GB2241759A - Anchoring of bolts in boreholes - Google Patents
Anchoring of bolts in boreholes Download PDFInfo
- Publication number
- GB2241759A GB2241759A GB9005377A GB9005377A GB2241759A GB 2241759 A GB2241759 A GB 2241759A GB 9005377 A GB9005377 A GB 9005377A GB 9005377 A GB9005377 A GB 9005377A GB 2241759 A GB2241759 A GB 2241759A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anchoring means
- load bearing
- borehole
- bearing annulus
- container
- 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.)
- Withdrawn
Links
- 238000004873 anchoring Methods 0.000 title claims abstract description 38
- 239000002775 capsule Substances 0.000 claims abstract description 24
- 239000008187 granular material Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 239000004568 cement Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000002452 interceptive effect Effects 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000011342 resin composition Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 229920006305 unsaturated polyester Polymers 0.000 claims description 2
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000009472 formulation Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- WIJWBOWLVOOYFR-BDSSXFGHSA-N (9R,13R)-1a,1b-dinor-10,11-dihydro-12-oxo-15-phytoenoic acid Chemical compound CC\C=C/C[C@@H]1[C@H](CCCCCC(O)=O)CCC1=O WIJWBOWLVOOYFR-BDSSXFGHSA-N 0.000 description 1
- JIGUICYYOYEXFS-UHFFFAOYSA-N 3-tert-butylbenzene-1,2-diol Chemical compound CC(C)(C)C1=CC=CC(O)=C1O JIGUICYYOYEXFS-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 1
- 241001674048 Phthiraptera Species 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 229910052849 andalusite Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229960002380 dibutyl phthalate Drugs 0.000 description 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 1
- 229960001826 dimethylphthalate Drugs 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- -1 setting accelerators Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
An anchor bolt (20) is quickly point anchored in a borehole (10) by means of a capsule (1) having two compartments (A and B). Compartment (B) which, in use is nearest the blind end of the borehole (10), contains a first anchoring means to form an adjustable load bearing annulus (C), and compartment (A) defines a second anchoring means to provide a permanent load bearing annulus (D), e.g. of set resin. In use, the capsule (1) is pushed up the hole (10) followed by the bolt (20) which is driven through the capsule and rotated.
Description
POINT ANCHORING
The invention relates to point anchoring, i.e. a system by which the end portion of an anchor element, typically an elongate bolt, is anchored by and in an anchoring medium in the blind end of a borehole. Usually the hole will be present in the roof or floor of an underground excavation, e.g. a mine; a building construction, civil engineering or the lice.
There is proposed in EP patent application 87.311072 (0278172) (CBP167 COG) a system of anchoring in which granular aggregate is placed in the blind end of the borehole and then the suitably shaped head of an anchor element is driven into the aggregate. On tensioning the element the granules are caused to slide over each other and interlock to form a load bearing annulus. The aggregate is selected from one having a relatively low aggregate crushing value; suitable materials are those having few natural fracture planes so that they are resistant to the crushing forces applied during the compaction. Examples of suitable mineral materials include andalusite, andesite, basalt, dolomite, emery and flint; metal may also be used.In a much preferred technique the granules of aggregate are placed in the blind end of the borehole in a frangible capsule which has a perforated or otherwise water-permeable wall. It is customary to include a dry cement powder, setting accelerators, thixotropic agents and the like in the capsule and to dip the capsule in water immediately before placement so that the cement powder will set hydraulically to enhance the properties of the anchorage. This extra step of wetting is inconvenient, and in some cases can slow the rate of advancement of an excavation or construction.
It is also known to use a resin or cementitious self-setting composition to anchor an anchor element in a borehole. Typically the resin or cementitious composition is presented in a capsule having two compartments, one containing an unhardened resin or ccement and the other the hardener therefor. The anchor element is placed in the hole and rotated to break the wall of the capsule to mix the interactive components to form an annulus of set material between the element and the wall of the borehole.
Where the composition is a resin this may be, e.g. polyester, epoxy, polyurethane; sometimes such resin or cement formulations contain water as an ingredient (or as a consequence of other ingredients deliberately added). In sone cases one interactive component is a dry cement and the other is water; the dry cement is presented in capsule having a water-permeable wall, e.g.
perforated and the capsule is dipped in water before being placed in the borehole. The formulation may be cementitious, e.g. OPC or HAC, in which case there may be addition of water as the setting agent just prior to placement of the capsule in the borehole.
The invention is based upon the observation that if a first anchoring means, preferably a capsule containing the defined aggregate and the cement powder is placed in the borehole followed by a self-setting composition as a second anchoring means, either in grout form or contained in a second capsule, when the anchor element is advanced to break the capsules open, a satisfactory anchorage is speedily formed. There are other advantages too.
According to the invention in one aspect there is provided a method of anchoring an element in a borehole therefor, the method comprising the steps of: a) placing in the borehole
i) a first anchoring means adapted to form an adjustable
load bearing annulus, and
ii) a second anchoring means settable to form a permanent
load bearing annulus, b) advancing the element towards the blind end of the borehole
to contact the second anchoring means to start the setting
thereof and into contact with the first anchoring means, and c) tensioning the element with respect to the first anchoring
means thereby to cause the first anchoring means to form an
adjustable load bearing annulus.
By virtue of the invention an anchor element may be point anchored with the benefit of a supplementary permanent set anchorage very quickly, often in less than 10 seconds. Such a system is particularly well suited to mechanical or automated installation of anchors.
Preferably the first anchoring means comprises a mass of loose granular material of low aggregate crushing value and arranged so that tensioning of the element compacts the granular material and causes the granules to slide over each and interlock to form an adjustable load bearing annulus. It is a preferred feature of the invention that the mass of loose granular material also contains a hydraulically settable material. Although the water to set any such hydraulically settable material can be derived from the ingredients of the self-setting formulation of the second anchoring means, our investigations suggest that in some cases at least there will be moisture in the borehole or in the strata in which the borehole is formed.The self-setting reaction of the interactive components of the composition comprising the second anchoring means is usually exothermic and the heat evolved can be sufficient to vaporise the moisture to react with the cement to set it.
Preferably each anchoring means is presented in a capsule, and most preferably the two capsules are arranged in line in a common container.
In another aspect, the invention provides a container comprising a generally cylindrical body having two end portions, each defining a longitudinal compartment, one of which contains a particulate mass comprising a granular material having few natural fracture planes and a dry hydraulically setting material to form an adjustable load bearing annulus and the other compartment contains the interactive components of a selfsetting composition to form a permanently set load bearing annulus.
The quantity of the materials will be related to the size of the annulus between the wall of the borehole and the diameter of the anchor element. The granular material will have a void volume in the uncompacted condition which is related to the volume of the anchor element to be anchored. The dry cement provides a hydraulic set to the load-bearing annulus, bit in addition has the ability to occupy void space.
In a preferred resin composition for the second anchoring means, the interactive unsaturated resin is unsaturated polyester in styrene, an inhibitor such as t-butyl catechol and a promoter such as dimethylaniline may also be present. Inorganic fillers such as calcium carbonate, silica sand, talc, calcium sulphate, etc will be present. The catalyst therefor comprises typically benzoyl peroxide dispersed in a liquid such as dimethylphthalate, together with a filler such as dolomite. Other suitable resin compositions are based on epoxy and polyurethane. Specific cementitious compositions comprise retarded systems based on high alumina cement, blast furnace slag and retarder and accelerators so as to effect set or mixing.
By virtue of the invention an anchor element can be anchored quickly, i.e. in about 10 seconds or less to give an immediate point anchor which will undergo minimal movement when the element is tensioned. The second anchoring means sets to provide a permanent set, ensuring containment of the first anchoring means.
The hydration of the cement in the first anchoring means reinforces the anchorage.
In order that the invention may be well understood it will now be described with reference to the accompanying diagrammatic drawings, in which:
Figure 1 is a side view, partly in section, of a container
of the invention containing two anchoring means arranged in
line;
Figure 2 is an elevation of a borehole showing the container
and the anchor bolt during anchoring; and
Figure 3 is the same view as Figure 2 showing the anchor
bolt of Figure 2 in the anchored condition.
The container of Figure 1 comprises an outer flexible tube 1 formed of paper, woven plastics, wire mesh or the like. The tube wall may be solid or perforated. The tube is sealed at both ends, i.e. by a crimped metal or plastics clip 2 or wax or other sealing means. The tube is divided into two longitudinal portions A, B of substantially equal volume. A capsule having a flexible plastics wall is present in portion A and contains a resin formulation comprising polyester resin in styrene monomer, limestone filler and water and a catalyst component comprising benzoyl peroxide and dibutylphthalate. The resin and catalyst components are housed in separate compartments 5,6. The compartment B houses a mixture 4 of loose granular material, e.g.
emery or the like having an aggregate crushing value of about 10, and a dry OPC in a weight ratio of about 90:10.
In use, the container 1 is placed in an overhead hole 10 in a mine roof 11 with the end portion B leading so that when the anchor bolt is inserted the portion A is proximal and the portion
B distal to the head of the bolt. An anchor element comprising a bolt 20 having a head 21 which has a radially extending gap G defined by upwardly and downwardly inclined sidewalls 22, 23, is according to the disclosure of our patent application EP-A 0278172 (CBP167). The head 21 of the bolt has a diameter less than that of the borehole 10 so as to define an annular clearance
Q measuring about 2 mm. In use, the bolt is urged upwardly with rotation through the two compartments A, B of the container 1 in succession towards the blind end of the borehole.As the bolt is advanced the walls of the container are torn up and the components of the self-setting composition from the lower compartment A released from their compartments 5,6 so starting the chemical interaction to form the permanent set load bearing annulus D; and the bolt enters the mass of granules and is rotated to compact the granules so that they slide over each other and interlock to form an adjustable load bearing annulus.
Tension is applied to the bolt, which compacts the granules further, shortening the height of the load bearing annulus C but increasing the load. The whole operation can take place in less than about 10 seconds. The permanent set load bearing annulus D increases in compressive strength with time as a result of the chemical reactions which take place. The cement in the compartment B is caused to set so as to become at least self cohesive by the water released from the resin formulation and/or by the moisture present in the borehole which is caused to migrate as a result of the exotherm (about 20Co or more) generated on setting of the self-setting composition. The step of dipping the first anchor means in water to set the cement powder therein has been avoided and the rate of bolting has been speeded up.The quickly formed point anchorage is secure because of the two load bearing annuli, i.e. interlocked aggregate C and set material D.
Example
A number of tubes were made of tea bag type material, each about 440 to 460 mm long. A capsule containing aggregate as defined in
Table I below optionally with 10% dry OPC cement in a paper skin about 220 mm long was pushed into each tube from one end. A capsule about 220 mm long and having a plastics skin containing unsaturated polyester resin and calcium carbonate filler in one compartment and a catalyst component in another was present at the other end. The ends of the filled tubes were clipped using metal clips to form containers. The containers were used to anchor bolts 14 mm in diameter with 28 mm diameter heads in 30 mm diameter test boreholes drilled in concrete. The bolts were then anchored as described and tensioned under a load within about ten seconds.The results obtained are shown in the Table which shows the load applied to tension the bolt and the extent of movement of the bolt as a result of the tensioning. These results show that under typical tensioning loads the extent of movement is limited.
A comparison of the results of tests 5 and 8 shows that increasing the particle size distribution decreases the amount of movement undergone for a given load. The container of test 11 comprised about 2/3 of aggregate and 1/3 of resin and the result shows that the resin plays little or no role in the point anchoring.
TABLE 1
Test Cement Load(T) Movement (mm) Comment 1. no 6 12 down hole, nut slipped 2. no 6 12 overhead hole 3. no 7.5 15 horizontal hole 4. no 8 18 downhole, two separate capsules 5. yes 6 18 capsule contained 90% andesite (3-6mm) and 10% OPC 6. yes 7.5 15 horizontal hole 7. yes 8 18 overhead hole 8. yes 6 17 capsule contained andesite (3-6mm) and andesite dust 9. yes 7 20 Dynagrip and andesite 10. yes 8 14 andesite dust 11. yes 8 16 andesite and Dynagrip* and resin *Dynagrip is a registered trade mark of EAC Limited
Claims (8)
- CLAIMS 1. A method of anchoring an element in a borehole therefor, the method comprising the steps of: a) placing in the boreholei) a first anchoring means adapted to form an adjustable load bearing annulus, andii) a second anchoring means settable to form a permanent load bearing annulus, b) advancing the element towards the blind end of the borehole to contact the second anchoring means to start the setting thereof and into contact with the first anchoring means, andc) tensioning the element with respect to the first anchoring means thereby to cause the first anchoring means to form an adjustable load bearing annulus.
- 2. A method according to Claim 1, wherein the first anchoring means comprises a mass of loose granular material of low aggregate crushing value and arranged so that tensioning of the element compacts the granular material and causes the granules to slide over each and interlock to form an adjustable load bearing annulus.
- 3. A method according to Claim 2, wherein the mass of loose granular material contains a hydraulically settable material.
- 4. A method according to any preceding Claims wherein each anchoring means is presented in a capsule and the two capsules are arranged in line in a common container.
- 5. A container for use in a method according to any preceding Claim, the container comprising a generally cylindrical body having two end portions, each defining a longitudinal compartment, one compartment of which contains a particulate mass comprising a granular material having few natural fracture planes and a dry hydraulically setting material to form an adjustable load bearing annulus and the other compartment contains the interactive components of a self setting composition to form a permanently set load bearing annulus.
- 6. A container according to Claim 5, wherein the granular material has a void volume in the uncompacted condition substantially the same as the volume of the anchor element to be anchored.
- 7. A container according to Claim 5 or 6, wherein the second anchoring means comprises 8 resin composition comprising an unsaturated polyester, epoxy or polyurethane system.
- 8. A container according to Claim 5,6 or 7 wherein the first anchoring means comprises a cementitious composition based on high alumina cement, blast furnace slag and retarder and accelerators so as to effect set or mixing.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9005377A GB2241759A (en) | 1990-03-09 | 1990-03-09 | Anchoring of bolts in boreholes |
| PCT/GB1991/000344 WO1991014080A2 (en) | 1990-03-09 | 1991-03-05 | Point anchoring |
| AU74605/91A AU7460591A (en) | 1990-03-09 | 1991-03-05 | Point anchoring |
| ZA911732A ZA911732B (en) | 1990-03-09 | 1991-03-08 | Point anchoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9005377A GB2241759A (en) | 1990-03-09 | 1990-03-09 | Anchoring of bolts in boreholes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9005377D0 GB9005377D0 (en) | 1990-05-02 |
| GB2241759A true GB2241759A (en) | 1991-09-11 |
Family
ID=10672359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9005377A Withdrawn GB2241759A (en) | 1990-03-09 | 1990-03-09 | Anchoring of bolts in boreholes |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU7460591A (en) |
| GB (1) | GB2241759A (en) |
| WO (1) | WO1991014080A2 (en) |
| ZA (1) | ZA911732B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4132625A1 (en) * | 1991-10-01 | 1993-04-08 | B & Btec Holding Ag | ADHESIVE CARTRIDGE FOR A COMPOSITE DOWEL AND METHOD FOR THEIR PRODUCTION |
| US6291555B1 (en) | 2000-07-26 | 2001-09-18 | Illinois Tool Works Inc | Highly viscous chemical anchoring adhesive |
| US6403678B1 (en) | 2000-07-26 | 2002-06-11 | Illinois Tool Works, Inc. | Rope of chemical anchoring adhesive |
| US6420458B1 (en) | 2000-07-26 | 2002-07-16 | Illinois Tool Works, Inc. | Solid amine-cured anchoring adhesive |
| US7226650B2 (en) | 2004-07-01 | 2007-06-05 | Illinois Tool Works Inc. | Wrapped highly viscous chemical anchoring adhesive |
| US7368170B2 (en) | 2004-07-01 | 2008-05-06 | Illinois Tool Works Inc. | Viscous chemical anchoring adhesive |
| EP2123921A1 (en) * | 2008-05-21 | 2009-11-25 | HILTI Aktiengesellschaft | Setting method for anchoring an attachment element |
| US7736738B2 (en) | 2003-12-17 | 2010-06-15 | Terrasimco Inc. | Coated mining bolt |
| WO2012144889A1 (en) * | 2011-04-19 | 2012-10-26 | Jaap Van Der Kamp | Plug |
| US8517641B2 (en) | 2009-07-21 | 2013-08-27 | Illinois Tool Works Inc. | Anchoring adhesive combination and integrated method of applying it |
| DE102012017704A1 (en) * | 2012-09-07 | 2014-03-13 | Dywidag-Systems International Gmbh | Arrangement for the high-strength anchoring of a tensioning rod having a tension member in a component and method for producing such an anchorage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB953056A (en) * | 1959-04-20 | 1964-03-25 | Bergwerksverband Gmbh | Improved method of securing a fixing element in a hole |
| GB1273604A (en) * | 1968-10-12 | 1972-05-10 | Alfons Harke | Improvements in or relating to the anchoring of attachment members in walls |
| US4193246A (en) * | 1977-07-21 | 1980-03-18 | Hilti Aktiengesellschaft | Clamping member for an adhesively secured anchor rod |
| US4413929A (en) * | 1979-12-18 | 1983-11-08 | Kubota, Ltd. | Rock bolt |
| US4514125A (en) * | 1982-03-19 | 1985-04-30 | Invocas, Inc. | Fastener improvement including introduction of selected capsule of adhesive into porous basket hung in bore for activation by fastener installation |
| EP0182039A1 (en) * | 1984-11-20 | 1986-05-28 | HILTI Aktiengesellschaft | Destructible anchor cartridge |
| EP0278172A1 (en) * | 1986-12-30 | 1988-08-17 | Fosroc International Limited | Anchoring |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1599918A (en) * | 1978-05-31 | 1981-10-07 | Exchem Holdings | Grouting cartridge for rock-bolting |
| US4353463A (en) * | 1979-08-16 | 1982-10-12 | Minnesota Mining And Manufacturing Company | Resin-containing cartridges and process for sealing solid structures or for anchoring bolts and rods therein |
| GB2115861B (en) * | 1982-03-04 | 1985-10-30 | Bryon Thomas Oulsnam | Roof bolts for mines and the like workings |
-
1990
- 1990-03-09 GB GB9005377A patent/GB2241759A/en not_active Withdrawn
-
1991
- 1991-03-05 AU AU74605/91A patent/AU7460591A/en not_active Withdrawn
- 1991-03-05 WO PCT/GB1991/000344 patent/WO1991014080A2/en unknown
- 1991-03-08 ZA ZA911732A patent/ZA911732B/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB953056A (en) * | 1959-04-20 | 1964-03-25 | Bergwerksverband Gmbh | Improved method of securing a fixing element in a hole |
| GB1273604A (en) * | 1968-10-12 | 1972-05-10 | Alfons Harke | Improvements in or relating to the anchoring of attachment members in walls |
| US4193246A (en) * | 1977-07-21 | 1980-03-18 | Hilti Aktiengesellschaft | Clamping member for an adhesively secured anchor rod |
| US4413929A (en) * | 1979-12-18 | 1983-11-08 | Kubota, Ltd. | Rock bolt |
| US4514125A (en) * | 1982-03-19 | 1985-04-30 | Invocas, Inc. | Fastener improvement including introduction of selected capsule of adhesive into porous basket hung in bore for activation by fastener installation |
| EP0182039A1 (en) * | 1984-11-20 | 1986-05-28 | HILTI Aktiengesellschaft | Destructible anchor cartridge |
| EP0278172A1 (en) * | 1986-12-30 | 1988-08-17 | Fosroc International Limited | Anchoring |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4132625A1 (en) * | 1991-10-01 | 1993-04-08 | B & Btec Holding Ag | ADHESIVE CARTRIDGE FOR A COMPOSITE DOWEL AND METHOD FOR THEIR PRODUCTION |
| US6291555B1 (en) | 2000-07-26 | 2001-09-18 | Illinois Tool Works Inc | Highly viscous chemical anchoring adhesive |
| US6403678B1 (en) | 2000-07-26 | 2002-06-11 | Illinois Tool Works, Inc. | Rope of chemical anchoring adhesive |
| US6420458B1 (en) | 2000-07-26 | 2002-07-16 | Illinois Tool Works, Inc. | Solid amine-cured anchoring adhesive |
| US8685303B2 (en) | 2003-12-17 | 2014-04-01 | Terrasimco Inc. | Coated mining bolt |
| US7736738B2 (en) | 2003-12-17 | 2010-06-15 | Terrasimco Inc. | Coated mining bolt |
| US7226650B2 (en) | 2004-07-01 | 2007-06-05 | Illinois Tool Works Inc. | Wrapped highly viscous chemical anchoring adhesive |
| US7368170B2 (en) | 2004-07-01 | 2008-05-06 | Illinois Tool Works Inc. | Viscous chemical anchoring adhesive |
| EP2123921A1 (en) * | 2008-05-21 | 2009-11-25 | HILTI Aktiengesellschaft | Setting method for anchoring an attachment element |
| US7785041B2 (en) | 2008-05-21 | 2010-08-31 | Hilti Aktiengesellschaft | Setting method for anchoring a fastening element |
| US8517641B2 (en) | 2009-07-21 | 2013-08-27 | Illinois Tool Works Inc. | Anchoring adhesive combination and integrated method of applying it |
| WO2012144889A1 (en) * | 2011-04-19 | 2012-10-26 | Jaap Van Der Kamp | Plug |
| DE102012017704A1 (en) * | 2012-09-07 | 2014-03-13 | Dywidag-Systems International Gmbh | Arrangement for the high-strength anchoring of a tensioning rod having a tension member in a component and method for producing such an anchorage |
| DE202013012224U1 (en) | 2012-09-07 | 2015-09-18 | Dywidag-Systems International Gmbh | Arrangement for the high-strength anchoring of a tensioning rod having a tension member in a component |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA911732B (en) | 1991-12-24 |
| AU7460591A (en) | 1991-10-10 |
| WO1991014080A3 (en) | 1991-10-31 |
| GB9005377D0 (en) | 1990-05-02 |
| WO1991014080A2 (en) | 1991-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |