US20070009330A1 - Mine roof cable bolt and method - Google Patents
Mine roof cable bolt and method Download PDFInfo
- Publication number
- US20070009330A1 US20070009330A1 US11/452,494 US45249406A US2007009330A1 US 20070009330 A1 US20070009330 A1 US 20070009330A1 US 45249406 A US45249406 A US 45249406A US 2007009330 A1 US2007009330 A1 US 2007009330A1
- Authority
- US
- United States
- Prior art keywords
- bolt
- cable
- head mechanism
- mine roof
- resin
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 45
- 229920005989 resin Polymers 0.000 claims abstract description 45
- 238000009987 spinning Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- E21D20/025—Grouting with organic components, e.g. resin
-
- 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 is related to a mine roof bolt. More specifically, the present invention is related to a mine roof bolt for use with resin that comprises a multi strand cable that is preferably spun in a first direction for mixing the resin and in a second direction opposite the first direction to tension the cable, although spinning in the same direction for mixing and tensioning can also be used.
- the present invention pertains to a mine roof bolt for use with resin.
- the bolt comprises a strand cable.
- the bolt comprises a head mechanism attached to the strand cable which allows the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- the present invention pertains to a mine roof bolt for use with resin.
- the bolt comprises a strand cable.
- the bolt comprises means for allowing the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- the present invention pertains to a method for placing a mine roof bolt in a mine roof.
- the method comprises the steps of placing a resin cartridge in a bore hole in the mine roof. There is the step of inserting the strand cable of the bolt into the borehole so it pierces the cartridge. There is the step of rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin. There is the step of rotating the head mechanism in a second direction opposite the first direction to tension the cable bolt in the mine roof.
- the present invention is a mine roof bolt for use in a bore hole of a mine with resin.
- the bolt comprises a strand cable.
- the bolt comprises a head mechanism attached to the strand cable.
- the head mechanism includes a hollow fixture made from hot rolled all thread bar threaded on the outside through which the cable extends and to which the cable is attached, and a nut threaded to the fixture.
- FIG. 1 is a schematic representation of a mine roof bolt of the present invention.
- FIG. 2 is a schematic representation of a bottom end of a mine roof bolt of the present invention.
- FIG. 3 is a schematic representation of an invention tool with a mine roof bolt of the present invention.
- FIGS. 1-3 there is shown a mine roof bolt for use with resin.
- the bolt comprises a strand cable.
- the bolt comprises a head mechanism attached to the strand cable which allows the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- the head mechanism includes a hollow fixture 4 threaded on the outside through which the cable extends and to which the cable is attached.
- the fixture is preferably made from hot rolled all thread bar, described in ASTM A615, incorporated by reference herein.
- the head mechanism preferably includes a nut 5 threaded to the fixture 4 .
- the fixture 4 has a bottom portion which is beveled internally.
- the head mechanism preferably includes wedges 7 which are disposed in the beveled portion to grip the cable.
- the fixture 4 has an upper end 15 which is swagged to the cable, although it does not have to be swagged.
- the head mechanism preferably includes a stop mechanism disposed between the end of the fixture 4 and the wedges 7 to prevent the nut 5 from coming off as the fixture 4 is spun backwards opposite of its threads to cause the cable to mix the resin.
- the present invention pertains to a mine roof bolt for use with resin.
- the bolt comprises a strand cable.
- the bolt comprises means for allowing the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- the allowing means is shown in FIGS. 1-3 .
- the present invention pertains to a method for placing a mine roof bolt in a mine roof.
- the method comprises the steps of placing a resin cartridge 3 in a bore hole in the mine roof. There is the step of inserting the strand cable of the bolt into the borehole so it pierces the cartridge. There is the step of rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin. There is the step of rotating the head mechanism in a second direction opposite the first direction to tension the cable bolt in the mine roof.
- the step of spinning the fixture 4 of the head mechanism in a direction opposite of threads on the fixture 4 preferably includes the step of preventing a nut 5 of the head mechanism from coming off with a stop mechanism of the head mechanism.
- the rotating in a second direction step includes the step of turning the nut 5 in the second direction after the resin has set to tension the bolt.
- the present invention includes a method to install a cable bolt with tension. It also has specific hardware (a stop washer 6 ) and the manner in which it is placed.
- the method preferably is to mix in one direction and tension in the opposite direction using a cable bolt.
- the present invention is a mine roof bolt for use in a bore hole of a mine with resin.
- the bolt comprises a strand cable.
- the bolt comprises a head mechanism attached to the strand cable.
- the head mechanism includes a hollow fixture made from hot rolled all thread bar threaded on the outside through which the cable extends and to which the cable is attached, and a nut threaded to the fixture.
- the fixture has a bottom portion which is beveled internally.
- the head mechanism preferably includes wedges which are disposed in the beveled portion to grip the cable.
- the present invention pertains to a method for placing a mine roof bolt in a mine roof.
- the method comprises the steps of placing a resin cartridge in a bore hole in the mine roof. There is the step of inserting the strand cable of the bolt into the borehole so it pierces the cartridge. There is the step of rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin. There is the step of stopping the rotation of the head mechanism. There is the step of rotating the head mechanism in the first direction to tension the cable bolt in the mine roof. Preferably, the stopping step lasts long enough for the mixed resin to set.
- the bolt has a stop washer 6 that prevents the nut 5 from coming off during mixing.
- This washer 6 is held in place by the action of the wedges 7 seating inside the end of the fixture 4 .
- the washer I.D. is the same or slightly larger than the diameter of the entrance to the fixture 4 . Since the wedges 7 are tapered and become larger than the entrance diameter and washer I.D., this interference fit holds the washer in place.
- a roof bolting machine attaches to the insertion tool to spin and tension the bolt, as shown in FIG. 3 .
- the stop mechanism is different, either by: 1) damaging the threads at the end; or, 2) by fixing a thin nut on the end of the threads the main nut is prevented from coming off during mixing in the opposite direction.
- a multi-strand cable 1 with any of several means of mixing resin 9 in a cartridge 3 attached to the leading end is inserted into a drilled hole 10 in the roof of a mine or tunnel containing the resin.
- the second or bottom end has a fixture 4 attached to the cable which is threaded on the outside and has a nut 5 threaded to it.
- a drilled out threaded rebar rod is used as a fixture 4 to hold the cable.
- These threads 35 on the rebar are manufactured during rolling of the rod in a steel mill versus cut or roll threading a round rod. Examples could be a Dywidag or SAS rod.
- These threads 35 of a hot rolled all thread bar are better than rolled or cut threads since they do not damage in rough handling in a mine.
- the threaded fixture 4 is hollow and accepts the strand cable 1 .
- the head mechanism could also be a casting made in a foundry.
- the bottom portion of the fixture 4 is beveled internally to accept wedges 7 which grip the swagged mechanically to the cable.
- a washer 6 (preferably round) is placed as a stop member between the end of the fixture 4 and the wedges 7 .
- the washer can be held by the wedges 7 as an interference fit (between wedges 7 and end of all thread bar-fixture 4 ), or can be attached to the end of the fixture 4 , such as welding to hold it on.
- the washer provides a flat surface 16 to contact the nut 5 face as a stop means. This may be held in several other means such as welding to the fixture 4 .
- a deep wall socket 13 is used to insert the bolt and spin the resin.
- the stop washer 6 prevents the nut 5 from coming off as the bolt is spun backwards (opposite of its threads) to mix the resin. After spinning backwards to mix resin, the bolt is held in place until the resin sets, then the nut 5 is turned the other direction to tension the bolt from the nut 5 to the resin anchorage zone.
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- 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)
Abstract
A mine roof bolt for use with resin including a strand cable. The bolt includes a head mechanism attached to the strand cable which preferably allows the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof; although mixing and tightening can occur in the same direction. A method for placing a mine roof bolt in a mine roof.
Description
- The present invention is related to a mine roof bolt. More specifically, the present invention is related to a mine roof bolt for use with resin that comprises a multi strand cable that is preferably spun in a first direction for mixing the resin and in a second direction opposite the first direction to tension the cable, although spinning in the same direction for mixing and tensioning can also be used.
- In regard to the prior art using rigid tension rebar bolts, the method to mix the resin was by turning in one direction to mix, then the opposite direction to tension the system. The prior art teaches several stop mechanisms which are different.
- U.S. Pat. No. 5,378,087—This patent has to do with straight insertion using a static mixer on top. No spinning or turning to mix resin.
- U.S. Pat. No. 6,039,509—This patent teaches a method for mixing by turning the cable, however, it doesn't say turning one way first to mix resin, then the opposite way to tension.
- U.S. Pat. Nos. 5,375,946 and 5,647,694—These patents mix and tension in one direction simultaneously. They are different in that they both use an expansion shell at the top of bolt.
- Previous Methods to Mix Resin Using Stiff Rebar Inclused:
-
- 1. Delay nuts—such as a dome nut, shear-pin nut, and a tab-nut which prevents the thread from moving through the nut during mixing, all of these had mixing and tensioning occurring with movement of the tensioning device in one direction.
- 2. McDowell System—uses mixing in one direction and then tensioning in the other direction. The means to prevent movement of the nut off the thread is by damaging the thread at the end of the bolt.
- 3. Jim Earl System—uses a one-half nut welded at the end of the threads of a rebar as a stop means during mixing backwards, similar to McDowell.
- The present invention pertains to a mine roof bolt for use with resin. The bolt comprises a strand cable. The bolt comprises a head mechanism attached to the strand cable which allows the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- The present invention pertains to a mine roof bolt for use with resin. The bolt comprises a strand cable. The bolt comprises means for allowing the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- The present invention pertains to a method for placing a mine roof bolt in a mine roof. The method comprises the steps of placing a resin cartridge in a bore hole in the mine roof. There is the step of inserting the strand cable of the bolt into the borehole so it pierces the cartridge. There is the step of rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin. There is the step of rotating the head mechanism in a second direction opposite the first direction to tension the cable bolt in the mine roof.
- The present invention is a mine roof bolt for use in a bore hole of a mine with resin. The bolt comprises a strand cable. The bolt comprises a head mechanism attached to the strand cable. The head mechanism includes a hollow fixture made from hot rolled all thread bar threaded on the outside through which the cable extends and to which the cable is attached, and a nut threaded to the fixture.
- In the accompanying drawings, the preferred embodiment of the invention and preferred methods of practicing the invention are illustrated in which:
-
FIG. 1 is a schematic representation of a mine roof bolt of the present invention. -
FIG. 2 is a schematic representation of a bottom end of a mine roof bolt of the present invention. -
FIG. 3 is a schematic representation of an invention tool with a mine roof bolt of the present invention. - Referring now to the drawings wherein like reference numerals refer to similar or identical parts throughout the several views, and more specifically to
FIGS. 1-3 thereof, there is shown a mine roof bolt for use with resin. The bolt comprises a strand cable. The bolt comprises a head mechanism attached to the strand cable which allows the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof. - Preferably, the head mechanism includes a
hollow fixture 4 threaded on the outside through which the cable extends and to which the cable is attached. The fixture is preferably made from hot rolled all thread bar, described in ASTM A615, incorporated by reference herein. The head mechanism preferably includes anut 5 threaded to thefixture 4. Preferably, thefixture 4 has a bottom portion which is beveled internally. - The head mechanism preferably includes
wedges 7 which are disposed in the beveled portion to grip the cable. Preferably, thefixture 4 has anupper end 15 which is swagged to the cable, although it does not have to be swagged. The head mechanism preferably includes a stop mechanism disposed between the end of thefixture 4 and thewedges 7 to prevent thenut 5 from coming off as thefixture 4 is spun backwards opposite of its threads to cause the cable to mix the resin. - The present invention pertains to a mine roof bolt for use with resin. The bolt comprises a strand cable. The bolt comprises means for allowing the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
- The allowing means is shown in
FIGS. 1-3 . - The present invention pertains to a method for placing a mine roof bolt in a mine roof. The method comprises the steps of placing a
resin cartridge 3 in a bore hole in the mine roof. There is the step of inserting the strand cable of the bolt into the borehole so it pierces the cartridge. There is the step of rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin. There is the step of rotating the head mechanism in a second direction opposite the first direction to tension the cable bolt in the mine roof. - Preferably, there is the step of spinning the
fixture 4 of the head mechanism in a direction opposite of threads on thefixture 4. The spinning step preferably includes the step of preventing anut 5 of the head mechanism from coming off with a stop mechanism of the head mechanism. Preferably, the rotating in a second direction step includes the step of turning thenut 5 in the second direction after the resin has set to tension the bolt. - The present invention includes a method to install a cable bolt with tension. It also has specific hardware (a stop washer 6) and the manner in which it is placed.
- The method preferably is to mix in one direction and tension in the opposite direction using a cable bolt.
- The present invention is a mine roof bolt for use in a bore hole of a mine with resin. The bolt comprises a strand cable. The bolt comprises a head mechanism attached to the strand cable. The head mechanism includes a hollow fixture made from hot rolled all thread bar threaded on the outside through which the cable extends and to which the cable is attached, and a nut threaded to the fixture.
- Preferably, the fixture has a bottom portion which is beveled internally. The head mechanism preferably includes wedges which are disposed in the beveled portion to grip the cable.
- The present invention pertains to a method for placing a mine roof bolt in a mine roof. The method comprises the steps of placing a resin cartridge in a bore hole in the mine roof. There is the step of inserting the strand cable of the bolt into the borehole so it pierces the cartridge. There is the step of rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin. There is the step of stopping the rotation of the head mechanism. There is the step of rotating the head mechanism in the first direction to tension the cable bolt in the mine roof. Preferably, the stopping step lasts long enough for the mixed resin to set.
- In the operation of the preferred embodiment, the bolt has a
stop washer 6 that prevents thenut 5 from coming off during mixing. Thiswasher 6 is held in place by the action of thewedges 7 seating inside the end of thefixture 4. The washer I.D. is the same or slightly larger than the diameter of the entrance to thefixture 4. Since thewedges 7 are tapered and become larger than the entrance diameter and washer I.D., this interference fit holds the washer in place. A roof bolting machine attaches to the insertion tool to spin and tension the bolt, as shown inFIG. 3 . - In the prior art, shown on rigid rebar, the stop mechanism is different, either by: 1) damaging the threads at the end; or, 2) by fixing a thin nut on the end of the threads the main nut is prevented from coming off during mixing in the opposite direction.
- A
multi-strand cable 1 with any of several means of mixingresin 9 in acartridge 3 attached to the leading end is inserted into a drilledhole 10 in the roof of a mine or tunnel containing the resin. The second or bottom end has afixture 4 attached to the cable which is threaded on the outside and has anut 5 threaded to it. A drilled out threaded rebar rod is used as afixture 4 to hold the cable. Thesethreads 35 on the rebar are manufactured during rolling of the rod in a steel mill versus cut or roll threading a round rod. Examples could be a Dywidag or SAS rod. Thesethreads 35 of a hot rolled all thread bar are better than rolled or cut threads since they do not damage in rough handling in a mine. The threadedfixture 4 is hollow and accepts thestrand cable 1. The head mechanism could also be a casting made in a foundry. - The bottom portion of the
fixture 4 is beveled internally to acceptwedges 7 which grip the swagged mechanically to the cable. A washer 6 (preferably round) is placed as a stop member between the end of thefixture 4 and thewedges 7. The washer can be held by thewedges 7 as an interference fit (betweenwedges 7 and end of all thread bar-fixture 4), or can be attached to the end of thefixture 4, such as welding to hold it on. The washer provides aflat surface 16 to contact thenut 5 face as a stop means. This may be held in several other means such as welding to thefixture 4. Adeep wall socket 13 is used to insert the bolt and spin the resin. Thestop washer 6 prevents thenut 5 from coming off as the bolt is spun backwards (opposite of its threads) to mix the resin. After spinning backwards to mix resin, the bolt is held in place until the resin sets, then thenut 5 is turned the other direction to tension the bolt from thenut 5 to the resin anchorage zone. - If it is desired to mix and tighten in the same direction, this can be accomplished for example by using U.S. Pat. No. 5,526,720, incorporated by reference herein, which features a spring loaded wrench to allow both mix spinning and tightening to occur in one direction. When mixing and tightening in the same direction, a stop mechanism does not have to be used.
- Although the invention has been described in detail in the foregoing embodiments for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be described by the following claims.
Claims (16)
1. A mine roof bolt for use in a bore hole of a mine with resin comprising:
a strand cable; and
a head mechanism attached to the strand cable which allows the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
2. A bolt as described in claim 1 wherein the head mechanism includes a hollow fixture threaded on the outside through which the cable extends and to which the cable is attached.
3. A bolt as described in claim 2 wherein the head mechanism includes a nut threaded to the fixture.
4. A bolt as described in claim 3 wherein the fixture has a bottom portion which is beveled internally.
5. A bolt as described in claim 4 wherein the head mechanism includes wedges which are disposed in the beveled portion to grip the cable.
6. A bolt as described in claim 5 wherein the fixture has an upper end which is swaged to the cable.
7. A bolt as described in claim 6 wherein the head mechanism includes a stop mechanism disposed between the end of the fixture and the wedges to prevent the nut from coming off as the fixture is spun backwards opposite of its threads to cause the cable to mix the resin.
8. A mine roof bolt for use with resin comprising:
a strand cable; and
means for allowing the strand cable to be turned in a first direction for mixing the resin and in a second direction opposite the first direction for tensioning the strand cable in the mine roof.
9. A method for placing a mine roof bolt in a mine roof comprising the steps of:
placing a resin cartridge in a bore hole in the mine roof;
inserting the strand cable of the bolt into the borehole so it pierces the cartridge;
rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin; and
rotating the head mechanism in a second direction opposite the first direction to tension the cable bolt in the mine roof.
10. A method as described in claim 9 including the step of spinning the fixture of the head mechanism in a direction opposite of threads on the fixture.
11. A method as described in claim 10 wherein the spinning step includes the step of preventing a nut of the head mechanism from coming off with a stop mechanism of the head mechanism.
12. A method as described in claim 11 wherein the rotating in a second direction step includes the step of turning the nut in the second direction after the resin has set to tension the bolt.
13. A mine roof bolt for use in a bore hole of a mine with resin comprising:
a strand cable; and
a head mechanism attached to the strand cable, the head mechanism includes a hollow fixture made from hot rolled all thread bar threaded on the outside through which the cable extends and to which the cable is attached, and a nut threaded to the fixture.
14. A bolt as described in claim 13 wherein the fixture has a bottom portion which is beveled internally.
15. A bolt as described in claim 14 wherein the head mechanism includes wedges which are disposed in the beveled portion to grip the cable.
16. A method for placing a mine roof bolt in a mine roof comprising the steps of:
placing a resin cartridge in a bore hole in the mine roof;
inserting the strand cable of the bolt into the bore hole so it pierces the cartridge;
rotating a head mechanism of the bolt attached to the strand cable in a first direction to rotate the strand cable and mix the resin;
stopping the rotation of the head mechanism; and
rotating the head mechanism in the first direction to tension the cable bolt in the mine roof.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/452,494 US20070009330A1 (en) | 2005-06-17 | 2006-06-14 | Mine roof cable bolt and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US69166405P | 2005-06-17 | 2005-06-17 | |
US11/452,494 US20070009330A1 (en) | 2005-06-17 | 2006-06-14 | Mine roof cable bolt and method |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070009330A1 true US20070009330A1 (en) | 2007-01-11 |
Family
ID=39343602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/452,494 Abandoned US20070009330A1 (en) | 2005-06-17 | 2006-06-14 | Mine roof cable bolt and method |
Country Status (2)
Country | Link |
---|---|
US (1) | US20070009330A1 (en) |
CA (1) | CA2550181A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008154683A1 (en) * | 2007-06-21 | 2008-12-24 | Industrial Roll Formers Pty Limited | Rock bolt tendon tensioning |
WO2012021588A3 (en) * | 2010-08-10 | 2012-04-05 | Fci Holdings Delaware, Inc. | Fully grouted cable bolt |
US20120163924A1 (en) * | 2009-03-10 | 2012-06-28 | Sandvik Intellectual Property Ab | Friction bolt |
US20130149042A1 (en) * | 2011-12-07 | 2013-06-13 | Johann Steyn | Rock bolt |
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US3077809A (en) * | 1958-05-28 | 1963-02-19 | British Ropes Ltd | Roof bolt with a flexible tension member and cup-shaped expansible securing means |
US4303354A (en) * | 1979-03-28 | 1981-12-01 | Peabody Coal Company | Mine roof bolting |
US5375946A (en) * | 1992-02-06 | 1994-12-27 | F. M. Locotos Equipment & Design Co. | Mine roof support apparatus and method |
US5511909A (en) * | 1994-06-07 | 1996-04-30 | Jennmar Corporation | Cable bolt and method of use in supporting a rock formation |
US5525013A (en) * | 1994-10-31 | 1996-06-11 | Seegmiller; Ben L. | Cable bolt structure and related components |
US5526720A (en) * | 1994-06-14 | 1996-06-18 | Locotos; Frank M. | Wrench device for mine roof bolts |
US5531545A (en) * | 1995-05-11 | 1996-07-02 | Seegmiller; Ben L. | Cable bolt structure and method |
US5586839A (en) * | 1994-09-06 | 1996-12-24 | Gillespie; Harvey D. | Yieldable cable bolt |
US5738466A (en) * | 1993-08-16 | 1998-04-14 | Bridon Plc | Ribbed flexible member for casting into an anchorage medium |
US6039509A (en) * | 1991-09-25 | 2000-03-21 | F. M. Locotos Equipment & Design Co. | Mine roof support apparatus and method |
US6402433B1 (en) * | 2000-07-25 | 2002-06-11 | H. Doug Gillespie | Tensionable mine roof bolt |
US6428243B1 (en) * | 1996-09-09 | 2002-08-06 | Quantax Pty Ltd | Cable bolt |
US6561721B2 (en) * | 2000-03-15 | 2003-05-13 | Mine Design Technologies Inc. | Cable bolt with a yielding fixture and method of forming the same |
US6612783B2 (en) * | 2001-02-09 | 2003-09-02 | Jennmar Corporation | Cable bolt with mixing delay device |
-
2006
- 2006-06-14 US US11/452,494 patent/US20070009330A1/en not_active Abandoned
- 2006-06-15 CA CA002550181A patent/CA2550181A1/en not_active Abandoned
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3077809A (en) * | 1958-05-28 | 1963-02-19 | British Ropes Ltd | Roof bolt with a flexible tension member and cup-shaped expansible securing means |
US4303354A (en) * | 1979-03-28 | 1981-12-01 | Peabody Coal Company | Mine roof bolting |
US6039509A (en) * | 1991-09-25 | 2000-03-21 | F. M. Locotos Equipment & Design Co. | Mine roof support apparatus and method |
US5647694A (en) * | 1992-02-06 | 1997-07-15 | F.M. Locotos Equipment & Design Co. | Mine roof support apparatus and method |
US5375946A (en) * | 1992-02-06 | 1994-12-27 | F. M. Locotos Equipment & Design Co. | Mine roof support apparatus and method |
US5738466A (en) * | 1993-08-16 | 1998-04-14 | Bridon Plc | Ribbed flexible member for casting into an anchorage medium |
US5511909A (en) * | 1994-06-07 | 1996-04-30 | Jennmar Corporation | Cable bolt and method of use in supporting a rock formation |
US5526720A (en) * | 1994-06-14 | 1996-06-18 | Locotos; Frank M. | Wrench device for mine roof bolts |
US5586839A (en) * | 1994-09-06 | 1996-12-24 | Gillespie; Harvey D. | Yieldable cable bolt |
US5525013A (en) * | 1994-10-31 | 1996-06-11 | Seegmiller; Ben L. | Cable bolt structure and related components |
US5531545A (en) * | 1995-05-11 | 1996-07-02 | Seegmiller; Ben L. | Cable bolt structure and method |
US6428243B1 (en) * | 1996-09-09 | 2002-08-06 | Quantax Pty Ltd | Cable bolt |
US6561721B2 (en) * | 2000-03-15 | 2003-05-13 | Mine Design Technologies Inc. | Cable bolt with a yielding fixture and method of forming the same |
US6402433B1 (en) * | 2000-07-25 | 2002-06-11 | H. Doug Gillespie | Tensionable mine roof bolt |
US6612783B2 (en) * | 2001-02-09 | 2003-09-02 | Jennmar Corporation | Cable bolt with mixing delay device |
Cited By (8)
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WO2008154683A1 (en) * | 2007-06-21 | 2008-12-24 | Industrial Roll Formers Pty Limited | Rock bolt tendon tensioning |
US20120163924A1 (en) * | 2009-03-10 | 2012-06-28 | Sandvik Intellectual Property Ab | Friction bolt |
US8714883B2 (en) * | 2009-03-10 | 2014-05-06 | Sandvik Intellectual Property Ab | Friction bolt |
WO2012021588A3 (en) * | 2010-08-10 | 2012-04-05 | Fci Holdings Delaware, Inc. | Fully grouted cable bolt |
CN103069109A (en) * | 2010-08-10 | 2013-04-24 | Fci特拉华控股有限公司 | Fully grouted cable bolt |
US8757934B2 (en) | 2010-08-10 | 2014-06-24 | Fci Holdings Delaware, Inc. | Fully grouted cable bolt |
US20130149042A1 (en) * | 2011-12-07 | 2013-06-13 | Johann Steyn | Rock bolt |
US8801336B2 (en) * | 2011-12-07 | 2014-08-12 | Rsc Mining (Pty) Ltd. | Rock bolt |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: F.M. LOCOTOS CO., INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LOCOTOS, FRANK M.;REEL/FRAME:018275/0957 Effective date: 20060728 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |