WO2008019432A1 - A tensioning device - Google Patents
A tensioning device Download PDFInfo
- Publication number
- WO2008019432A1 WO2008019432A1 PCT/AU2007/001141 AU2007001141W WO2008019432A1 WO 2008019432 A1 WO2008019432 A1 WO 2008019432A1 AU 2007001141 W AU2007001141 W AU 2007001141W WO 2008019432 A1 WO2008019432 A1 WO 2008019432A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- barrel
- tensioning device
- tendon
- actuator
- cable
- Prior art date
Links
- 210000002435 tendon Anatomy 0.000 claims abstract description 53
- 238000009434 installation Methods 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 239000011440 grout Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- CCEKAJIANROZEO-UHFFFAOYSA-N sulfluramid Chemical class CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CCEKAJIANROZEO-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- 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
- E21D21/006—Anchoring-bolts made of cables or wires
Definitions
- the present invention relates broadly to a tensioning device for a strata support cable or tendon.
- Bolting In underground mining and strata control, bolting is generally recognised as the primary support system. Bolting involves grouting of a rock bolt within a bolt hole formed in the strata of an underground mine. The bolt is tensioned so that the strata surrounding the bolthole is held in compression.
- This technique has been extended to cables or tendons where a barrel and wedge fitting is attached to the cable and is tensioned using hydraulically actuated equipment.
- These prior art arrangements suffer from at least the following drawbacks: i) the tensioning of cables and tendons is time consuming because they comprise multiple stages and thus are expensive operations; ii) the cables and tendons require relatively large pulling rigs to achieve high tension loads; and iii) existing designs are large and very heavy to handle creating additional occupational health and safety hazards.
- a tensioning device for a strata support cable or tendon comprising: a barrel fitting being elongate and adapted to attach to the cable or tendon; a barrel actuator being movably connected to the barrel fitting for longitudinal movement relative to the barrel fitting; and locking means operatively coupled to the ban-el actuator for releasable engagement with the barrel fitting, or vice versa, to temporarily prevent at least longitudinal movement of said actuator relative to the barrel fitting whereby movement of the barrel actuator effects a corresponding movement of the barrel fitting and the cable or tendon for its placement in a cavity and thereafter release of the locking means from the barrel fitting, or the barrel actuator, permits longitudinal movement of the barrel actuator relative to the ban-el fitting for tensioning of the cable or tendon within the cavity.
- the barrel fitting is externally threaded and the barrel actuator includes a nut threadably attached to the barrel fitting.
- the barrel fitting is of a 2-piece construction including a barrel head connected to a threaded barrel section.
- the locking means is in the form of a mechanical arrangement or chemical means.
- the mechanical locking arrangement includes a pin or rod slidably located in a corresponding hole in the barrel actuator and being configured for engagement with a mating recess in the barrel fitting. More preferably the pin or rod is in the form of a shear pin designed to break or fracture at a predetermined load to then permit movement of the barrel actuator relative to the barrel fitting.
- the mechanical locking arrangement includes a variation in the configuration of the external thread of the barrel fitting.
- the tensioning device also comprises a strata plate having a central aperture through which the cable or tendon passes.
- the strata plate is in the form of a volcano plate or dome plate.
- the tensioning device further comprises a bearing assembly coupled to the barrel fitting to prevent relative rotational movement, the bearing assembly being arranged to locate intermediate the barrel actuator and the strata plate for abutment with the barrel actuator on tensioning of the cable or tendon.
- the bearing assembly includes a domed washer being configured to abut the strata plate and permit angular installation of the cable or tendon relative to said plate.
- the bearing assembly also includes a friction washer, friction bearing, or thrust bearing located between the movable actuator and the domed washer.
- the domed washer includes a roughened or soft exterior surface being designed to engage a corresponding surface in the strata plate to prevent rotational movement whilst permitting tilting of the domed washer relative to the strata plate to accommodate angular installation of the cable or tendon.
- the threaded barrel fitting includes an axially oriented groove along its external surface, the groove being configured to engage a key in the domed washer to prevent rotational movement whilst allowing relative longitudinal movement. More preferably the groove is one of a pair of grooves located on opposing sides of the barrel fitting.
- the tensioning device also comprises a wedge assembly having an aperture for receipt of the cable or tendon, the wedge assembly having a tapered outside surface configured for engagement with a corresponding inside surface of the barrel fitting for clamping about the cable or tendon. More preferably the wedge assembly is shaped in the form of a conical frustum and is of a split design.
- the cavity in which the cable or tendon is placed is a pre-drilled cavity.
- the strata support cable or tendon is to be understood to include wire rope or strand.
- Figure 1 is a side view of a tensioning device of a first embodiment of the present invention.
- Figure 2 is a side view of a tensioning device of a second embodiment of the present invention.
- first tensioning device 1 for a strata support cable or tendon 80.
- the tensioning device 1 comprises a barrel fitting 60 and a barrel actuator 50.
- the barrel fitting 60 is elongate and adapted to slide over the cable or tendon.
- the barrel fitting 60 is in this example externally threaded.
- the barrel actuator 50 is movably connected to the barrel fitting 60 for longitudinal movement relative to the barrel fitting 60.
- the tensioning device 1 also includes locking means 40 coupled to the barrel actuator 50 for releasable engagement with the barrel fitting 60 to temporarily prevent movement of the actuator 50 relative to the barrel fitting 60.
- the tensioning device 1 is designed such that movement or preferably rotation of the barrel actuator 50 effects a corresponding movement of the cable or tendon for its placement in a pre-drilled cavity in the strata to be supported. This rotation also facilitates mixing of pre- installed resin or grout (not shown). Thereafter, release of the locking means 40 from the barrel fitting 60 permits longitudinal movement of the barrel actuator 50 relative to the barrel fitting 60 for tensioning of the cable or tendon within the cavity.
- the locking means is a mechanical locking arrangement including a pin or rod 40 located in a corresponding hole in the barrel actuator 50.
- the pin or rod 40 is configured for engagement with a mating hole in the barrel fitting 60.
- the pin or rod 40 is in the form of a shear pin designed to break or fracture at a predetermined load to then permit longitudinal movement of the barrel actuator 50 relative to the barrel fitting 60.
- the locking means includes an adhesive, such as that sold under the LOCTITE brand, applied between the actuator 50 and the barrel fitting 60.
- the adhesive is designed to release at a certain torque load when the cable ⁇ 'r tendon is retarded from rotational movement by the pre-installed grout.
- the barrel actuator includes a nut 50 threaded to the barrel fitting 60.
- the nut 50 is threaded on its internal bore so that it engages the threaded barrel fitting 60 whereby rotation of the nut 50 effects longitudinal movement of the nut 50 relative to the barrel fitting 60.
- the nut 50 can be moved to a selected position for placement of the shear pin 40 in the aligned holes.
- the nut 50 is moved together with the barrel fitting 60 when the shear pin 40 engages the mating hole of the barrel fitting 60.
- the tensioning device 1 also comprises a strata or "volcano" plate 10 having a central aperture through which the cable or tendon passes.
- the plate 10 has an internal rim which generally defines the central aperture and diverges away from the strata, such as a roof, rib or floor.
- the internal rim may have a slot which is oriented transverse to the rim.
- the tensioning device 1 further comprises a bearing assembly which includes a domed washer 20 being configured to abut the strata plate 10 and permit angular installation of the cable or tendon relative to the plate 10.
- the bearing assembly also includes a generally flat friction washer or thrust bearing 30 and the dome washer 20 together being located between the barrel actuator 50 and the strata plate 20.
- the friction washer 30 functions as a barrier to prevent any sparks and ignition of combustible gases which may be generated by the friction between the barrel actuator 50 and the dome washer 20.
- the domed washer 20 may include a protrusion which would engage a corresponding slot in the strata plate 10 to prevent rotational movement whilst permitting tilting of the domed washer 20 relative to the plate 10 to accommodate angular installation of the cable or tendon.
- the threaded barrel fitting 60 is in cross-section asymmetric along an external portion of its length.
- the asymmetric portion is configured to engage the similarly configured domed washer 20 to prevent rotational movement whilst allowing relative longitudinal movement.
- the asymmetric portion in the present embodiment is at least in part defined by a flattened longitudinal section of the threaded barrel fitting 60.
- the flattened section is shaped complementary to a corresponding section of the domed washer 20.
- the tensioning device 1 also comprises a wedge assembly 70 having an aperture for receipt of the cable or tendon.
- the wedge assembly ⁇ 70 has a tapered outside surface configured for engagement with a corresponding inside surface of an enlarged portion of the barrel fitting 60 to allow for clamping about the cable or tendon.
- the wedge assembly 70 is shaped in the form of a conical frustum and is of a split design.
- the wedge assembly 70 of this example has three substantially identical components separated by longitudinal splits. This enables the interior of the aperture of the wedge assembly 70 to clamp firmly onto the cable or tendon. As the wedge assembly 70 is wedged longitudinally into the enlarged portion of the barrel fitting 60 it closes about the cable or tendon.
- a second tensioning device 2 for a strata support cable or tendon 800 there is a second tensioning device 2 for a strata support cable or tendon 800. Due to the similarities between the first and the second embodiments, only the differences between the tensioning devices are described. For ease of referencing, features which are shown in the second embodiment and are similar to those of the first embodiment are designated using similar numbering with an additional zero at the end.
- a strata or "volcano" plate 100 of the second tensioning device 2 no longer has a slot, which is present in the strata plate 10 of the first tensioning device 1. Instead, an internal rim of the strata plate 100 has a roughened or soft surface.
- a threaded barrel section of the second tensioning device 2 no longer has a flattened longitudinal section, which is present in the threaded barrel section of the first tensioning device 1. Instead, the threaded barrel section now has two key ways which are shaped complementary to corresponding surfaces of a dome washer 200 of the second tensioning device 2.
- the dome washer 200 no longer has a flattened surface, which is present in the dome washer 20 of the first tensioning device 1.
- the threaded barrel section 600no longer has a mating hole 40, which is present in the first tensioning device 1.
- the dome washer 200 no longer has a protrusion, which is present in the dome washer 20 of the first tensioning device 1. Instead, the dome washer 200 now has a roughened or soft surface that engages a corresponding surface of the internal rim of the strata plate 100. The roughened or soft surfaces provide a frictional force to prevent relative rotational movement between the strata plate 100 and the dome washer 200.
- the second tensioning device 2 may have a friction bearing 300, instead of a friction washer or thrust bearing 30, which is present in the first tensioning device 1.
- the friction bearing 300 consists of two sections separated by radially oriented roller bearings which provide a low friction rotating or sliding movement between the two sections.
- the second tensioning device 2 has a barrel head 650 which has all the features of the enlarged portion in the first tensioning device 1.
- the barrel head 650 is detachably connected to the threaded barrel section 600 to form a complete barrel fitting.
- a locking means or mechanical locking arrangement 400 such as a roll or shear pin is fitted to the barrel head 650 and engages a corresponding hole in a barrel actuator 500 of the second tensioning device.
- the hole in the barrel actuator or actuator nut 500 of the second tensioning device 2 is located differently to the hole in the barrel actuator 50 of the first tensioning device.
- a bearing assembly of the second tensioning device 2 comprises the dome washer 200 and the friction bearing 300.
- the actuator nut 500 is screwed onto the threaded barrel section 600 to a point where, on connecting the barrel head 650 with the threaded barrel section 600, the hole in the actuator 500 and the locking means 400 align and will engage.
- the barrel head 650 is connected with threaded barrel section 600 to form the complete barrel fitting, whilst the locking means 400 engages with the holes.
- the threaded section 600 may be chilled and then allowed to expand into a tight fit with the barrel head 650.
- the hole in the nut 50 is aligned with the mating hole in the barrel fitting and the shear pin 40 is then pressed into engagement with the aligned hole and mating hole.
- the strata support cable or tendon is at one end passed through the strata plate 10 and the bearing assembly into the barrel fitting 60 where it is clamped for attachment by the wedge assembly 70.
- a drive tool of a drill rig or other drive means such as a dolly, socket or spanner (not shown) is fitted to the actuator nut 50 for placement of the cable or tendon in a strata cavity.
- the cavity has using known techniques been pre-drilled and prepared with resin or grout.
- the cable or tendon is progressively driven into the cavity by rotation of the actuator nut 50 and barrel fitting 60 to which it is locked via the shear pin 40.
- the drill rig continues to exert a rotational force to the actuator nut 50.
- the hardened resin retards rotation of the cable or tendon and the shear pin 40 is designed to fracture or shear at a predetermined torsional force exerted by the drive means.
- the actuator nut 50 rotates along the thread of the barrel fitting 60 and the nut 50 abuts the bearing assembly.
- the drive means is then used to further rotate the actuator nut 50 relative to the barrel fitting 60 for tensioning of the cable or tendon within the strata cavity.
- the flattened section or key ways of the barrel fitting 60 engage with the corresponding surface of the domed washer 20 to prevent relative rotational movement between these components.
- the protrusion or roughened surface of the domed washer 20 in turn engages with the slot or roughened surface of the internal rim of the strata plate 10 to prevent relative movement between these components.
- This embodiment of the invention can provide cable or tendon loads of up to 20 tonne.
- the tension loads may vary depending on the specific configuration of the tensioning device where for example a barrel fitting having a relatively fine pitched thread is capable of achieving high loads.
- the loads may also vary depending on the drive means used where for example a torque multiplier will provide increased tension loads.
- the tensioning device has at least the following advantages over the admitted prior art: i) the placement and tensioning of the strata cable or tendon can be effected in a single operation; ii) the device is relatively light and thus easier to handle than existing designs; and iii) the device lends itself to a simpler installation without for example post- grouting.
- the locking means which engages the barrel fitting and actuator need not be limited to the mechanical or chemical types described but may take the form of a retractable latch or lock.
- the barrel actuator, roof plate and wedge assembly may take another form and shape.
- the actuator nut 50 may vary from that described and may for example be a castle- headed nut and retaining pin mechanism which eliminates the need for forming the hole in the nut.
- the present embodiment is, therefore, to be considered in all respects as illustrative and not restrictive.
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)
- Piles And Underground Anchors (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002660562A CA2660562A1 (en) | 2006-08-14 | 2007-08-14 | A tensioning device |
CN2007800304645A CN101506467B (en) | 2006-08-14 | 2007-08-14 | A tensioning device |
AU2007284067A AU2007284067B2 (en) | 2006-08-14 | 2007-08-14 | A tensioning device |
US12/377,601 US20100189515A1 (en) | 2006-08-14 | 2007-08-14 | tensoning device |
EP07784781.2A EP2052130A4 (en) | 2006-08-14 | 2007-08-14 | A tensioning device |
AU2008100948A AU2008100948B4 (en) | 2006-08-14 | 2008-09-25 | A tensioning device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006904411A AU2006904411A0 (en) | 2006-08-14 | A tensioning device | |
AU2006904411 | 2006-08-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008019432A1 true WO2008019432A1 (en) | 2008-02-21 |
Family
ID=39081825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2007/001141 WO2008019432A1 (en) | 2006-08-14 | 2007-08-14 | A tensioning device |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100189515A1 (en) |
EP (1) | EP2052130A4 (en) |
CN (1) | CN101506467B (en) |
AU (1) | AU2007284067B2 (en) |
CA (1) | CA2660562A1 (en) |
WO (1) | WO2008019432A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011026178A1 (en) * | 2009-09-01 | 2011-03-10 | Fci Holdings Delaware, Inc. | Tensioning device |
WO2017015677A1 (en) * | 2015-07-21 | 2017-01-26 | Ncm Innovations (Pty) Ltd | Radially expansible rock bolt |
US10677057B2 (en) | 2015-07-21 | 2020-06-09 | Ncm Innovations (Pty) Ltd | Pneumatic drill installed rock anchor |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100838978B1 (en) * | 2004-07-14 | 2008-06-17 | 차이니즈 아카데미 오브 애그리컬쳐럴 엔지니어링 | Equipment and method for dry ferment |
DE102010024352A1 (en) * | 2010-06-18 | 2011-12-22 | Firep Rebar Technology Gmbh | Improved tie rod made of fiber-reinforced plastic |
GB2531461B (en) * | 2011-01-26 | 2016-10-05 | Latchways Plc | Safety line anchor |
WO2013033760A1 (en) * | 2011-09-05 | 2013-03-14 | Dywidag-Systems International Pty Limited | A tensionable cable bolt assembly |
AU2014201857B2 (en) * | 2011-09-05 | 2016-05-05 | DSI Underground Australia Pty Limited | A tensionable cable bolt assembly |
DE102012206613A1 (en) | 2012-04-23 | 2013-10-24 | Hilti Aktiengesellschaft | Strand |
CN109838258A (en) * | 2017-11-28 | 2019-06-04 | 平安煤炭开采工程技术研究院有限责任公司 | Anchorage |
ZA201907183B (en) * | 2018-11-02 | 2023-09-27 | Epiroc Holdings South Africa Pty Ltd | Cable anchor with anti-spin coupler |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU4558296A (en) * | 1995-02-17 | 1996-08-29 | A. Noble & Son Limited | Cable bolt termination |
WO1998013580A1 (en) * | 1996-09-27 | 1998-04-02 | Amalgamated Reinforcing (Proprietary) Limited | A method of pre-stressing a tendon |
AU8939598A (en) * | 1997-10-24 | 1999-05-13 | Dywidag-Systems International Pty. Limited | Cable tensioning device |
US20030185632A1 (en) * | 2002-04-02 | 2003-10-02 | Seegmiller Ben L. | Cable bolt apparatus and method of installation for mines |
Family Cites Families (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3361460A (en) * | 1966-05-02 | 1968-01-02 | Gerhard Jansen | Clamp nut |
US4132080A (en) * | 1977-11-07 | 1979-01-02 | Stratabolt Corporation | Resin anchored rock or mine roof bolt anchor mechanism |
DE2903694A1 (en) * | 1979-01-31 | 1980-08-14 | Gebirgssicherung Gmbh | MOUNTAIN ANCHOR |
US4557631A (en) * | 1983-08-29 | 1985-12-10 | Donan Jr David C | Off-center rock bolt anchor and method |
US4601614A (en) * | 1984-02-22 | 1986-07-22 | Lane William L | Rockbolt |
US4595315A (en) * | 1984-05-30 | 1986-06-17 | Consolidated Metal Products, Inc. | Anchor bolt assembly |
US4607984A (en) * | 1984-09-25 | 1986-08-26 | Republic Corporation | Apparatus and method for mine application |
US4611954A (en) * | 1984-09-25 | 1986-09-16 | Republic Corporation | Apparatus and method for mine installations |
CA1244270A (en) * | 1985-08-01 | 1988-11-08 | Donald Gagnon | Friction washer for securing a wire mesh screening onto the protruding end of rock bolts |
US4678374A (en) * | 1985-12-13 | 1987-07-07 | Jennmar Corporation | Roof bolt with expansion shell and threaded nut |
US4679966A (en) * | 1985-12-13 | 1987-07-14 | Jennmar Corporation | Roof bolt apparatus with expansion shell and coupling |
US4984938A (en) * | 1988-08-25 | 1991-01-15 | H&S Machine & Supply Company, Inc. | Coated washer for an anchor bolt system |
ATE185610T1 (en) * | 1991-07-26 | 1999-10-15 | J J P Geotechnical Engineering | ROPE ANCHOR |
US5378087A (en) * | 1991-09-25 | 1995-01-03 | Locotos; Frank M. | Mine roof support apparatus and method |
GB2262970B (en) * | 1991-12-19 | 1995-02-15 | Bridon Plc | Flexible roof bolt |
AU663619B2 (en) * | 1992-09-16 | 1995-10-12 | Australian Coal Industry Research Laboratories Limited | Rock bolt |
CA2142894A1 (en) * | 1993-06-28 | 1995-01-05 | Jeffrey Robert Ferguson | Improvements in rock bolts |
US5544980A (en) * | 1994-04-11 | 1996-08-13 | Seegmiller; Ben L. | Anchor structure |
US5511909A (en) * | 1994-06-07 | 1996-04-30 | Jennmar Corporation | Cable bolt and method of use in supporting a rock formation |
AUPM617094A0 (en) * | 1994-06-09 | 1994-07-07 | Industrial Rollformers Pty Limited | Washer and support member for supporting a load |
US5525013A (en) * | 1994-10-31 | 1996-06-11 | Seegmiller; Ben L. | Cable bolt structure and related components |
US5785463A (en) * | 1996-01-11 | 1998-07-28 | Jennmar Corporation | Combination cable bolt system |
US5755065A (en) * | 1996-04-25 | 1998-05-26 | Sorkin; Felix L. | Method and apparatus for forming an anchorage of a post-tension system |
US6270290B1 (en) * | 1997-02-14 | 2001-08-07 | Jennmar Corporation | Tensionable cable bolt |
US5919006A (en) * | 1997-02-14 | 1999-07-06 | Jennmar Corporation | Tensionable cable bolt with mixing assembly |
CA2254302A1 (en) * | 1998-11-23 | 2000-05-23 | Donald G. Gagnon | An improved friction washer |
US6470636B1 (en) * | 2000-08-07 | 2002-10-29 | Dallas R. Rose | Detensioning apparatus for releasing a chuck on a prestressed strand |
US6742966B2 (en) * | 2001-01-12 | 2004-06-01 | James D. Cook | Expansion shell assembly |
ES2568765T3 (en) * | 2001-03-23 | 2016-05-04 | Samwoo Geotech. Co | Internal anchor for a tension element |
ZA200203688B (en) * | 2001-09-13 | 2003-11-10 | Minova Int Ltd | Roof bolts for use in mines, a method for their production and method for their installation. |
CN2502009Y (en) * | 2001-11-21 | 2002-07-24 | 邢台矿业(集团)有限责任公司东庞矿多经公司 | Rapid mounting flexible anchoring-bolt |
US20030219316A1 (en) * | 2002-02-19 | 2003-11-27 | Rataj Mieczyslaw Stanislaw | Rock bolt |
AUPS310702A0 (en) * | 2002-06-21 | 2002-07-11 | Industrial Rollformers Pty Limited | Rock bolting system |
US6935811B2 (en) * | 2002-11-13 | 2005-08-30 | Terrasimco Inc. | Frictional mining bolt |
AU2002953368A0 (en) * | 2002-12-16 | 2003-01-09 | Garford Pty Ltd | A yielding rock bolt |
CA2452271C (en) * | 2003-12-03 | 2007-03-13 | Stewart Mining Products Inc. | An improved apparatus for ground support |
US7179020B2 (en) * | 2003-12-08 | 2007-02-20 | Robertson Jr Roy Lee | Mine roof bolt anchoring system and method |
US6986623B2 (en) * | 2003-12-08 | 2006-01-17 | Robertson Jr Roy Lee | Method and apparatus for anchoring a mine roof bolt |
US20050158127A1 (en) * | 2004-01-21 | 2005-07-21 | Fergusson Jeffrey R. | Yielding strata bolt |
WO2005106201A1 (en) * | 2004-05-03 | 2005-11-10 | Peter Andrew Gray | Locking member, a nut break-out device and a nut break-out system containing same |
CA2470212A1 (en) * | 2004-06-30 | 2005-12-30 | Wilfred G. Morris | Dual mechanical and resin anchor bolt |
CA2530323C (en) * | 2004-12-20 | 2013-01-29 | Dywidag-Systems International Pty Limited | Rock bolt |
US7819388B2 (en) * | 2006-01-17 | 2010-10-26 | Mccallion James P | Tendon gripping device |
CA2543755C (en) * | 2006-04-18 | 2012-12-11 | Mansour Mining Inc. | Detachable anchor bolt mixing head for use in mine roof support systems and method of using same |
AU2006202175B2 (en) * | 2006-05-23 | 2012-02-02 | Applied Research Of Australia Pty Limited | Plastic Rock-Bolt or Dowel |
AU2007203409B2 (en) * | 2006-07-20 | 2009-10-22 | Fci Holdings Delaware, Inc. | Rock bolt |
US8052352B2 (en) * | 2007-04-02 | 2011-11-08 | Fci Holdings Delaware, Inc. | Mine support having a linearly moveable and/or pivoting end plate |
US7959379B2 (en) * | 2009-03-02 | 2011-06-14 | Robertson Jr Roy Lee | Bolt anchor |
-
2007
- 2007-08-14 WO PCT/AU2007/001141 patent/WO2008019432A1/en active Application Filing
- 2007-08-14 EP EP07784781.2A patent/EP2052130A4/en not_active Withdrawn
- 2007-08-14 CA CA002660562A patent/CA2660562A1/en not_active Abandoned
- 2007-08-14 CN CN2007800304645A patent/CN101506467B/en not_active Expired - Fee Related
- 2007-08-14 AU AU2007284067A patent/AU2007284067B2/en not_active Ceased
- 2007-08-14 US US12/377,601 patent/US20100189515A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU4558296A (en) * | 1995-02-17 | 1996-08-29 | A. Noble & Son Limited | Cable bolt termination |
WO1998013580A1 (en) * | 1996-09-27 | 1998-04-02 | Amalgamated Reinforcing (Proprietary) Limited | A method of pre-stressing a tendon |
AU8939598A (en) * | 1997-10-24 | 1999-05-13 | Dywidag-Systems International Pty. Limited | Cable tensioning device |
US20030185632A1 (en) * | 2002-04-02 | 2003-10-02 | Seegmiller Ben L. | Cable bolt apparatus and method of installation for mines |
Non-Patent Citations (1)
Title |
---|
See also references of EP2052130A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011026178A1 (en) * | 2009-09-01 | 2011-03-10 | Fci Holdings Delaware, Inc. | Tensioning device |
AU2010291863B2 (en) * | 2009-09-01 | 2015-04-30 | Fci Holdings Delaware, Inc. | Tensioning device |
WO2017015677A1 (en) * | 2015-07-21 | 2017-01-26 | Ncm Innovations (Pty) Ltd | Radially expansible rock bolt |
US10358921B2 (en) | 2015-07-21 | 2019-07-23 | Ncm Innovations (Pty) Ltd. | Radially expansible rock bolt |
US10677057B2 (en) | 2015-07-21 | 2020-06-09 | Ncm Innovations (Pty) Ltd | Pneumatic drill installed rock anchor |
Also Published As
Publication number | Publication date |
---|---|
AU2007284067B2 (en) | 2011-08-18 |
EP2052130A1 (en) | 2009-04-29 |
US20100189515A1 (en) | 2010-07-29 |
CN101506467B (en) | 2011-09-07 |
CA2660562A1 (en) | 2008-02-21 |
AU2007284067A1 (en) | 2008-02-21 |
EP2052130A4 (en) | 2015-03-18 |
CN101506467A (en) | 2009-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2007284067B2 (en) | A tensioning device | |
US7927044B2 (en) | Tensioning assembly for a cable bolt | |
AU2009201516B2 (en) | Tension assembly | |
GB2290119A (en) | Flexible rock bolt | |
CA2370819C (en) | Cable bolt with mixing delay device | |
GB2441018A (en) | Rock bolt and method of use | |
AU2011250727B2 (en) | A tensioning device | |
AU2008100948B4 (en) | A tensioning device | |
WO2008154683A1 (en) | Rock bolt tendon tensioning | |
US20100266345A1 (en) | Engagement head for tensioning assembly | |
AU2015345983B2 (en) | Drive assembly | |
AU2015261553B2 (en) | Tension assembly | |
ZA200902680B (en) | Tension assembly | |
AU2010291864B2 (en) | Rock bolt drive assembly | |
AU2017204341B2 (en) | Tensioning assembly for a cable bolt | |
AU2013101156B4 (en) | Dolly | |
AU2010291863B2 (en) | Tensioning device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780030464.5 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07784781 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007284067 Country of ref document: AU Ref document number: 2007784781 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2660562 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2007284067 Country of ref document: AU Date of ref document: 20070814 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: RU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12377601 Country of ref document: US |