WO1991015657A1 - Injection drilling anchor - Google Patents
Injection drilling anchor Download PDFInfo
- Publication number
- WO1991015657A1 WO1991015657A1 PCT/EP1991/000692 EP9100692W WO9115657A1 WO 1991015657 A1 WO1991015657 A1 WO 1991015657A1 EP 9100692 W EP9100692 W EP 9100692W WO 9115657 A1 WO9115657 A1 WO 9115657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection
- section
- anchor
- drill
- designed
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 238000005553 drilling Methods 0.000 title claims abstract description 15
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 6
- 239000000057 synthetic resin Substances 0.000 claims abstract description 6
- 238000005065 mining Methods 0.000 claims abstract description 4
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 230000009172 bursting Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000003019 stabilising effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000027455 binding Effects 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
-
- 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
-
- 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
- E21D21/0053—Anchoring-bolts in the form of lost drilling rods
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Definitions
- the invention relates to an injection drill anchor for securing lines and spaces by injection of, for example, synthetic resin, in particular in mining and tunnel construction, which consists of an anchor pipe which can be assembled from at least two sections which can be connected to one another via sleeves and which is connected to the anchor directed deepest to the borehole ⁇ tip has a drill bit, as well as flushing * and injection openings and which is provided with a borehole closure and at the end protruding from the borehole with a detachable connecting element.
- Drill anchors consist of an anchor tube, at the tip of which a welded or attachable, so-called lost drill bit is attached.
- the anchor pipe is initially used as a drill pipe and subsequently as an anchor, the anchor pipe being filled after drilling, for example with adhesive mortar, in order to fill the annular space and the upcoming gaps in the mountains.
- a particular advantage of using drill anchors of this type is that the anchor tubes can be made from sections that can be assembled via sleeves and are thus suitable for being introduced from narrow distances.
- the drill anchors are introduced using rotary or impact drills.
- a particular disadvantage when using drill anchors with lost drill bits is the difficulty in adequately sealing the borehole, in particular when injecting a two-component synthetic resin, with correspondingly high pressures.
- an injection tube is also known which is suitable for bonding loosened mountain areas by injections with strengthening agents, in particular in the face, at face edges and geological disturbances.
- borehole closures in the form of so-called inflatable packers are applied to the injection pipe. Due to the arrangement of corresponding check valves, the inflation packer is inflated to such an extent by the injection pressure that there is a tight contact with the borehole wall so that the actual injection process can then be carried out.
- the invention has for its object to provide an injection drill anchor, which is suitable to be used when equipped with a lost drill bit and extendable over corresponding sections both as a drill pipe and as an anchor tube, using rotation - and impact drills avoid the difficulties of inserting anchor rods, especially in common mountains, and which allows the use of synthetic resins that can be pressed in under high pressures, thereby making it possible to completely seal the borehole.
- section designed as a drill with a connecting element designed as a drilling adapter is interchangeable with a section designed as an anchor tube, the section being provided with a borehole closure.
- the injection drill anchor can be adjusted to any desired length via several sections and corresponding socket connections, a check valve in the form of a rupture disk being provided in the connection socket of the last section, which has a bochloch closure in the form of an inflatable packer.
- stops are provided within the internally threaded sleeves, which are designed in connection with a screw-in end of a section for locking the rupture disk.
- the interchangeable anchor tube section which receives the inflatable packer, can be replaced at the end with a thread for receiving an injection head or for receiving a dome nut for the dome plate.
- the inflatable packer is known as an inflatable hose section surrounding the anchor tube section and held at the ends by bindings is formed, a non-return valve being integrated between the anchor rod and blowing space to prevent the return from the blowing space.
- the advantage of the injection drill anchor according to the invention is to be seen in particular in the fact that, when the borehole is produced by the function of the anchor rod as a drill, the drilling cuttings are adequately transported by flushing with water or air, and that the subsequent drilling Function of the same rod as an anchor ensures that the destruction of the borehole produced by pulling out the entire rod or by broken mineral or rock is avoided.
- the interchangeability of the last section of the whole is designed as a drill or as an anchor Rods also ensure that the borehole in question is completely and securely sealed while saving injection material.
- FIG. 1 - a schematic representation of an exemplary embodiment of an injection drill anchor as it is designed according to the invention for drilling a borehole
- FIG. 2 shows a likewise schematic and sectional representation of an exemplary embodiment of an injection drill anchor as it is designed for the subsequent injection and anchoring, including a borehole closure.
- the injection drill anchor essentially consists of an anchor tube 1, which is composed of sections 2 and 3 via a sleeve 7.
- section 2 is provided with a lost drill bit 4 * and also has flushing or injection openings 5 and 6.
- Sections 2 can be smooth-walled or profiled for later better adhesion.
- the sleeve 7 is provided with internal threads 8 and has stops 9 between the ends of the sections 2 and 3.
- the section 3 is provided at the end protruding from the borehole mouth with a schematically illustrated drilling adapter 12 which can be screwed onto the thread 11. With this design or divided into further sections, the anchor tube 1 is initially used to create a borehole.
- FIG. 2 shows an embodiment of an injection drill anchor in which section 3, which is initially required to produce a borehole, is replaced by a section 13.
- the section 13 is threaded at the end protruding from the borehole provided for receiving an injection head and has a check valve 19.
- Section 13 is also provided with a so-called inflatable packer 14 for sealing off the borehole.
- the inflatable packer 14 essentially consists of a hose section 21 which is fixed immovably on the section 13 by means of covers 17, 18.
- bores 15 are provided in the section 13, which are sealed by a sleeve 16 and are designed as a check valve.
- a rupture disk 10 is inserted, which is locked in position between a stop 9 and the end of a section 2 or 13.
- the openings provided as flushing openings 5, 6 in the production of the borehole now serve as injection openings.
- the inner channel of the anchor tube 1 initially serves as a flushing channel when a drill hole is made in the rock, in order to use the flushing medium to remove the cuttings from the drill hole via the annular space.
- the inflation space of the inflatable packer 14 is inflated in such a way that a tight, all-round contact with the borehole wall is achieved.
- the further increasing pressure of the injection destroys the rupture disk 10 and the annular space or the fissures in the mountains are injected.
- a spherical cap plate is screwed onto the end of the anchor tube protruding from the mouth of the borehole.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Composite anchor pipes for stabilising headings and spaces by the injection of e.g. synthetic resin, especially in mining and tunnelling, consist of at least two sections which can be secured together by sleeves and are fitted with a drilling cone and rinsing and injection apertures at the deepest end of the drilling. The anchor pipes have a drilling closure and a releasable connector at the end projecting from the drilling. For the use of such anchor pipes simultaneously as drilling rods and anchors, the section (3) in the form of a drill, which is fitted with a connector designed as a drill adapter (12) is interchangeable with a section (13) designed as an anchor pipe (1), said section (13) being fitted with a bore-hole closure (14) and a non-return valve (19).
Description
Injektionsbohranker Injection drill anchor
Die Erfindung betrifft einen Injektionsbohranker zur Sicherung von Strecken und Räumen durch Injek¬ tion von beispielsweise Kunstharz, insbesondere im Berg- und Tunnelbau, der aus einem aus mindestens zwei über Muffen miteinander verbindbaren Ab¬ schnitten zusammensetzbaren Ankerrohr besteht, das an der zum Bohrlochtiefsten gerichteten Anker¬ spitze eine Bohrkrone, sowie Spül* und Injektions¬ öffnungen aufweist und das mit einem Bohrloch¬ verschluß sowie an dem aus dem Bohrloch herausra¬ genden Ende mit einem lösbaren Anschlußelement versehen ist.The invention relates to an injection drill anchor for securing lines and spaces by injection of, for example, synthetic resin, in particular in mining and tunnel construction, which consists of an anchor pipe which can be assembled from at least two sections which can be connected to one another via sleeves and which is connected to the anchor directed deepest to the borehole ¬ tip has a drill bit, as well as flushing * and injection openings and which is provided with a borehole closure and at the end protruding from the borehole with a detachable connecting element.
Es ist seit langem bekannt, insbesondere im Unter¬ tagebergbau, um das Gebirge zur Sicherung des Streckenhohlraumes in seinem Verband zu erhalten, die Strecken durch Ankerausbau zu unterstützen. Zu diesem Zweck werden üblicherweise in ein Bohrloch Klebepatronen eingeführt, die anschließend durch das Eindrehen der Ankerstange zerstört werden und durch Mischung zweier Komponenten die Ankerstange
über die gesamte Länge im Bohrloch verkleben. Bei der Durchführung einer derartigen Ankerung treten dann Probleme auf, wenn das Gebirge bereits aufge¬ lockert ist, und das Herstellen von Bohrlöchern bzw. das nachfolgende Einbringen von Klebepatronen und Ankerstangen in das Bohrlochtiefste nicht mehr möglich ist.It has been known for a long time, in particular in underground mining, in order to maintain the mountains in its association for securing the section cavity, to support the sections by anchoring. For this purpose, adhesive cartridges are usually inserted into a borehole, which are subsequently destroyed by screwing in the anchor rod and by mixing two components, the anchor rod Glue the entire length in the borehole. Problems occur when such anchoring is carried out when the mountains have already been loosened and it is no longer possible to produce boreholes or the subsequent insertion of adhesive cartridges and anchor rods into the deepest borehole.
Derartige Schwierigkeiten umgeht man durch die Verwendung von Bohrankern. Bohranker bestehen aus einem Ankerrohr, an dessen Spitze eine ange¬ schweißte oder aufsteckbare, sogenannte verlorene Bohrkrone angebracht ist. Das Ankerrohr wird zunächst als Bohrgestänge und im Nachhinein als Anker verwendet, wobei das Ankerrohr nach dem Ab- bohren, beispielsweise mit Klebemörtel beschickt wird, um den Ringraum und die anstehenden Klüfte im Gebirge zu verfüllen. Ein besonderer Vorteil der Verwendung derartiger Bohranker besteht darin, daß die Ankerrohre aus über Muffen zusammensetz¬ bare Abschnitte verlängerbar ausgebildet sind und auf diese Weise geeignet sind, aus beengten Strecken eingebracht zu werden. Die Bohranker wer¬ den über Dreh- oder Schlagbohrmaschinen einge¬ bracht. Ein besonderer Nachteil bei der Verwendung von Bohrankern mit verlorenen Bohrkronen besteht in der Schwierigkeit, das Bohrloch insbesondere bei Injizierung eines Zweikomponenten-Kunstharzes mit entsprechend hohen Drücken ausreichend abzu¬ dichten.Such difficulties are avoided by using drill anchors. Drill anchors consist of an anchor tube, at the tip of which a welded or attachable, so-called lost drill bit is attached. The anchor pipe is initially used as a drill pipe and subsequently as an anchor, the anchor pipe being filled after drilling, for example with adhesive mortar, in order to fill the annular space and the upcoming gaps in the mountains. A particular advantage of using drill anchors of this type is that the anchor tubes can be made from sections that can be assembled via sleeves and are thus suitable for being introduced from narrow distances. The drill anchors are introduced using rotary or impact drills. A particular disadvantage when using drill anchors with lost drill bits is the difficulty in adequately sealing the borehole, in particular when injecting a two-component synthetic resin, with correspondingly high pressures.
Für das Injizieren von Zementmörtel werden auf das Bohrgestänge aufschraubbare Bohrlochverschlüsse verwendet, die für die vorgesehenen Drücke beim
Injizieren von aufschäumenden Kunstharzen völlig ungeeignet sind.For the injection of cement mortar screw-on screw caps are used, which are suitable for the intended pressures at the Injecting foaming synthetic resins are completely unsuitable.
Nach dem DE-G 89 06 126 ist darüber hinaus ein In¬ jektionsrohr bekannt, das geeignet ist, aufge¬ lockerte Gebirgsbereiche durch Injektionen mit Verfestigungsmitteln, insbesondere im Streb, an Strebrändern und geologischen Störungen, zu ver¬ kleben. Zur Abdichtung des Bohrloches werden auf das Injektionsrohr Bohrlochverschlüsse in Form von sogenannten Blähpackern aufgebracht. Durch die An¬ ordnung entsprechender Rückschlagventile wird zu¬ nächst durch den Injektionsdruck der Blähpacker derartig aufgebläht, daß eine dichte Anlage an der Bohrlochwandung vorhanden ist, um anschließend den eigentlichen Injektionsvorgang durchführen zu kön¬ nen.According to DE-G 89 06 126, an injection tube is also known which is suitable for bonding loosened mountain areas by injections with strengthening agents, in particular in the face, at face edges and geological disturbances. To seal the borehole, borehole closures in the form of so-called inflatable packers are applied to the injection pipe. Due to the arrangement of corresponding check valves, the inflation packer is inflated to such an extent by the injection pressure that there is a tight contact with the borehole wall so that the actual injection process can then be carried out.
Ausgehend von dem beschriebenen Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Injektionsbohranker zu schaffen, der geeignet ist, bei Bestückung mit einer verlorenen Bohrkrone und über entsprechende Abschnitte verlängerbar sowohl als Bohrgestänge als auch als Ankerrohr verwendet zu werden, wobei unter Verwendung von Dreh- und Schlagbohrmaschinen die Schwierigkeiten des Ein¬ bringens von Ankerstangen, insbesondere in gebrä- ches Gebirge -umgangen werden, und der die Verwen¬ dung von unter hohen Drücken einpreßbaren Kunst¬ harzen erlaubt, wobei eine vollständige Abdichtung des Bohrlochs ermöglicht wird.Based on the described prior art, the invention has for its object to provide an injection drill anchor, which is suitable to be used when equipped with a lost drill bit and extendable over corresponding sections both as a drill pipe and as an anchor tube, using rotation - and impact drills avoid the difficulties of inserting anchor rods, especially in common mountains, and which allows the use of synthetic resins that can be pressed in under high pressures, thereby making it possible to completely seal the borehole.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der als Bohrer ausgebildete Abschnitt, der mit
einem als Bohradapter ausgebildeten Anschlußele¬ ment versehen ist, gegen einen als Ankerrohr ausgebildeten Abschnitt austauschbar ist, wobei der Abschnitt mit einem Bohrlochverschluß versehen ist.This object is achieved in that the section designed as a drill with a connecting element designed as a drilling adapter is interchangeable with a section designed as an anchor tube, the section being provided with a borehole closure.
Für den Einsatz der Injektionsbohranker ist es selbstverständlich, daß im Anschluß an die vor¬ genommene Injektion auf das Ankerende unter Ver¬ wendung einer ein entsprechendes Widerlager bil¬ denden Schraubenmutter eine Kalottenplatte aufge¬ schraubt wird.For the use of the injection drill anchors, it goes without saying that, following the injection which has been carried out, a spherical cap plate is screwed onto the anchor end using a screw nut which forms a corresponding abutment.
Der Injektionsbohranker kann über mehrere Ab¬ schnitte und entsprechende Muffe:nverbindungen auf jede gewünschte Länge eingestellt werden, wobei in der Verbindungsmuffe des letzten, einen Bochloch- verSchluß in Form eines Blähpackers aufweisenden Abschnitts ein Rückschlagventil in Form einer Berstscheibe vorgesehen ist. Zu diesem Zweck sind innerhalb der mit Innengewinde versehenen Muffen Anschläge vorgesehen, die in Verbindung mit einem einschraubbaren Ende eines Abschnitts zur Arretie¬ rung der Berstscheibe ausgebildet sind. Der gegen¬ über dem letzten mit der Bohrfunktion beauf¬ schlagten Abschnitt austauschbare, den Blähpacker aufnehmende Ankerrohrabschnitt weist am Ende ein Gewinde zur Aufnahme eines Injektionskopfes bzw. zur Aufnahme einer Kalottenmutter für die Kalottenplatte auf.The injection drill anchor can be adjusted to any desired length via several sections and corresponding socket connections, a check valve in the form of a rupture disk being provided in the connection socket of the last section, which has a bochloch closure in the form of an inflatable packer. For this purpose, stops are provided within the internally threaded sleeves, which are designed in connection with a screw-in end of a section for locking the rupture disk. The interchangeable anchor tube section, which receives the inflatable packer, can be replaced at the end with a thread for receiving an injection head or for receiving a dome nut for the dome plate.
Darüber hinaus ist in das mit einem Gewinde ver¬ sehene Ende ein weiteres Rückschlagventil eingear¬ beitet. Der Blähpacker ist in bekannter Weise als
ein das Ankerrohrabschnitt umgebender und an den Enden durch Einbände gehaltener, aufblähbarer Schlauchabschnitt ausgebildet, wobei zwischen Ankerstange und Blähraum ein Rückschlagventil zur Vermeidung des Rücklaufs aus dem Blähraum inte¬ griert ist.In addition, a further check valve is incorporated in the threaded end. The inflatable packer is known as an inflatable hose section surrounding the anchor tube section and held at the ends by bindings is formed, a non-return valve being integrated between the anchor rod and blowing space to prevent the return from the blowing space.
Der Vorteil des erfindungsgemäßen Injektionsbohr¬ ankers ist insbesondere darin zu sehen, daß zu¬ nächst beim Herstellen des Bohrlochs durch die Funktion der Ankerstange als Bohrer durch die Spü¬ lung mit Wasser oder Luft ein ausreichender Trans¬ port des Bohrkleins stattfindet und daß durch die anschließende Funktion des gleichen Gestänges als Anker die Gewährleistung eintritt, daß die durch Herausziehen des gesamten Gestänges oder durch ge- bräches Mineral bzw. Gebirge verursachte Zerstö¬ rung des hergestellten Bohrlochs vermieden wird, Die Austauschbarkeit des letzten Abschnitts des gesamten als Bohrer bzw. als Anker ausgebildeten Gestänges gewährleistet darüber hinaus unter Ein¬ sparung von Injektionsmaterial ein vollständiges und sicheres Abdichten des betreffenden Bohrlochs.The advantage of the injection drill anchor according to the invention is to be seen in particular in the fact that, when the borehole is produced by the function of the anchor rod as a drill, the drilling cuttings are adequately transported by flushing with water or air, and that the subsequent drilling Function of the same rod as an anchor ensures that the destruction of the borehole produced by pulling out the entire rod or by broken mineral or rock is avoided. The interchangeability of the last section of the whole is designed as a drill or as an anchor Rods also ensure that the borehole in question is completely and securely sealed while saving injection material.
Ein Auführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden nä¬ her erläutert.An exemplary embodiment of the invention is shown in the drawings and is explained in more detail below.
Es zeigen:Show it:
Figur. 1 - eine schematisierte Wiedergabe eines Ausführungsbeispieles eines Injektions¬ bohrankers, wie er erfindungsgemäß zum Abbohren eines Bohrlochs ausgebildet ist und
Figur 2 - eine ebenfalls schematisierte und ge¬ schnittene Wiedergabe eines Ausfüh- rungsbeispieles eines Injektionsbohr¬ ankers, wie er zum anschließenden Inji¬ zieren und Ankern ausgebildet ist unter Einbeziehung eines Bohrlochverschlus¬ ses.Figure. 1 - a schematic representation of an exemplary embodiment of an injection drill anchor as it is designed according to the invention for drilling a borehole, and FIG. 2 shows a likewise schematic and sectional representation of an exemplary embodiment of an injection drill anchor as it is designed for the subsequent injection and anchoring, including a borehole closure.
Der Injektionsbohranker nach dem Ausführungsbei- spiel, wie in Figur 1 beschrieben, besteht im we¬ sentlichen aus einem Ankerrohr 1, das aus den Ab¬ schnitten 2 und 3 über eine Muffe 7 zusammenge¬ setzt ist. An dem zum Bohrlochtiefsten gerichteten Ende ist der Abschnitt 2 mit einer verlorenen Bohrkrone 4 versehen *und weist darüber hinaus Spül- bzw. Injektionsδffnungen 5 und 6 auf. Die Abschnitte 2 können glattwandig oder zur späteren besseren Haftung auch profiliert ausgebildet sein. Die Muffe 7 ist jeweils mit Innengewinden 8 verse¬ hen und weist zwischen den Enden der Abschnitte 2 und 3 Anschläge 9 auf. Der Abschnitt 3 ist an dem aus dem Bohrlochmund herausragenden Ende mit einem auf das Gewinde 11 aufschraubbaren schematisiert dargestellten Bohradapter 12 versehen. Mit dieser Ausbildung oder unterteilt in weitere Abschnitte wird das Ankerrohr 1 zunächst zur Erstellung eines Bohrlochs verwende .The injection drill anchor according to the exemplary embodiment, as described in FIG. 1, essentially consists of an anchor tube 1, which is composed of sections 2 and 3 via a sleeve 7. At the end facing the deepest of the borehole, section 2 is provided with a lost drill bit 4 * and also has flushing or injection openings 5 and 6. Sections 2 can be smooth-walled or profiled for later better adhesion. The sleeve 7 is provided with internal threads 8 and has stops 9 between the ends of the sections 2 and 3. The section 3 is provided at the end protruding from the borehole mouth with a schematically illustrated drilling adapter 12 which can be screwed onto the thread 11. With this design or divided into further sections, the anchor tube 1 is initially used to create a borehole.
In Figur 2 ist ein Ausführungsbeispiel eines In¬ jektionsbohrankers dargestellt, bei welchem der zunächst zur Erstellung eines Bohrlochs erforder¬ liche Abschnitt 3 gegen einen Abschnitt 13 aus¬ getauscht ist. Der Abschnitt 13 ist an dem aus dem Bohrloch herausragenden Ende mit einem Gewinde 20
zur Aufnahme eines I jektionskopfes versehen und weist ein Rückschlagventil 19 auf. Des weiteren ist der Abschnitt 13 mit einem sogenannten Bläh¬ packer 14 zur Bohrlochabdichtung versehen. Der Blähpacker 14 besteht im wesentlichen aus einem Schlauchabschnitt 21, der über Einbände 17, 18 auf dem Abschnitt 13 unverrückbar befestigt ist. Zur Verfüllung des Blähraums des Schlauchabschnitts 21 sind in dem Abschnitt 13 Bohrungen 15 vorgesehen, die über eine Manschette 16 abgedichtet und als Rückschlagventil ausgebildet sind. Am vorderen Ende des Abschnitts 13, und zwar innerhalb der Muffe 7 ist eine Berstscheibe 10 eingelegt, die zwischen einem Anschlag 9 und dem Ende eines Ab¬ schnitts 2 bzw. 13 in ihrer Position arretiert wird. Die bei der Herstellung des Bohrlochs als Spülöffnungen 5, 6 vorgesehenen Öffnungen dienen nunmehr als Injektionsöffnungen.FIG. 2 shows an embodiment of an injection drill anchor in which section 3, which is initially required to produce a borehole, is replaced by a section 13. The section 13 is threaded at the end protruding from the borehole provided for receiving an injection head and has a check valve 19. Section 13 is also provided with a so-called inflatable packer 14 for sealing off the borehole. The inflatable packer 14 essentially consists of a hose section 21 which is fixed immovably on the section 13 by means of covers 17, 18. For filling the blowing space of the hose section 21, bores 15 are provided in the section 13, which are sealed by a sleeve 16 and are designed as a check valve. At the front end of section 13, namely within the sleeve 7, a rupture disk 10 is inserted, which is locked in position between a stop 9 and the end of a section 2 or 13. The openings provided as flushing openings 5, 6 in the production of the borehole now serve as injection openings.
Beim Einbringen eines Injektionsbohrankers dient zunächst der Innenkanal des Ankerrohres 1 beim Er¬ stellen eines Bohrlochs im Gestein als Spülkanal, um mit Hilfe des Spülmediums das Bohrklein über den Ringraum aus dem Bohrloch abzutransportieren.When an injection drill anchor is introduced, the inner channel of the anchor tube 1 initially serves as a flushing channel when a drill hole is made in the rock, in order to use the flushing medium to remove the cuttings from the drill hole via the annular space.
Nach dem Einbohren des aus mehreren Abschnitten 2 zusammensetzbaren Ankerrohres 1 wird dieses nur soweit aus dem Bohrloch herausgezogen, daß der letzte Abschnitt 3 aus der Muffenverbindung gelöst und gegen einen Abschnitt 13 ausgetauscht wird, der mit einem Blähpacker 14 und dem Anschluß für einen Injektionskopf ausgerüstet ist.After drilling in the anchor pipe 1, which can be assembled from several sections 2, it is only pulled out of the borehole to the extent that the last section 3 is released from the socket connection and replaced with a section 13 which is equipped with an inflatable packer 14 and the connection for an injection head .
Bei der Durchführung der Injektion wird zunächst
durch die als Ruckschlagventil dienende Berst¬ scheibe 10 der Blähraum des Blähpackers 14 derart aufgebläht, daß eine dichte, allseitige Anlage an der Bohrlochwandung erzielt wird. Der weiter an¬ steigende Druck der Injektion zerstört die Berst¬ scheibe 10 und es erfolgt die Injektion des Ring¬ raumes bzw. der Klüfte im Gebirge. Nach dem Ab¬ schluß der Injektion wird eine Kalottenplatte auf das aus dem Bohrlochmund herausragende Ende des Ankerrohres aufgeschraubt.
When performing the injection, first of all through the bursting disk 10 serving as a check valve, the inflation space of the inflatable packer 14 is inflated in such a way that a tight, all-round contact with the borehole wall is achieved. The further increasing pressure of the injection destroys the rupture disk 10 and the annular space or the fissures in the mountains are injected. After the end of the injection, a spherical cap plate is screwed onto the end of the anchor tube protruding from the mouth of the borehole.
1 Ankerrohr1 anchor tube
2 Abschnitt2 section
3 Abschnitt3 section
4 Bohrkrone4 core bits
5, 6 Spül- bzw. Injektions¬ öffnungen5, 6 rinsing or injection openings
7 Muffe7 sleeve
8 Innengewinde8 internal threads
9 Anschlag9 stop
10 Berstscheibe10 rupture disc
11 Gewinde11 threads
12 Bohradapter12 drilling adapters
13 Abschnitt13 section
14 Blähpacker14 inflatable packers
15 Bohrungen15 holes
16 Manschette 17, 18 Einband16 cuffs 17, 18 cover
19 Rückschlagventil19 check valve
20 Gewinde20 threads
21 Schlauchabschnitt
21 hose section
Claims
1. Injektionsbohranker zur Sicherung von Strecken und Räumen durch Injektion von beispielsweise Kunst¬ harz, insbesondere im Berg- und Tunnelbau, der aus einem aus mindestens zwei über Muffen miteinander verbindbaren Abschnitten zusammensetzbaren Anker¬ rohr besteht, das an der zum Bohrlochtiefsten gerichteten Ankerspitze eine Bohrkrone, sowie Spül- und Injektionsöffnungen aufweist und das mit einem Bohrlochverschluß sowie an dem aus dem Bohr¬ loch herausragenden Ende mit einem lösbaren An¬ schlußelement versehen ist, dadurch gekennzeich¬ net, daß der als Bohrer ausgebildete Abschnitt (3), der mit einem als Bohradapter (12) ausge¬ bildeten Anschlußelement versehen ist, gegen einen als Ankerrohr (1) ausgebildeten Abschnitt (13) austauschbar ist, wobei der Abschnitt (13) mit einem Bochlochverschluß und einem Rückschlagventil versehen ist. 1. Injection drill anchors for securing routes and spaces by injection of, for example, synthetic resin, in particular in mining and tunnel construction, which consists of an anchor pipe which can be assembled from at least two sections which can be connected to one another by sleeves and which has a drill bit at the anchor tip which is the deepest in the borehole , and has flushing and injection openings and which is provided with a borehole closure and at the end protruding from the borehole with a releasable connecting element, characterized in that the section (3) designed as a drill, which has a Drilling adapter (12) trained connection element is provided, can be exchanged for a section (13) designed as an anchor tube (1), the section (13) being provided with a boring hole closure and a check valve.
2. Injektionsbohranker nach Anspruch 1, dadurch ge¬ kennzeichnet, daß das Rückschlagventil als Berst¬ scheibe (10) ausgebildet ist.2. Injection drill anchor according to claim 1, characterized in that the check valve is designed as a bursting disc (10).
3. Injektionsbohranker nach Anspruch 1, dadurch ge¬ kennzeichnet, daß der BohrlochverSchluß als Bläh¬ packer (14) ausgebildet ist.3. injection drill anchor according to claim 1, characterized ge indicates that the BohrlochverSchluß is designed as a inflatable packer (14).
4. Injektionsbohranker nach Anspruch 1, dadurch ge¬ kennzeichnet, daß der Abschnitt (13) an beiden En¬ den mit Rückschlagventilen (10, 18) versehen ist.4. injection drill anchor according to claim 1, characterized ge indicates that the section (13) is provided at both ends with check valves (10, 18).
5. Injektionsbohranker nach Anspruch 4, dadurch ge¬ kennzeichnet, daß das Rückschlagventil (10) als Berstscheibe ausgebildet ist.5. injection drill anchor according to claim 4, characterized ge indicates that the check valve (10) is designed as a rupture disc.
6. Injektionsbohranker nach Anspruch 1 , dadurch ge¬ kennzeichnet, daß die die Abschnitte (2, 3; 2, 13) miteinander verbindende Muffe (7) mit einem die Enden der Abschnitte (2, 3; 2, 13) aufnehmenden Anschlag (9) versehen ist und daß der Anschlag (9) zur Arretierung eines Rückschlagventiles (10) aus¬ gebildet ist. 6. injection drill anchor according to claim 1, characterized ge indicates that the sections (2, 3; 2, 13) connecting sleeve (7) with a the ends of the sections (2, 3; 2, 13) receiving stop (9th ) is provided and that the stop (9) is designed for locking a check valve (10).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL91296327A PL168194B1 (en) | 1990-04-11 | 1991-04-10 | Injection type drilling anchor |
DE59102272T DE59102272D1 (en) | 1990-04-11 | 1991-04-10 | INJECTION DRILLING RANK. |
EP91907426A EP0524223B1 (en) | 1990-04-11 | 1991-04-10 | Injection drilling anchor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG9004177.1U | 1990-04-11 | ||
DE9004177U DE9004177U1 (en) | 1990-04-11 | 1990-04-11 | Injection drilling anchor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991015657A1 true WO1991015657A1 (en) | 1991-10-17 |
Family
ID=6852815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1991/000692 WO1991015657A1 (en) | 1990-04-11 | 1991-04-10 | Injection drilling anchor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0524223B1 (en) |
DE (2) | DE9004177U1 (en) |
PL (1) | PL168194B1 (en) |
WO (1) | WO1991015657A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2689175A1 (en) * | 1992-03-26 | 1993-10-01 | Schmidt Kranz Co Gmbh | Impregnation probe. |
WO1996020331A1 (en) * | 1994-12-24 | 1996-07-04 | Reburg-Patentverwertungsgesellschaft Mbh | Injection valve |
WO2001057363A1 (en) * | 2000-02-05 | 2001-08-09 | Jora-Tec Gmbh | Injection anchor |
EP1108818A3 (en) * | 1999-12-13 | 2002-06-05 | KELLER GRUNDBAU GmbH | Active foundation |
DE10148683C1 (en) * | 2001-10-02 | 2002-10-24 | Schmidt & Co Gmbh Kranz | Injection bore anchor has steel tube with smooth outer surface section and bore drive with exchangeable adaptor |
DE102008005452A1 (en) * | 2008-01-21 | 2009-07-30 | Dmi Injektionstechnik Gmbh | Process for consolidating soil sections and device for carrying out the process |
AT510139A1 (en) * | 2010-07-02 | 2012-01-15 | Soellinger Johann | DEVICE FOR SEALING AND FIXING A PIPE INSERTED IN A BOREOUR HOLE |
EP2354448A3 (en) * | 2010-01-28 | 2018-01-03 | Küchler Technik AG | Self-drilling anchor with drill anchor seal |
CN113969798A (en) * | 2021-09-08 | 2022-01-25 | 齐鲁理工学院 | Anchoring device for supporting coal mine tunnel roof |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4128154C2 (en) * | 1991-07-02 | 1994-06-16 | Gd Anker Gmbh & Co Kg | Injection tube and method for placing a rock anchor |
WO1993001363A1 (en) * | 1991-07-02 | 1993-01-21 | Gd-Anker Gmbh | Injection pipe and process for setting a rock anchor |
IT1275231B (en) * | 1995-02-09 | 1997-07-31 | Sireg S P A Soc It Di Ricerca | DEVICE FOR REINFORCEMENT THE CONSOLIDATION AND STABILIZATION OF THE LAND PARTICULARLY SUITABLE FOR PREVENTING LANDSLIDES OR DEFORMATIONS OF THE EXCAVATION FRONT IN GALLERIES OR EXCAVATIONS IN THE TRENCH |
CN107119669A (en) * | 2017-05-23 | 2017-09-01 | 中交第二航务工程局有限公司 | For shield, the pre-pouring grout consolidated subsoil method in house is worn in side in water-rich sand layer |
CN110925002B (en) * | 2019-12-04 | 2024-07-05 | 平顶山天安煤业股份有限公司十一矿 | Resin-filled shearing-resistant anchor rod and processing and manufacturing method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717024A1 (en) * | 1987-05-21 | 1988-12-01 | Willich F Gmbh & Co | Device for drilling boreholes and injecting stabilising material |
DE8906126U1 (en) * | 1989-05-18 | 1990-04-19 | Bergwerksverband Gmbh, 4300 Essen | Injection pipe with anchor effect |
-
1990
- 1990-04-11 DE DE9004177U patent/DE9004177U1/en not_active Expired - Lifetime
-
1991
- 1991-04-10 EP EP91907426A patent/EP0524223B1/en not_active Expired - Lifetime
- 1991-04-10 PL PL91296327A patent/PL168194B1/en unknown
- 1991-04-10 WO PCT/EP1991/000692 patent/WO1991015657A1/en active IP Right Grant
- 1991-04-10 DE DE59102272T patent/DE59102272D1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717024A1 (en) * | 1987-05-21 | 1988-12-01 | Willich F Gmbh & Co | Device for drilling boreholes and injecting stabilising material |
DE8906126U1 (en) * | 1989-05-18 | 1990-04-19 | Bergwerksverband Gmbh, 4300 Essen | Injection pipe with anchor effect |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2689175A1 (en) * | 1992-03-26 | 1993-10-01 | Schmidt Kranz Co Gmbh | Impregnation probe. |
WO1996020331A1 (en) * | 1994-12-24 | 1996-07-04 | Reburg-Patentverwertungsgesellschaft Mbh | Injection valve |
EP1108818A3 (en) * | 1999-12-13 | 2002-06-05 | KELLER GRUNDBAU GmbH | Active foundation |
WO2001057363A1 (en) * | 2000-02-05 | 2001-08-09 | Jora-Tec Gmbh | Injection anchor |
DE10148683C1 (en) * | 2001-10-02 | 2002-10-24 | Schmidt & Co Gmbh Kranz | Injection bore anchor has steel tube with smooth outer surface section and bore drive with exchangeable adaptor |
EP1300546A1 (en) | 2001-10-02 | 2003-04-09 | Schmidt, Kranz & Co. GmbH | Injection drilling anchor |
DE102008005452A1 (en) * | 2008-01-21 | 2009-07-30 | Dmi Injektionstechnik Gmbh | Process for consolidating soil sections and device for carrying out the process |
DE102008005452B4 (en) * | 2008-01-21 | 2009-12-31 | Dmi Injektionstechnik Gmbh | Process for consolidating soil sections and device for carrying out the process |
EP2354448A3 (en) * | 2010-01-28 | 2018-01-03 | Küchler Technik AG | Self-drilling anchor with drill anchor seal |
AT510139A1 (en) * | 2010-07-02 | 2012-01-15 | Soellinger Johann | DEVICE FOR SEALING AND FIXING A PIPE INSERTED IN A BOREOUR HOLE |
AT510139B1 (en) * | 2010-07-02 | 2015-05-15 | Söllinger Johann | DEVICE FOR SEALING AND FIXING A PIPE INSERTED IN A BOREOUR HOLE |
CN113969798A (en) * | 2021-09-08 | 2022-01-25 | 齐鲁理工学院 | Anchoring device for supporting coal mine tunnel roof |
CN113969798B (en) * | 2021-09-08 | 2023-09-26 | 齐鲁理工学院 | Anchoring device for supporting roof of coal mine tunnel |
Also Published As
Publication number | Publication date |
---|---|
PL168194B1 (en) | 1996-01-31 |
EP0524223A1 (en) | 1993-01-27 |
DE59102272D1 (en) | 1994-08-25 |
DE9004177U1 (en) | 1990-06-28 |
EP0524223B1 (en) | 1994-07-20 |
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