EP1300546B1 - Ancrage de forage et d'injection - Google Patents

Ancrage de forage et d'injection Download PDF

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Publication number
EP1300546B1
EP1300546B1 EP02021000A EP02021000A EP1300546B1 EP 1300546 B1 EP1300546 B1 EP 1300546B1 EP 02021000 A EP02021000 A EP 02021000A EP 02021000 A EP02021000 A EP 02021000A EP 1300546 B1 EP1300546 B1 EP 1300546B1
Authority
EP
European Patent Office
Prior art keywords
injection
steel tube
drilling anchor
anchor according
threaded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02021000A
Other languages
German (de)
English (en)
Other versions
EP1300546A1 (fr
Inventor
Joachim Zotta
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.)
Perforator GmbH
Original Assignee
Perforator GmbH
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 Perforator GmbH filed Critical Perforator GmbH
Publication of EP1300546A1 publication Critical patent/EP1300546A1/fr
Application granted granted Critical
Publication of EP1300546B1 publication Critical patent/EP1300546B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
    • 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
    • E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

Definitions

  • Injection drilling anchors are used in various embodiments for connecting comparativelyen rock strata to keep open in particular in underground mining, but also in tunneling advanced distances and cavities.
  • WO 91/15657 discloses an injection drill anchor with an anchor tube which has a drill bit as well as rinsing and injection openings at the anchor tip facing the wellbore.
  • the anchor tube is provided with a borehole closure and at the projecting end of the well with a releasable connection element.
  • the invention has for its object to provide a Injetechnischsbohranker, which is simplified in structure and at the same time manufacturing technology as well as application technology improved.
  • the core of the invention is the concept of a Injetationsbohrankers, which serves both to create a borehole, for sealing the borehole, for introducing an injection medium into the mountains and as a supporting element of the mountain protection.
  • the injection drill anchor comprises at least one steel tube which comprises a smoothly cylindrical on the outer surface central longitudinal portion and at the ends of external threaded portions.
  • a first threaded portion is on the one hand coupled with a drill drive and on the other hand in exchange with the drill drive with an injection adapter for supplying an injection medium.
  • the second threaded portion located at the other end of the steel pipe is used for coupling with a rod end bearing a drill bit, outlet bores for the injection medium having rod end.
  • a transverse bore provided middle length section is a Blähschlauch fixed in position.
  • the first threaded portion is first coupled with a drill drive.
  • a drill drive Through the drill drive a borehole is made, at the same time a flushing fluid can be supplied via the drill drive.
  • the pressure of the flushing fluid must not be so great that the inflatable tube is activated.
  • the drill drive is removed from the first threaded portion. Subsequently, a pressure-deformable locking ball with a defined hardness are introduced into the longitudinal channel of the steel pipe and then the injection adapter is coupled to the first threaded portion.
  • the injection medium is introduced via the injection adapter in the steel tube, wherein the locking ball is displaced to the mouth of the locking bore in the rod head in the longitudinal channel.
  • the blocking ball seals the exit region of the longitudinal channel in the rod end.
  • the injection medium enters through the transverse bore in the wall of the steel pipe in the inflatable tube. This inflates and seals pressure-dependent and form-fitting against the wall of the borehole.
  • the injection adapter is removed from the first threaded section and used for further injections.
  • the invention drillable Injetationsbohranker with injection packer therefore makes it possible to carry out with simple means in a relatively short time a rock anchor - even in a gebrächen mountains - with optimal injection of injection fluids.
  • rod head is screwed with an internal thread having threaded sleeve on the second threaded portion.
  • the drill bit is set according to claim 3 with a threaded socket provided with an internal thread on a socket having an external thread of the rod end. Between the threaded sleeve and the neck of the rod head extend the outgoing from the interior outlet holes for the injection medium. These are preferably arranged starting from the interior slightly inclined towards the steel pipe.
  • the drill bit is provided with a longitudinal channel.
  • the injection medium can also pass into the borehole via this when the blocking ball has been pressed into the borehole via the longitudinal channel in the drill bit. Accordingly, the diameter in the longitudinal channel of the drill bit is designed in relation to the diameter of the blocking ball.
  • the costs incurred in the production of the wellbore cuttings can be properly removed circumferentially of the steel tube, according to the feature of claim 5 on the drill bit facing the end of the end position with press sleeves on the steel tube fixed in position inflatable tube attached in the direction of the drill bit to the outer surface of the steel tube conically tapered Abweiserhülse. A congestion in the transport of the cuttings is thereby avoided.
  • the wall thickness of the deflector sleeve preferably corresponds to the wall thickness of the press sleeves.
  • the mouths of the transverse bores in the outer surface of the steel pipe are covered according to claim 7 by a steel tube tightly enclosing elastic sleeve.
  • the elasticity of the sleeve is designed so that it yields only at a certain internal pressure in the longitudinal channel of the steel tube and the injection medium releases the way into the inflatable tube for pressing against the borehole wall.
  • the sleeve may for example be formed from a tube section.
  • the drill drive has - at least indirectly - according to the features of claim 9, a rotary feedthrough for a flushing fluid, such as water, and a pipe coupling connected to the rotary feedthrough.
  • the pipe coupling comprises in an annular coupling jacket two limited rotatable and against an elastic restoring force radially displaceable jaws with adapted to the first threaded portion inner thread segments and mounted in circumferential recesses detent balls.
  • diametrically opposite locking recesses are provided in a circumferential direction. The surfaces of these recesses extend from a radial shoulder first in the circumferential direction and then slightly increasing until they pass into the inner surface.
  • the locking balls are pressed by the curve of the recesses radially inward, so that they then roll along the inner surface of the clutch housing.
  • the clamping jaws engage around the first threaded section with the inner thread segments and turn the steel tube with the end-side drill bit as the drill drive continues to be activated.
  • the boring drive is stopped and the pipe coupling is turned back by 90 ° until the latching balls reach the latching recesses under the influence of the elastic restoring force and the thread segments detach from the first threaded section.
  • the drill drive is no longer in communication with the injection drill anchor. Subsequently, the rotary feedthrough can be removed with the pipe coupling of the first threaded portion.
  • a particularly advantageous embodiment of the invention is seen according to claim 10 in that the elastic restoring force is formed for the segmentally like, supported on the inner surface of the clutch casing sliding radially forcibly guided jaws arranged in addition to the thread segments helical compression springs.
  • the ends of the helical compression springs are preferably in pockets of the jaws.
  • a screw sleeve for connection to the first threaded portion having injection adapter in a series arrangement comprises a hose connection, a mixer and a check valve.
  • the hose connection is used for connection to an injection line.
  • a quick-snap closure is preferably provided.
  • the mixer serves to establish a proper consistency of the injection medium, while the check valve the backflow of the injection medium after Filling the gap between the borehole wall and the Injetechnischsbohranker prevented.
  • the injection drilling anchor 1 comprises (see also FIG. 3) a steel pipe 2 with a longitudinal channel 3.
  • the ends of the steel pipe 2 have external threaded sections 4, 5.
  • In this length section 6 are four mutually offset by 90 ° circumferentially offset and provided in pairs in diametrical arrangement in two parallel transverse planes Q1, Q2 transverse holes 7 in the wall 8 of the steel tube. 2 arranged.
  • the mouths of the transverse bores 7 in the outer surface 9 of the steel pipe 2 are connected by an elastic sleeve 10 tightly enclosing the steel pipe 2, e.g. in the form of a hose section, covered.
  • the axial position of the elastic sleeve 10 on the steel tube 2 is secured by two frontally of the sleeve 10 fixed to the steel tube 2 fixing rings 11.
  • the transverse bores 7, the sleeve 10 and the fixing rings 11 are covered by a Blähschlauch 12.
  • the inflatable tube 12 is fixed in position in the vicinity of its end faces 13 by press sleeves 14 on the steel tube 2.
  • a deflector sleeve 16 is tapered in the direction of the drill bit 15 down to the outer surface 9 of the steel tube 2.
  • the wall thickness of the deflector sleeve 16 corresponds approximately to the wall thickness of the press sleeves 14.
  • the drill bit 15 has a threaded sleeve 17 with an internal thread 18 with which it is fixed to a socket 20 of a rod end 21 which has an external thread 19 , which in turn is screwed with an internal thread 22 having threaded sleeve 23 on the second threaded portion 5 of the steel pipe 2.
  • the drill bit 15 is provided with a central longitudinal channel 24.
  • the injection drilling anchor 1 described above is connected for producing a borehole in the mountains with a rotary feedthrough 32 as part of a drill drive BA not shown in detail and with a pipe coupling 33 connected to the rotary feedthrough 32 (FIGS. 1 and 5 to 7).
  • the rotary union 32 comprises an annular housing 34 with a connection 35 for a flushing fluid SF, such as e.g. Water ( Figure 5). From a connected to the terminal 35 annular channel 41 in the housing 34 transverse bores go 36 to a central blind bore 37 in which can be coupled to the drill drive BA rotor 38 of the rotary feedthrough 32. The areas adjacent to the mouths of the transverse bores 36 in the outer surface 39 of the rotor 38th are sealed by chambered in the housing 34 sealing rings 40. The axial relative position of the housing 34 and the rotor 38 is ensured by a radial flange 42 on the rotor 38 and by a locking ring 43.
  • a flushing fluid SF such as e.g. Water
  • annular coupling jacket 44 of the pipe coupling 33 is firmly connected. Front side of the clutch housing 44, a limiting plate 45 and a fixing ring 46 extend.
  • two clamping jaws 47 are radially displaceable between the rotor 38 and the limiting disk 45 within the clutch casing 44.
  • the clamping jaws 47 are guided between two segment-like sliding bodies 49 which are supported on the inner surface 48 of the coupling jacket 44.
  • the clamping jaws 47 have thread segments 50 adapted to the first threaded section 4. Between the thread segments 50 and the sliding bodies 49 (FIG. 6) there are pocket-like recesses 51 in which helical compression springs 52 are inserted. The helical compression springs 52 attempt to displace the jaws 47 radially outward.
  • recesses 56 are incorporated in diametrical offset.
  • the recesses 56 extend from a radial shoulder 57 with a peripheral surface 58 and an adjoining inclined transition surface 59 into the inner surface 48 of the clutch shell 44th
  • the injection drill anchor 1 of FIGS. 1 and 2 can be pushed with its first threaded section 4 between the thread segments 50 as far as the stop against a sealing ring 60 in the rotor 38 (FIG. 5). If then the drill drive BA is activated, the rotor 38 and thus also the coupling jacket 44 of the pipe coupling 33 rotates according to the arrow 62 in FIGS. 6 and 7, so that the locking balls 54 are entrained and pressed radially inwards via the curved shape of the latching recesses 56 become. As a result, the clamping jaws 47 are displaced inwards, with the result that the thread segments 50 engage around the first threaded section 4 of the injection drilling anchor 1 in a positive and non-positive manner (FIG. 7).
  • a flushing fluid SF is fed to the rod end 21 via the connection 35 of the rotary leadthrough 32 and via the rotary leadthrough 32 and the longitudinal channel 3 in the steel tube 2, where the flushing fluid SF flows through the exit bores 30 in the rod end 21 and over the longitudinal channel 24 in the drill bit 15 can emerge (arrows 61 in Figure 1).
  • the resulting cuttings pass between the borehole wall and the injection drill anchor 1 in the direction of the borehole mouth.
  • care is taken that the pressure of the flushing fluid SF is not sufficient to lift the elastic sleeve 10 from the mouths of the transverse bores 7 within the inflatable tube 12.
  • the pipe coupling 33 is displaced in the direction of arrow 63 of Figure 7 that the locking balls 54 are displaced after reaching the locking recesses 56 due to the restoring force of the helical compression springs 52 in the recesses 56, so that the thread segments 50 of the jaws 47 detach from the first threaded portion 4.
  • the rotary feedthrough 32 and the pipe coupling 33 can then be removed from the first threaded portion 4.
  • a flexible locking ball 64 with a defined hardness in the longitudinal channel 3 of the steel pipe 2 is inserted ( Figure 2).
  • the diameter of the locking ball 64 is smaller than the diameter of the longitudinal channel 3, but larger than the diameter of the locking bore 26 in the rod head 21st
  • injection adapter 65 is rotated with a threaded sleeve 66 on the first threaded portion 4 of the steel pipe 2 until its end reaches a seal 67 in the interior of the threaded sleeve 66 to the plant ,
  • two diametrically protruding hand lever 68 are welded to the threaded sleeve.
  • the injection adapter 65 has a hose connection 70, a mixer 71 and a check valve 72 in the longitudinal direction of a pipe section 69 welded to the threaded sleeve 66.
  • the injection medium IM is dispensed (FIGS. 2 and 3).
  • the injection medium IM flows through the mixer 71 and the check valve 72 and enters the longitudinal channel 3 of the steel tube 2, where it displaces the locking ball 64 until it rests against the sealing seat 27 of the locking bore 26 (FIGS. 2 and 9).
  • the injection medium IM can not escape via the rod head 21 into the borehole. Rather, the injection medium IM will increase in pressure via the transverse bores 7 with expansion of the elastic sleeve 10 ( Figure 4) enter into the inflation tube 12 and compress the middle, located between the ferrules 14 area 73 against the borehole wall. By further increasing the injection pressure then the locking ball 64 deforms to an oval locking body (dash-dotted lines in Figure 9) and enters through the locking hole 26 in the interior 29 of the rod head 21 a. The injection medium IM can now pass from the interior 29 via the outlet holes 30 into the borehole. A transfer via the longitudinal channel 24 in the drill bit 15 is possibly possible.
  • the supply of injection medium IM is stopped. After hardening of the injection medium IM, the injection adapter 65 can be turned off from the first threaded section 4 after the injection line has been removed from the hose connection 70.

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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)
  • Nozzles (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Sewing Machines And Sewing (AREA)
  • Saccharide Compounds (AREA)

Claims (11)

  1. Ancre de forage (1) à injection, constituée d'au moins un tube d'acier (2) qui comprend un tronçon longitudinal médian (6) cylindrique et lisse sur la surface extérieure (9), et des tronçons filetés extérieurs extrêmes (4, 5) parmi lesquels un premier tronçon fileté (4) peut être accouplé, d'une part, avec un entraînement de forage (BA) et d'autre part, en substitution, avec un adaptateur d'injection (65) en vue de délivrer un fluide injecté (IM), et l'autre tronçon ou second tronçon fileté (5) peut être accouplé avec une tête cauliforme (21) portant une couronne de forage (15) et munie d'orifices (30) de sortie du fluide injecté (IM) et d'un fluide de rinçage (SF), sachant qu'un flexible expansible (12) est consigné à demeure sur le pourtour du tronçon longitudinal médian (6) pourvu d'au moins un perçage transversal (7) et sachant que, lorsque l'entraînement de forage (BA) est désaccouplé, une bille de blocage (64) déformable sous pression peut être introduite dans le canal longitudinal (3) du tube d'acier (2), caractérisée par le fait que le diamètre de ladite bille est plus petit que le diamètre dudit canal longitudinal (3), mais cependant plus grand que le diamètre d'un alésage de blocage (26) prévu, dans la tête cauliforme (21), à la transition entre le canal longitudinal (3) et un espace intérieur (29) situé dans ladite tête cauliforme (21) et doté d'un plus fort diamètre.
  2. Ancre de forage à injection selon la revendication 1, dans laquelle la tête cauliforme (21) est vissée sur le second tronçon fileté (5) par un embout taraudé (23) présentant un filetage intérieur (22).
  3. Ancre de forage à injection selon la revendication 1 ou 2, dans laquelle la couronne de forage (15) est consignée à demeure, par un capuchon vissable (17) muni d'un filetage intérieur (18), sur un mamelon (20) de la tête cauliforme (21) qui est pourvu d'un filetage extérieur (19).
  4. Ancre de forage à injection selon l'une des revendications 1 à 3, dans laquelle la couronne de forage (15) est munie d'un canal longitudinal (24).
  5. Ancre de forage à injection selon l'une des revendications 1 à 4, dans laquelle un manchon déflecteur (16), se rétrécissant coniquement en direction de la couronne de forage (15) jusque sur la surface extérieure (9) du tube d'acier (2), est fixé sur l'extrémité du flexible expansible (12) consigné à demeure par ses extrémités sur ledit tube d'acier (2), au moyen de douilles de compression (14), ladite extrémité étant tournée vers ladite couronne de forage (15).
  6. Ancre de forage à injection selon l'une des revendications 1 à 5, dans laquelle la paroi (8) du tube d'acier (2) est traversée, dans la région centrale du flexible expansible (12), par quatre perçages transversaux (7) respectivement décalés de 90° les uns des autres sur la périphérie et prévus par paires, en un agencement diamétral, dans deux plans transversaux parallèles (Q1, Q2).
  7. Ancre de forage à injection selon l'une des revendications 1 à 6, dans laquelle les embouchures des perçages transversaux (7), dans la surface extérieure (9) du tube d'acier (2), sont recouvertes par un fourreau élastique (10) ceinturant rigidement ledit tube d'acier (2).
  8. Ancre de forage à injection selon la revendication 7, dans laquelle la position axiale du fourreau élastique (10), sur le tube d'acier (2), est arrêtée par deux bagues de verrouillage (11) assujetties audit tube d'acier (2) aux faces frontales dudit fourreau (10).
  9. Ancre de forage à injection selon l'une des revendications 1 à 8, dans laquelle l'entraînement de forage (BA) comprend une traversée rotative (32) destinée à un fluide de rinçage (SF), et un accouplement tubulaire (33) qui est relié à ladite traversée rotative (32) et englobe deux mâchoires de serrage (47) pouvant accomplir des rotations limitées et pouvant effectuer des mouvements radiaux en opposition à une force de rappel élastique (52), avec des segments filetés intérieurs (50) adaptés au premier tronçon fileté (4), et des billes encliquetables (54) qui sont logées dans des creusures périphériques (53) et coopèrent avec la surface intérieure (48) de l'enveloppe d'accouplement (44) munie d'évidements d'encliquetage (56) à effet de blocage dans une direction périphérique, ladite surface étant pour le reste cylindrique.
  10. Ancre de forage à injection selon la revendication 9, dans laquelle la force de rappel élastique (52), destinée aux mâchoires de serrage (47) guidées à force dans le sens radial entre des corps de glissement (49) du type segments, prenant appui contre la surface intérieure (48) de l'enveloppe d'accouplement (44), est développée par des ressorts hélicoïdaux de pression disposés à côté des segments filetés (50).
  11. Ancre de forage à injection selon l'une des revendications 1 à 10, dans laquelle l'adaptateur d'injection (65), doté d'un embout vissable (66) affecté à la liaison avec le premier tronçon fileté (4), comprend un raccord (70) de flexible, un mélangeur (71) et un clapet antiretour (70) agencés en succession.
EP02021000A 2001-10-02 2002-09-20 Ancrage de forage et d'injection Expired - Lifetime EP1300546B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10148683 2001-10-02
DE10148683A DE10148683C1 (de) 2001-10-02 2001-10-02 Injektionsbohrsanker

Publications (2)

Publication Number Publication Date
EP1300546A1 EP1300546A1 (fr) 2003-04-09
EP1300546B1 true EP1300546B1 (fr) 2006-10-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02021000A Expired - Lifetime EP1300546B1 (fr) 2001-10-02 2002-09-20 Ancrage de forage et d'injection

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Country Link
EP (1) EP1300546B1 (fr)
AT (1) ATE343708T1 (fr)
DE (2) DE10148683C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10336040B4 (de) * 2003-08-01 2006-12-28 Hilti Ag Adapter für einen selbstbohrenden Gebirgsanker
WO2007059580A1 (fr) * 2005-11-24 2007-05-31 Peter Andrew Gray Boulon d’ancrage autoperceur
DE102008005452B4 (de) * 2008-01-21 2009-12-31 Dmi Injektionstechnik Gmbh Verfahren zum Verfestigen von Bodenabschnitten und Vorrichtung zur Durchführung des Verfahrens
DE102012201662A1 (de) * 2012-02-06 2013-08-08 Hilti Aktiengesellschaft Setzwerkzeug und Verfahren zur Montage einer Ankerstange
CN110593927B (zh) * 2019-09-30 2020-12-22 宁夏久威矿山安全工程有限责任公司 一种深浅可调式注浆结构及注浆方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE933328C (de) 1953-10-13 1956-05-03 Wilhelm Weghuber Verfahren zum Verbinden von Gesteinsschichten mittels Gesteinsanker im Bergbau und Mittel zur Ausuebung des Verfahrens
DE3145923C2 (de) 1981-11-20 1983-11-17 Dyckerhoff & Widmann AG, 8000 München Verspannvorrichtung für das Zugglied eines Ankers, insbesondere eines Felsankers
DE3400182A1 (de) 1984-01-04 1985-07-11 Friedr. Ischebeck GmbH, 5828 Ennepetal Injektionsanker
DE9004177U1 (fr) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen, De
DE4445626A1 (de) * 1994-12-21 1996-06-27 Willich F Berg Bautechnik Injektionsgleitbohranker
DE19702749A1 (de) * 1997-01-27 1998-07-30 Reburg Patentverwertungs Gmbh Verfahren zum Setzen eines Injektionsbohrankers und Vorrichtung zur Durchführung dieses Verfahrens

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Publication number Publication date
EP1300546A1 (fr) 2003-04-09
ATE343708T1 (de) 2006-11-15
DE50208530D1 (de) 2006-12-07
DE10148683C1 (de) 2002-10-24

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