DE1096848B - Hollow, perforated rock anchor - Google Patents

Hollow, perforated rock anchor

Info

Publication number
DE1096848B
DE1096848B DEV11751A DEV0011751A DE1096848B DE 1096848 B DE1096848 B DE 1096848B DE V11751 A DEV11751 A DE V11751A DE V0011751 A DEV0011751 A DE V0011751A DE 1096848 B DE1096848 B DE 1096848B
Authority
DE
Germany
Prior art keywords
anchor
hollow
perforation holes
sliding sleeve
rock
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.)
Pending
Application number
DEV11751A
Other languages
German (de)
Inventor
Wilhelm Boeddicker
Dr-Ing Habil Fritz Mohr
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.)
VERUSCHACHT VEREINIGTE UNTERTA
Original Assignee
VERUSCHACHT VEREINIGTE UNTERTA
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 VERUSCHACHT VEREINIGTE UNTERTA filed Critical VERUSCHACHT VEREINIGTE UNTERTA
Priority to DEV11751A priority Critical patent/DE1096848B/en
Priority to DEV9516A priority patent/DE1018820B/en
Priority to FR1193727D priority patent/FR1193727A/en
Priority to GB552/58A priority patent/GB831740A/en
Publication of DE1096848B publication Critical patent/DE1096848B/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/021—Grouting with inorganic components, e.g. cement
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D1/00—Sinking shafts
    • E21D1/10—Preparation of the ground
    • E21D1/16—Preparation of the ground by petrification
    • 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
    • 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
    • E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
    • 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
    • E21D21/008—Anchoring or tensioning means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D5/00—Lining shafts; Linings therefor
    • E21D5/012—Use of fluid-tight or anti-friction material on outside of, or between, lining layers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D5/00—Lining shafts; Linings therefor
    • E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/002—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor
    • F16B13/141—Fixing plugs in holes by the use of settable material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Piles And Underground Anchors (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Description

DEUTSCHESGERMAN

Gegenstand des Hauptpatents ist ein Verfahren zur Sicherung von. Schächten durch Ankerausbau, insbesondere zur Sicherung von mittels des Gefrierschachtverfahrens eingebrachten Schachtauskleidungen, welches dadurch gekennzeichnet ist, daß durch an sich bekannte, auf ihre Länge perforierte Anker und durch Eindrücken von Bindemitteln durch die Ankerperforationen zunächst in Entfernung von der Schachtauskleidung befindliche Gebirgsteile verfestigt und anschließend die zwischen den verfestigten Gebirgsteilen und der Schachtauskleidung befindlichen Gebirgsteile entwässert und verfestigt werden. Zwar sind perforierte Hohlanker zum Zuführen von Zementmilch in Bohrlöcher zwecks Einzementierung der Anker in verschiedenen Ausführungsformen bekannt, doch sind die bekannten Ausführungsformen für die Durchführung des Verfahrens nach dem Hauptpatent weniger geeignet.The subject of the main patent is a method for securing. Shafts by means of anchoring, in particular for securing manhole linings introduced by means of the freezing manhole method, which is characterized in that known per se, perforated along their length anchor and through Injection of binding agents through the anchor perforations, initially at a distance from the shaft lining located mountain parts solidified and then those between the solidified mountain parts and the rock parts located in the manhole lining are drained and consolidated. True, they are perforated Hollow anchor for feeding cement milk into drill holes for cementing the anchor in various embodiments are known, but are the known embodiments for the implementation of the method according to the main patent less suitable.

Die Erfindung betrifft in weiterer Ausbildung des Gegenstandes nach dem Hauptpatent einen hohlen, perforierten Gebirgsanker, der zur Durchführung des Verfahrens nach dem Hauptpatent besonders geeignet ist. Die Erfindung besteht darin, die über die Länge verteilten Perforationslöcher des Ankers abschnittsweise verschließbar zu machen, so daß es durch abschnittsweises Verschließen derselben leicht möglich ist, in der beschriebenen Weise zunächst in Entfernung von der Schachtauskleidung befindliche Gebirgsteile zu verfestigen und anschließend die zwischen den verfestigten Gebirgsteilen und der Schachtauskleidung befindlichen Gebirgsteile zu bearbeiten, z. B. entwässern und zu verfestigen.The invention relates to a further development of the object according to the main patent a hollow, perforated rock anchor, which is particularly suitable for carrying out the method according to the main patent is. The invention consists in the perforation holes of the anchor distributed over the length in sections to make closable, so that it is easily possible by closing the same in sections is, in the manner described, initially located at a distance from the shaft lining parts of the mountain to solidify and then between the solidified rock parts and the shaft lining to edit located mountain parts, z. B. dewater and solidify.

Im einzelnen läßt sich die Erfindung auf verschiedene Weise verwirklichen; so geht ein Vorschlag der Erfindung dahin, den Anker mit einer verschiebbaren oder drehbaren, die Perforationslöcher teilweise verdeckenden Schiebehülse zu versehen. Die Schiebehülse kann z. B. in Rohrform außen auf den Hohlanker aufgesetzt sein, es besteht aber auch die Möglichkeit, die Schiebehülse im Innern des Hohlankers unterzubringen. Um die über die Länge verteilten Perforationslöcher des Ankers abschnittsweise verschließbar zu machen, kann auch in der Hohlankerbohrung ein Kolben geführt sein, so daß durch Verstellen des letzteren die Perforationslöcher verschließbar sind. Im übrigen empfiehlt es sich, die in Achsrichtung des Ankers radialen Perforationslöcher der in ihrer Stärke geeignet bemessenen Hohlankerwandung in einem spitzen Winkel zur Ankerachse anzuordnen, so daß beim Austreten des Bindemittels über den Rückstoß der Anker gegen das Gebirge angezogen wird.In detail, the invention can be implemented in various ways; so goes a suggestion of the Invention to the anchor with a slidable or rotatable, the perforation holes partially covering To provide sliding sleeve. The sliding sleeve can, for. B. placed in tubular form on the outside of the hollow anchor be, but there is also the possibility of accommodating the sliding sleeve inside the hollow anchor. In order to close the perforation holes of the anchor that are distributed over the length in sections make, a piston can also be guided in the hollow anchor hole, so that by adjusting the latter the perforation holes can be closed. In addition, it is recommended that in the axial direction of the armature radial perforation holes of the hollow anchor wall, which is suitably dimensioned in terms of its strength, in one to arrange acute angle to the anchor axis, so that when the binder emerges over the recoil the anchor is tightened against the mountain.

Im folgenden wird die Erfindung an Hand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert; es zeigtIn the following, the invention is illustrated by means of a drawing that shows only one exemplary embodiment explained; it shows

Hohler, perforierter GebirgsankerHollow, perforated rock anchor

Zusatz zum Patent 1 018 820Addendum to patent 1,018,820

Anmelder:Applicant:

Veruschacht Vereinigte Unter tag-Scattered United Under Day

u. Schachtbau G.m.b.H.,u. Schachtbau G.m.b.H.,

Essen, Westendstr. 2Essen, Westendstr. 2

Dr.-Ing. habil. Fritz Mohr und Wilhelm Böddicker,Dr.-Ing. habil. Fritz Mohr and Wilhelm Böddicker,

Essen-Bredeney,
sind als Erfinder genannt wordenEssen-Bredeney,
have been named as inventors

Fig. 1 teilweise im Schnitt einen hohlen, perforierten Gebirgsanker mit außen aufgesetzter Verschiebehülse, Fig. 1 partially in section a hollow, perforated rock anchor with an externally attached sliding sleeve,

Fig. 2 eine Ausführungsform mit innen eingesetzter Verschiebehülse undFig. 2 shows an embodiment with an internally inserted sliding sleeve and

Fig. 3 eine Ausführungsform, bei der in der Hohlankerbohrung ein Kalben geführt ist.Fig. 3 shows an embodiment in which in the hollow anchor bore a calving is performed.

Bei den in den Fig. 1 bis 3 dargestellten hohlen, perforierten Gebirgsankern 1 sind sämtlich die Perforationslöcher 2 in den verhältnismäßig dicken Hohlankerwandungen in einem spitzen Winkel zur Achse des Hohlankers angeordnet, so daß die austretenden Bindemittel strahlartig diese Richtung erhalten und durch den Rückstoß der austretenden Bindemittel der Anker 1 in das Gebirge hineingezogen wird.In the case of the hollow, perforated rock anchors 1 shown in FIGS. 1 to 3, all of the perforation holes are 2 in the relatively thick hollow anchor walls at an acute angle to the axis of the hollow anchor arranged so that the emerging binders receive this direction like a jet and the anchor 1 is drawn into the rock by the recoil of the emerging binder.

Die übliche Ausbildung des Ankers mit Druckmittelanschluß und Spreizvorrichtung bedarf hier als nicht zur Erfindung gehörig nicht der Beschreibung. Bei den Ausführungsformen nach den Fig. 1 und 2 sind außerdem eine äußere (Fig. 1) bzw. eine innere (Fig. 2) Hülse 3 als Gleithülsen angeordnet, die den Zweck haben, während des Einpreßprozesses einen Teil der Perforierung 2 abzudecken, um den Austritt des Verfestigungsmittels so zu steuern, daß zunächst in Entfernung von der Schachtauskleidung befindliche Gebirgsteile und danach zwischenliegende verfestigt werden können.The usual design of the armature with pressure medium connection and expansion device is required here as does not belong to the invention does not belong to the description. In the embodiments according to FIGS. 1 and 2 are also an outer (Fig. 1) and an inner (Fig. 2) sleeve 3 arranged as sliding sleeves that the Have the purpose of covering part of the perforation 2 during the press-fitting process in order to prevent the outlet to control the solidifying agent so that initially located at a distance from the shaft lining Mountain parts and then intermediate parts can be solidified.

Fig. 3 zeigt, daß an Stelle einer Gleithülse 3 in der Hohlankerbohrung auch ein Kolben 4 geführt werden kann, der ein abschnittsweises Öffnen bzw. Schließen der Perforationslöcher 2 zuläßt.Fig. 3 shows that, instead of a sliding sleeve 3, a piston 4 is also guided in the hollow armature bore can, which allows the perforation holes 2 to be opened or closed in sections.

009 698/104009 698/104

Claims (6)

Patentansprüche:Patent claims: 1. Hohler, perforierter Gebirgsanker zur Durchführung eines Verfahrens zur Sicherung von Schächten durch Ankerausbau, insbesondere zur Sicherung von mittels des Gefrierschachtverfahrens eingebrachten Schachtauskleidungen, bei dem durch Eindrücken von Bindemitteln durch Ankerperforationen, zunächst in Entfernung von der Schachtauskleidung befindliche Gebirgsteile und anschließend zwischen den verfestigten Gebirgsteilen und der Schachtauskleidung befindliche Gebirgsteile verfestigt werden, nach dem Hauptpatent 1 018 820, dadurch gekennzeichnet, daß die über seine Länge verteilten Perforationslöcher (2) des Ankers (1) abschnittsweise verschließbar sind.1. Hollow, perforated rock anchor for carrying out a method for securing Shafts by means of anchoring, in particular for securing by means of the freezing shaft method installed manhole linings, in which by pressing binding agents through anchor perforations, mountain parts located at a distance from the shaft lining and then between the solidified rock parts and the rock parts located in the manhole lining are consolidated, according to the main patent 1 018 820, characterized in that the perforation holes (2) distributed over its length of the anchor (1) can be closed in sections. 2. Anker nach Anspruch 1, dadurch gekennzeichnet, daß der Anker (1) mit einer verschiebbaren oder drehbaren, die Perforationslöcher teilweise verdeckendien Schiebehülse (3) versehen ist.2. Anchor according to claim 1, characterized in that that the anchor (1) with a slidable or rotatable, the perforation holes partially conceal the sliding sleeve (3) is provided. 3. Anker nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Schiebehülse (3)3. An anchor according to claims 1 and 2, characterized in that the sliding sleeve (3) in Rohrform außen auf den Hohlanker aufgesetzt ist.is placed in tubular form on the outside of the hollow anchor. 4. Anker nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Schiebehülse (3) im Innern des Hohlankers untergebracht ist.4. An anchor according to claims 1 and 2, characterized in that the sliding sleeve (3) inside of the hollow anchor is housed. 5. Anker nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß in der Hohl ankerbohr ung ein Kolben (4) geführt und durch Verstellen des letzteren die Perforationslöcher (2) verschließbar sind.5. An anchor according to claims 1 and 2, characterized in that an anchor hole in the hollow Piston (4) guided and the perforation holes (2) can be closed by adjusting the latter are. 6. Anker nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die in Achsprojektion des Ankers (1) radialen Perforationslöcher (2) der Hohlankerwandung in einem spitzen Winkel zur Ankerachse angeordnet sind.6. Anchor according to claims 1 to 5, characterized in that the axial projection of the armature (1) radial perforation holes (2) in the hollow anchor wall at an acute angle to the anchor axis are arranged. In Betracht gezogene Druckschriften:
Deutsche Patentschriften Nr. 933 328, 936 082;
österreichische Patentschrift Nr. 180 552;
schweizerische Patentschrift Nr. 90 630·;
Bergmännische Zeitschrift »Glückauf«, 1952, S. 1087.Considered publications:
German Patent Nos. 933 328, 936 082;
Austrian Patent No. 180 552;
Swiss Patent No. 90 630 ·;
Mining magazine "Glückauf", 1952, p. 1087. Hierzu 1 Blatt Zeichnungen1 sheet of drawings © 009 698/104 1.61© 009 698/104 1.61
DEV11751A 1954-01-02 1954-01-02 Hollow, perforated rock anchor Pending DE1096848B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DEV11751A DE1096848B (en) 1954-01-02 1954-01-02 Hollow, perforated rock anchor
DEV9516A DE1018820B (en) 1954-01-02 1955-09-24 Procedure for securing shafts by means of anchoring
FR1193727D FR1193727A (en) 1954-01-02 1958-01-07 Perforated tube for anchoring in the ground
GB552/58A GB831740A (en) 1954-01-02 1958-01-07 Improvements in anchor bolts for the lining of shafts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV11751A DE1096848B (en) 1954-01-02 1954-01-02 Hollow, perforated rock anchor

Publications (1)

Publication Number Publication Date
DE1096848B true DE1096848B (en) 1961-01-12

Family

ID=27213258

Family Applications (2)

Application Number Title Priority Date Filing Date
DEV11751A Pending DE1096848B (en) 1954-01-02 1954-01-02 Hollow, perforated rock anchor
DEV9516A Pending DE1018820B (en) 1954-01-02 1955-09-24 Procedure for securing shafts by means of anchoring

Family Applications After (1)

Application Number Title Priority Date Filing Date
DEV9516A Pending DE1018820B (en) 1954-01-02 1955-09-24 Procedure for securing shafts by means of anchoring

Country Status (3)

Country Link
DE (2) DE1096848B (en)
FR (1) FR1193727A (en)
GB (1) GB831740A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182185B (en) * 1961-06-15 1964-11-26 Erich Fritz Dipl Ing Mountain anchor for the expansion of underground spaces
DE1247991B (en) * 1962-07-05 1967-08-24 Grand Rapids Arrangement for closing a borehole for cementing a rock bolt
DE3151611A1 (en) * 1981-12-28 1983-07-07 Hilti AG, 9494 Schaan "FILLING NOZZLE FOR CURABLE DIMENSIONS IN HOLLOW ARMERS"
DE3724165A1 (en) * 1986-09-10 1988-03-24 Gd Anker Gmbh & Co Kg MOUNTAIN ANCHOR

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234742A (en) * 1962-07-05 1966-02-15 Chester I Williams Groutable rock bolt assembly and procedure
DE2658403A1 (en) * 1976-12-23 1978-06-29 Zueblin Ag Tunnelling and tubbing plate anchorage system - includes concrete application and systematic anchor bolt insertion immediately after cutting operation
GB2138528A (en) * 1983-04-16 1984-10-24 Perard Torque Tension Ltd Rock Bolt Assembly
DE3717816C2 (en) * 1987-01-13 1993-10-14 Unistrut Europ Plc Bedford Holding and support anchors
GB2250558A (en) * 1990-09-26 1992-06-10 Brian Peter Briscombe Bonded wall fixing
US5957643A (en) * 1996-10-12 1999-09-28 Fischerwerke Artur Fischer Fastening element with expansible member
EP0863261A1 (en) * 1997-03-04 1998-09-09 Foresight Products, LLC Ground anchor assembly and method for installing same
DE102004020852B4 (en) 2004-04-28 2006-07-13 Hilti Ag concrete dowel
CN104846821A (en) * 2015-04-30 2015-08-19 广西大学 Hollow-tube seam type anchor rod and mounting method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH90630A (en) * 1920-12-20 1921-09-16 August Wolfsholz Presszementba Process for sealing, securing and strengthening shafts and tunnels in loose rock layers.
AT180552B (en) * 1952-10-18 1954-12-27 Adolf Fredrik Flygare Method and device for the expansion of pits and other spaces using anchors
DE933328C (en) * 1953-10-13 1956-05-03 Wilhelm Weghuber Method for connecting rock layers by means of rock bolts in mining and means for practicing the method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT91457B (en) * 1920-12-15 1923-02-26 August Wolfsholz Presszementba Method for securing loose rock layers in mining.
FR1074328A (en) * 1952-04-10 1954-10-05 Bochumer Eisenhu Tte Heintzman Improvements made to support systems with tie rods for mine galleries

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH90630A (en) * 1920-12-20 1921-09-16 August Wolfsholz Presszementba Process for sealing, securing and strengthening shafts and tunnels in loose rock layers.
AT180552B (en) * 1952-10-18 1954-12-27 Adolf Fredrik Flygare Method and device for the expansion of pits and other spaces using anchors
DE933328C (en) * 1953-10-13 1956-05-03 Wilhelm Weghuber Method for connecting rock layers by means of rock bolts in mining and means for practicing the method
DE936082C (en) * 1954-01-02 1956-07-12 Wilhelm Weghuber Method for joining rock strata in mining and means of practicing the method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182185B (en) * 1961-06-15 1964-11-26 Erich Fritz Dipl Ing Mountain anchor for the expansion of underground spaces
DE1247991B (en) * 1962-07-05 1967-08-24 Grand Rapids Arrangement for closing a borehole for cementing a rock bolt
DE3151611A1 (en) * 1981-12-28 1983-07-07 Hilti AG, 9494 Schaan "FILLING NOZZLE FOR CURABLE DIMENSIONS IN HOLLOW ARMERS"
DE3724165A1 (en) * 1986-09-10 1988-03-24 Gd Anker Gmbh & Co Kg MOUNTAIN ANCHOR

Also Published As

Publication number Publication date
GB831740A (en) 1960-03-30
DE1018820B (en) 1957-11-07
FR1193727A (en) 1959-11-04

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