1 WO02075116 A1 WO 02075116A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill rod
drill
rock bolt
drilling
drill bit
Prior art date
Application number
PCT/SE2002/000390
Other languages
English (en)
Inventor
Thomas Arvidsson
Federico Scolari
Original Assignee
Atlas Copco Rock Drills Ab
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 Atlas Copco Rock Drills Ab filed Critical Atlas Copco Rock Drills Ab
Publication of WO2002075116A1 publication Critical patent/WO2002075116A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally

Definitions

  • a method for stabilization of rock and soil masses, and a rock bolt for practicing the method is provided.
  • the present invention relates to a method for rock and soil stabilization through grouting, whereby a rock bolt is grouted in a drill hole.
  • the invention also refers to an extensible, drilling rock bolt with a drill bit for practicing the method.
  • the drill rod is built up from several steel rods that are interconnected through sleeve couplings, a drill bit, and an adapter by which rotational and hammering driving power from a drilling machine is transferred to the drill rod.
  • the elements may be coupled through threaded engagements.
  • the sleeve coupling has internal threads, and the rod is received therein with the rod end abutting an end stop, formed in the center of the sleeve. Similarly, the drill bit is threaded internally and attached to the leading end of the rod. Drill machine adapters are available with male threads or female threads for engagement with a sleeve coupling, or for direct engagement with a rod, respectively.
  • a rod may be used with a sleeve coupling that is formed integrally with the rod.
  • Such rods are formed in one piece with an internal or female thread formed in the adapter end of the rod, and an external or male thread formed in the drill bit end of the rod.
  • steps are involved such as external and internal formation of the threads, formation of a water passage axially through the rod, and the rods may externally be formed with a hexagon sectional profile over a major portion of the rod length. The several manufacturing steps result in a cost for production that foresees a repeated use of such drill rods.
  • a frequently used reinforcement method in mining, tunneling and ground surface applications comprises cement- or resin grouting, whereby a material is injected to fill the drill hole in order to solidify or to cure about a manually inserted reinforcement steel bar.
  • drilling steel bars have been developed to serve as a drill rod, carrying a drill bit that is left to be grouted in the drill hole together with the bar/ bars.
  • the drilling steel bars are externally threaded in order to establish an engagement with the injection material.
  • the external thread may be applied in a rolling step to extend the whole length of the bolt, and extension of the bolts may be accomplished manually by means of separate sleeve couplings, as previously mentioned.
  • the object of the present invention is to satisfy a demand for a higher level of automation and efficiency together with an improved economy in long hole drilling, and specifically with respect to extension drilling with drilling rock bolts for cement grouting in soil and rock reinforcement applications.
  • the invention suggests a rock bolt comprising a hollow shank, a major part thereof being externally threaded, a first end of the rod having a male thread and the other end a female thread.
  • the female thread preferably is provided as a sleeve coupling that is non-rotationally connected with the rod, an internal thread of the sleeve engaging the external thread of the rod.
  • the connection between rod and sleeve is non-rotationally fixed through a radial compression that is locally applied in a zone of the contact area.
  • the compression is dimensioned to generate a form-fit connection through deformation of the sleeve and the rod into a non-circular section, in the zone of compression.
  • a special feature in the method is that the female end of the rock bolt is oriented in the drilling direction.
  • an extensible, drilling rock bolt having a drill bit formed with a male thread, and dimensioned to be received in abutting contact with an end stop that is formed in the female threaded end of the bolt.
  • Fig. 1 is a partially sectioned view showing an externally threaded, hollow rod shank, and a separately shown sleeve coupling;
  • Fig. 2 is a partially sectioned view showing the sleeve coupling in threaded engagement with the rod;
  • Fig. 2a is a sectioned view showing the contact area along a line A- A of fig. 2;
  • Fig. 3 is a partially sectioned view showing the rod and sleeve coupling in mutual, non-rotational engagement
  • Fig. 3a is a sectioned view showing the non-rotationally fixed zone of contact along a line B-B of fig. 3, and
  • Fig. 4 is a partially sectioned view showing a rock bolt of the present invention being positioned according to the suggested method.
  • a hollow rod shank 1 externally formed with a thread, i.e. a male thread, for example applied in a rolling step.
  • the subject thread is a rope thread, applied over the total axial length of the rod.
  • a sleeve coupling 2 is internally formed with a corresponding female thread for attachment to the rod end, the rod end being inserted for about half the axial length of the sleeve coupling substantially as shown in figs. 2 and 2a.
  • the sleeve coupling is non-rotationally connected with the rod through a radial compression of a zone 3 of the area of contact between the rod and sleeve coupling, as shown in fig. 3.
  • Said compression is dimensioned to generate a form fit engagement, preferably such that the zone 3 is deformed to have a non-circular sectional profile as shown in fig. 3a (the sectional views of figs. 2a and 3a are diagrammatic, disregarding the fact that the sectional plane intersects the threads at a slanting angle).
  • the compressed zone 3 is dimensioned to extend axially within the area of contact between the rod 1 and the sleeve coupling 2.
  • the radial deformation is controlled within the contact area such that the sectional profiles of the rod and sleeve coupling are unaffected at the end 4 of the rod.
  • a second rod may be inserted in the sleeve coupling into abutting contact with the end 4 of the first rod that is connected to the sleeve coupling.
  • a pressure is applied preferably in radially op- posite directions for producing a sectional deformation zone as shown in fig. 3a, the compressed area being oval in shape.
  • the pressure may be applied from three or more directions, such as from four and in pairs mutually opposite directions, for producing a four-sided deformation of the rod and sleeve coupling.
  • a counter support with a rounded sectional profile may be inserted in the sleeve coupling and/ or in the opening of the rod in order to control and limit the extent of deformation, if proper.
  • an extensible rock bolt is provided, one end of the rock bolt being formed with a male thread and the other end being formed with a female thread, the rock bolt having an external structure that provides for fixation when grouted in cement or resin, e.g., and providing for a manufacture that leads to better economy in rock and soil stabilization applications, specifically when used as a rock bolt that is secured in the drill hole by grouting.
  • a drilling rock bolt for cement grouting is shown, suitable for practicing the method of the present invention.
  • a drill steel formed as a hollow shank 1 , externally threaded for at least a portion of the axial length, the leading end of the shank as seen in the drilling direction being formed with a female thread.
  • the shank 1 is connected to a coupling sleeve 2, which is internally threaded to receive the shank inserted therein to about half the axial length of the sleeve coupling.
  • the sleeve coupling 2 is non-rotationally connected with the shank 1 as previously described, an end face of the sleeve coupling facing the drilling direction.
  • a drill bit 5 formed with external threads is inserted from the end of the sleeve coupling 2 to be sup- ported in the female threaded end of the shank.
  • the drill bit 5 has a neck portion 6 with external threads, the neck portion projecting from an inner periphery of a shoulder 7 that runs radially inwards from the circumference 8 of the drill bit.
  • the shoulder 7 provides a support surface that bears against the end face of the sleeve coupling 2 when the drill bit is inserted therein.
  • the contacting surfaces may be planar or provided with any suitable mating shapes, adapted for stabilization of the drill bit and for transfer of shock loads applied from a drilling machine.
  • the drill bit 5 may be formed by casting as known in the art, and comprises cutting edges or buttons 9 that are annealed and integrally formed in the drill bit.
  • the shank 1 , the sleeve coupling 2 and the drill bit 5 together form a drilling rock bolt operating as an extensible drill rod, the whole of which is grouted in the drill hole for reinforcement of injection material, such as cement.
  • the rock bolt is axi- ally anchored by means of a nut 10 and an intermediate washer 1 1.
  • the invention as described provides a method and rock bolt by which reinforcement of soil and rock is made more efficient through a higher level of automation in extension drilling. Modifications from the embodiment shown herein are possible while maintaining the improved operation, and without departing from the suggested solution as defined by the accompanying claims.
  • One such modification may include, for example, that the excavating drill bit is indirectly carried in the female threaded end of the drill rod, e.g. by an interconnected element.
  • a distinguishing feature of the method is that the drilling rock bolt is oriented with a female thread facing the drilling direction, and driven in drilling operations via a drilling machine adapter (not shown) formed with a female threaded tail.
  • the structure results in a more stable attachment of a drill bit formed with a male thread and inserted for abutting contact with an end face of a sleeve coupling.
  • the structure allows for simple anchorage of an extensible, drilling rock bolt formed with a male thread in one end and a female thread in the leading end facing the drilling direction, and securing the rock bolt with a nut that bears against the rock side.

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)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un procédé permettant de renforcer la rocher et/ou le sol. Ce procédé consiste à forer un trou pour du ciment ou un matériau d'injection correspondant destinés à être injectés autour d'un boulon d'ancrage à injecter dans le trou. Selon l'invention, un boulon d'ancrage creux est doté, à une extrémité, d'un filetage mâle et, à l'autre extrémité, d'un filetage femelle. Un trépan, doté d'un filetage mâle, est inséré dans l'extrémité à filetage femelle du boulon d'ancrage. Le trou est foré, l'extrémité à filetage femelle du boulon d'ancrage étant tournée dans la direction de forage et le boulon d'ancrage étant ancré par une rainure reliée à l'extrémité mâle du boulon d'ancrage. Pour la mise en oeuvre de ce procédé, on utilise un boulon extensible destiné à la foration de roche et comprenant une tige creuse pourvue de filetages externes, une extrémité du boulon d'ancrage étant dotée d'un filetage mâle et l'autre extrémité d'un filetage femelle. L'extrémité à filetage femelle supporte un foret à filetage mâle.
PCT/SE2002/000390 2001-03-15 2002-03-06 Procede de stabilisation de roche et de masses de sol, et un boulon d'ancrage utilise pour mettre en oeuvre ce procede WO2002075116A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE01/00915-8 2001-03-15
SE0100915A SE0100915L (sv) 2001-03-15 2001-03-15 Förfarande vid förstärkning av berg och jordmassor samt bergbult för utövande av förfarandet

Publications (1)

Publication Number Publication Date
WO2002075116A1 true WO2002075116A1 (fr) 2002-09-26

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PCT/SE2002/000390 WO2002075116A1 (fr) 2001-03-15 2002-03-06 Procede de stabilisation de roche et de masses de sol, et un boulon d'ancrage utilise pour mettre en oeuvre ce procede

Country Status (2)

Country Link
SE (1) SE0100915L (fr)
WO (1) WO2002075116A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106700A1 (fr) * 2003-06-03 2004-12-09 Dunefire Pty Ltd Boulon d'ancrage
WO2007070905A2 (fr) * 2005-12-19 2007-06-28 Atlas Copco Mai Gmbh Echangeur de chaleur
WO2007095690A1 (fr) * 2006-02-24 2007-08-30 Commonwealth Scientific And Industrial Research Organisation Adaptateur pour boulon de stabilisation, ecrou d'injection de coulis, ecrou d'injection de coulis et boulon de stabilisation combines et procede pour les utiliser
AU2004243343B2 (en) * 2003-06-03 2008-08-28 Dunefire Pty Ltd Rockbolt
CN102505687A (zh) * 2011-12-13 2012-06-20 江苏建筑职业技术学院 可预爆钻注锚一体化锚杆及施工方法
US8282756B2 (en) 2004-12-23 2012-10-09 Messier-Bugatti Method of making a fiber preform for manufacturing parts of a composite material of the carbon/carbon type incorporating ceramic particles, and products obtained thereby
CN106194227A (zh) * 2016-08-08 2016-12-07 何满潮 沿空留巷控帮装置及沿空留巷控帮施工方法
CN111577357A (zh) * 2020-04-07 2020-08-25 山西海洁机电科技有限公司 钻锚一体中空锚杆及锚注方法
CN114934795A (zh) * 2022-06-17 2022-08-23 中国矿业大学 一种可自注锚固剂和施加预紧力的相似模型试验锚杆

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695045A (en) * 1970-02-03 1972-10-03 Chester I Williams Rock bolts
EP0247778A1 (fr) * 1986-05-19 1987-12-02 Baker Hughes Incorporated Boulon d'ancrage et dispositif et procédé pour son installation en une seule opération
DE4220636A1 (de) * 1992-06-24 1994-01-05 Ischebeck Friedrich Gmbh Verbindungselement
WO1996021087A1 (fr) * 1995-01-06 1996-07-11 H. Weidmann Ag Tige de boulon d'ancrage destinee a un boulon d'ancrage d'injection et de perçage
US5649789A (en) * 1993-03-16 1997-07-22 Cutincoal Pty Limited Integrated drilling and rock bolting apparatus
JPH11343800A (ja) * 1998-05-29 1999-12-14 Daiyonki Chishitsu Kenkyusho:Kk 自穿孔ロックボルトの施工方法およびそのアンカー体構造

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695045A (en) * 1970-02-03 1972-10-03 Chester I Williams Rock bolts
EP0247778A1 (fr) * 1986-05-19 1987-12-02 Baker Hughes Incorporated Boulon d'ancrage et dispositif et procédé pour son installation en une seule opération
DE4220636A1 (de) * 1992-06-24 1994-01-05 Ischebeck Friedrich Gmbh Verbindungselement
US5649789A (en) * 1993-03-16 1997-07-22 Cutincoal Pty Limited Integrated drilling and rock bolting apparatus
WO1996021087A1 (fr) * 1995-01-06 1996-07-11 H. Weidmann Ag Tige de boulon d'ancrage destinee a un boulon d'ancrage d'injection et de perçage
JPH11343800A (ja) * 1998-05-29 1999-12-14 Daiyonki Chishitsu Kenkyusho:Kk 自穿孔ロックボルトの施工方法およびそのアンカー体構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004243343B2 (en) * 2003-06-03 2008-08-28 Dunefire Pty Ltd Rockbolt
AU2004243343C1 (en) * 2003-06-03 2009-03-19 Dunefire Pty Ltd Rockbolt
WO2004106700A1 (fr) * 2003-06-03 2004-12-09 Dunefire Pty Ltd Boulon d'ancrage
US8282756B2 (en) 2004-12-23 2012-10-09 Messier-Bugatti Method of making a fiber preform for manufacturing parts of a composite material of the carbon/carbon type incorporating ceramic particles, and products obtained thereby
WO2007070905A2 (fr) * 2005-12-19 2007-06-28 Atlas Copco Mai Gmbh Echangeur de chaleur
WO2007070905A3 (fr) * 2005-12-19 2007-10-04 Atlas Copco Mai Gmbh Echangeur de chaleur
WO2007095690A1 (fr) * 2006-02-24 2007-08-30 Commonwealth Scientific And Industrial Research Organisation Adaptateur pour boulon de stabilisation, ecrou d'injection de coulis, ecrou d'injection de coulis et boulon de stabilisation combines et procede pour les utiliser
CN102505687A (zh) * 2011-12-13 2012-06-20 江苏建筑职业技术学院 可预爆钻注锚一体化锚杆及施工方法
CN102505687B (zh) * 2011-12-13 2014-08-06 江苏建筑职业技术学院 可预爆钻注锚一体化锚杆及施工方法
CN106194227A (zh) * 2016-08-08 2016-12-07 何满潮 沿空留巷控帮装置及沿空留巷控帮施工方法
CN111577357A (zh) * 2020-04-07 2020-08-25 山西海洁机电科技有限公司 钻锚一体中空锚杆及锚注方法
CN114934795A (zh) * 2022-06-17 2022-08-23 中国矿业大学 一种可自注锚固剂和施加预紧力的相似模型试验锚杆
CN114934795B (zh) * 2022-06-17 2023-12-12 中国矿业大学 一种可自注锚固剂和施加预紧力的相似模型试验锚杆

Also Published As

Publication number Publication date
SE0100915D0 (sv) 2001-03-15
SE0100915L (sv) 2002-09-16

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