NO761514L - PROCEDURE AND DEVICE FOR STRENGTHENING COVERINGS IN MINING. - Google Patents
PROCEDURE AND DEVICE FOR STRENGTHENING COVERINGS IN MINING.Info
- Publication number
- NO761514L NO761514L NO761514A NO761514A NO761514L NO 761514 L NO761514 L NO 761514L NO 761514 A NO761514 A NO 761514A NO 761514 A NO761514 A NO 761514A NO 761514 L NO761514 L NO 761514L
- Authority
- NO
- Norway
- Prior art keywords
- rod
- hole
- sleeve
- wedge
- split
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000005728 strengthening Methods 0.000 title 1
- 238000004873 anchoring Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 206010044625 Trichorrhexis Diseases 0.000 claims 2
- 229920000728 polyester Polymers 0.000 claims 1
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
- F16B13/0858—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with an expansible sleeve or dowel body driven against a tapered or spherical expander plug
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Insulated Conductors (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- General Preparation And Processing Of Foods (AREA)
- Piles And Underground Anchors (AREA)
Description
Fremgangsmåte til forankring av fremreProcedure for anchoring the front
ende av en stang eller bolt.end of a rod or bolt.
Foreliggende oppfinnelse angår forbedringerThe present invention relates to improvements
ved fremgangsmåter og anordninger beregnet for sikringby methods and devices intended for protection
. og festning av vegger i gruveganger, og særlig til forankring av stenger og bolter som innsettes for dette formål. . and fortification of walls in mine passages, and in particular for anchoring rods and bolts that are inserted for this purpose.
Det er kjent å benytte stenger eller bolterIt is known to use rods or bolts
av flere meters lengde for å holde på plass vegger i gruveganger, hvilke bolter innføres og forankres i huller av tilsvarende lengde og som skal sikre veggen i den nødvendige tid. of several meters in length to hold walls in place in mine passages, which bolts are introduced and anchored in holes of a corresponding length and which will secure the wall for the necessary time.
Disse anordninger må være relativt billige ogThese devices must be relatively cheap and
de behøver ikke å overdimensjoneres på grunn av at de bare skal vare noen år. Dessuten skal de være lette å anbringe og på den annen side må de holdes sikkert på plass uten risiko for plutselig løsning fra hullet. Man benytter f.eks. stålstenger, hvis fremre ende på forhånd er oppsplittet aksialt og stikker stengene i bunnen av hullet, hvor virk-ningen av en innsatt kile bevirker at de to halvdeler av splittenden tvinges fra hverandre og ut mot veggene i hullet omkring enden. they do not need to be oversized due to the fact that they should only last a few years. Moreover, they must be easy to place and, on the other hand, they must be held securely in place without the risk of sudden loosening from the hole. One uses e.g. steel rods, whose front end is split axially in advance and sticks the rods in the bottom of the hole, where the action of an inserted wedge causes the two halves of the split end to be forced apart and out against the walls of the hole around the end.
Imidlertid er en slik forankring relativt svak, fordi utstikkende kanter i hullet motsetter seg nedføring av stangen og utvidelsen som fremtvinges av kilen er relativt begrenset. I forhold til denne begrensede og nærmest punkt-vise forankring, tilveiebringer oppfinnelsen en forbedring som hovedsakelig beror på at forankringen finner sted over en hel sylindersone og at stangen ikke hindres i å settes helt ned i bunnen av hullet. However, such an anchorage is relatively weak, because projecting edges in the hole oppose lowering of the rod and the expansion forced by the wedge is relatively limited. In relation to this limited and almost point-wise anchoring, the invention provides an improvement which is mainly due to the fact that the anchoring takes place over an entire cylinder zone and that the rod is not prevented from being completely inserted into the bottom of the hole.
For å oppnå dette foreslås ifølge oppfinnelsenTo achieve this is proposed according to the invention
å anbringe, i fremre ende av stangen, en sylinder eller mansjett to place, at the forward end of the rod, a cylinder or sleeve
av samme materiale som stangen, og oppsplittet langs en generatrise, slik at den kan utvides radialt, slik.at endene spriker fra hverandre ved kilevirkning i det øyeblikk stangen treffer bunnen i hullet. of the same material as the rod, and split along a generatrix, so that it can be expanded radially, so that the ends split apart by wedge action the moment the rod hits the bottom of the hole.
Oppfinnelsen omfatter således både fremgangsmåten til forankring som benytter en slik utvidbar mansjett i for-bindelse med et kjent kilesystem, samt den anordning som består av en kombinasjon av en kjent glass fiberstav av aksiale fibre sammenføyet med polyesterharpiks og en hylse av samme materiale oppsplittet langs en generatrise og hvis diameter er noe mindre enn hulldiameteren, og gjenget inn på fremre ende av stangen i den sonen hvor stangen er oppsplittet, slik at mansjetten vil tvinges til å sprike fra hverandre når stangen slås ned mot bunnen i hullet. The invention thus includes both the method for anchoring which uses such an expandable cuff in connection with a known wedge system, as well as the device which consists of a combination of a known glass fiber rod of axial fibers joined with polyester resin and a sleeve of the same material split along a generatrix and whose diameter is somewhat smaller than the hole diameter, and threaded into the front end of the rod in the zone where the rod is split, so that the cuff will be forced to split apart when the rod is struck down towards the bottom of the hole.
På tegningen er det vist en anordning i henhold The drawing shows a device according to
til oppfinnelsen og virkemåten.to the invention and the way it works.
I fig. 1 vises et aksialsnitt gjennom bunnen i hullet og fremre del av en forankringsstang som er på vei ned og før kilen.har trådt i funksjon. In fig. 1 shows an axial section through the bottom of the hole and the front part of an anchor rod which is on its way down and before the wedge has come into operation.
Fig. 2 er et tverrsnitt gjennom planet 2-2 på Fig. 2 is a cross-section through the plane 2-2 on
fig. 1,fig. 1,
fig. 3 er et lignende snitt på fig. 3, men viser fig. 3 is a similar section in fig. 3, but shows
det stadium hvor kilen nettop har truffet bunnen i hullet, the stage where the wedge has just hit the bottom of the hole,
fig. 4 er et lignende snitt som fig. 3, og viser stadiet hvor kilen har tvunget de oppsplittede bena fra . hverandre og forankret boltenden, og fig. 4 is a similar section to fig. 3, showing the stage where the wedge has forced the split legs from . each other and anchored the bolt end, and
fig. 5 er et snitt gjennom planet V-V på fig.4. På tegningene angir henvisningstallet 1 bunnen i et hull som skal oppta en forankringsbolt i en gruvegang fig. 5 is a section through plane V-V in fig.4. In the drawings, the reference number 1 indicates the bottom of a hole which is to receive an anchor bolt in a mine passage
eller lignende. Forankringsbolten 3 består på kjent måte av parallelt orienterte glassfibre sammenføyet med polyesterharpiks og settes ned i hullet i pilretningen F, idet boltens fremre ende 4 har et innhakk som opptar spissen 5 av kilen 2 slik at kilen ved sammenstøt med bunnen i hullet, driver de to splitthalvdeler av boltenden fra hverandre. etc. The anchoring bolt 3 consists in a known manner of parallel oriented glass fibers joined with polyester resin and is inserted into the hole in the direction of the arrow F, with the front end 4 of the bolt having a notch which occupies the tip 5 of the wedge 2 so that the wedge, on impact with the bottom of the hole, drives the two split halves of the bolt end apart.
På den samme fremre enden av bolten eller stangen 3, er det nå i henhold til oppfinnelsen gjenget på en hylse eller mansjett 6, av samme materiale som bolten 3 og med noe On the same front end of the bolt or rod 3, there is now, according to the invention, threaded on a sleeve or sleeve 6, of the same material as the bolt 3 and with some
mindre diameter enn hulldiameteren 1.smaller diameter than the hole diameter 1.
Som man ser bedre på fig. 2, er hylsen 6 oppsplittet langs en generatrise 7, hvilket gjør det mulig for den å utvide seg som forklart nedenfor. As can be seen better in fig. 2, the sleeve 6 is split along a generatrix 7, which enables it to expand as explained below.
Utførelsen av fremgangsmåten i henhold til oppfinnelsen består i å innføre som vanlig bolten 3 i hullet til fremre ende av kilen 2 kommer i kontakt med bunnen. Når stangen 3 fortsetter bevegelsen forbi punktet 5 vil ikke bare halvdelene 3a og 3b av boltenden tvinges fra hverandre i pilretningen F som på fig. 4, men også hylsen 6 gjennomgår en tilsvarende utvidelse, idet spalten 7 utvides som det fremgår best av fig. 5, slik at den sylindriske sideflate på hylsen 6 The implementation of the method according to the invention consists in introducing the bolt 3 into the hole as usual until the front end of the wedge 2 comes into contact with the bottom. When the rod 3 continues its movement past the point 5, not only will the halves 3a and 3b of the bolt end be forced apart in the direction of arrow F as in fig. 4, but also the sleeve 6 undergoes a corresponding expansion, the slot 7 being expanded as can best be seen from fig. 5, so that the cylindrical side surface of the sleeve 6
trenger inn i den omgivende borehullvegg, som man klart ser på fig. 3. penetrates into the surrounding borehole wall, which can be clearly seen in fig. 3.
Det skal bemerkes at fra det øyeblikk hylsen 6It should be noted that from the moment the sleeve 6
har begynt å trenge inn i de omgivende deler av hullet, står hylsen fast i aksial retning, men motsetter seg for det første ikke at stangen 3 slås mot bunnen i hullet, mens på den annen side denne innslåing av stangen, som skjer uten hindring, medvirker til utvidelse av stangen 3 ved kilevirkningen sam-tidig som den radiale utvidelse av hylsen 6 presser hylsen stadig tettere inn i bunnområdet omkring hullet. Som tid- has begun to penetrate into the surrounding parts of the hole, the sleeve is fixed in the axial direction, but firstly does not oppose that the rod 3 is struck against the bottom of the hole, while on the other hand this driving in of the rod, which occurs without obstruction, contributes to the expansion of the rod 3 by the wedge action at the same time as the radial expansion of the sleeve 6 presses the sleeve ever more tightly into the bottom area around the hole. As time-
ligere nevnt kan bolten 3 således føres inn helt til bunnen av hullet og oppnå maksimal utvidelse som kilen 2 kan gi, as mentioned above, the bolt 3 can thus be inserted all the way to the bottom of the hole and achieve the maximum expansion that the wedge 2 can provide,
slik at mansjetten 6 kan tvinges så kraftigog langt inn i hullets sidevegger som mulig, for derved å gi et bedre feste både ved tykkelsen av hylseinntrengningen i terrenget og gjennom den kontaktflate som dannes av den sylindriske sideflaten for mansjetten 6, mens man til sammenligning med en tidligere kjent metode bare oppnådde forankring ved inntrengning av kanten av fremre del av stangen 3, hvilket bare tilsvarer en enkel punktforankring. Et system omtrent som kilen 2' gjør det mulig å feste en holdeplate 8 i hullåpningen ved utvidelse av de to splittender 9a,9b ved innhamring av kilen 2' med hammeren 10. so that the sleeve 6 can be forced as strongly and far into the side walls of the hole as possible, thereby providing a better attachment both through the thickness of the sleeve penetration into the terrain and through the contact surface formed by the cylindrical side surface of the sleeve 6, while in comparison with a previously known method only achieved anchoring by penetrating the edge of the front part of the rod 3, which only corresponds to a simple point anchoring. A system much like the wedge 2' makes it possible to attach a holding plate 8 in the hole opening by expanding the two splitting ends 9a, 9b when hammering the wedge 2' with the hammer 10.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7600304A FR2337812A1 (en) | 1976-01-08 | 1976-01-08 | Mine support anchor bolt - has glass fibre reinforced rod and split collar expanded by wedge against bottom of hole (SW 1.8.77) |
Publications (1)
Publication Number | Publication Date |
---|---|
NO761514L true NO761514L (en) | 1977-07-11 |
Family
ID=9167697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO761514A NO761514L (en) | 1976-01-08 | 1976-05-03 | PROCEDURE AND DEVICE FOR STRENGTHENING COVERINGS IN MINING. |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR2337812A1 (en) |
NO (1) | NO761514L (en) |
SE (1) | SE418520B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1524469A (en) * | 1976-08-13 | 1978-09-13 | Ici Ltd | Dowel device for grouting in a drillhole |
DE3100733A1 (en) * | 1981-01-13 | 1982-08-26 | Termofix Betonbrenn GmbH, 7145 Markgröningen | METHOD FOR FASTENING OBJECTS TO FINISHED CONCRETE OR STONE WALLS, AND DEVICE FOR IMPLEMENTING THE METHOD |
FI64224C (en) * | 1981-04-22 | 1983-10-10 | Neste Oy | BERGBULT |
DE3514011C1 (en) * | 1985-04-18 | 1987-01-08 | Messerschmitt Boelkow Blohm | Clamping device |
FR2610957B1 (en) * | 1987-02-13 | 1989-07-07 | Batiborne Sarl Batiment Fabr B | STAKE FOR FIXING THE TERMINAL OF A TERMINAL OR OTHER MARK, AND METHOD FOR ITS PLACEMENT |
DE102006022696A1 (en) * | 2006-05-16 | 2007-11-22 | Flörchinger, Ludwig | Method, retaining dowel and drilling tool for the subsequent fixation of insulation boards on a building wall |
WO2018232426A1 (en) * | 2017-06-12 | 2018-12-20 | Ncm Innovations (Pty) Ltd | A method of adapting a rock bolt for improved resin anchoring |
WO2020154761A1 (en) * | 2019-01-29 | 2020-08-06 | Support Technologies Innovations Pty Ltd | Rock bolt |
-
1976
- 1976-01-08 FR FR7600304A patent/FR2337812A1/en active Granted
- 1976-05-03 NO NO761514A patent/NO761514L/en unknown
- 1976-05-03 SE SE7605049A patent/SE418520B/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE418520B (en) | 1981-06-09 |
FR2337812A1 (en) | 1977-08-05 |
SE7605049L (en) | 1977-07-09 |
FR2337812B1 (en) | 1980-02-22 |
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