SE1551687A1 - Friction bolt assembly - Google Patents
Friction bolt assembly Download PDFInfo
- Publication number
- SE1551687A1 SE1551687A1 SE1551687A SE1551687A SE1551687A1 SE 1551687 A1 SE1551687 A1 SE 1551687A1 SE 1551687 A SE1551687 A SE 1551687A SE 1551687 A SE1551687 A SE 1551687A SE 1551687 A1 SE1551687 A1 SE 1551687A1
- Authority
- SE
- Sweden
- Prior art keywords
- friction bolt
- rod
- bolt body
- expansion element
- drive head
- Prior art date
Links
- 239000011435 rock Substances 0.000 claims description 33
- 238000012546 transfer Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 34
- 238000004873 anchoring Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000000007 visual effect Effects 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
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
- F16B13/0858—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with an expansible sleeve or dowel body driven against a tapered or spherical expander plug
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Dowels (AREA)
Description
Summary of lnvention
[0005] In a first aspect the present invention provides a friction bolt assembly comprising:
a generally tubular friction bolt body longitudinally extending between a friction bolt
body leading end and a friction bolt body trailing end, said friction bolt body de?ning a cavity
longitudinally extending through said friction bolt body and having a split longitudinally
extending along said friction bolt body to said friction bolt body leading end;
a rod longitudinally extending through said cavity between a rod leading end and a rod
trailing end;
an expansion element mounted on, or integrally formed with, said rod and protruding
through said friction bolt body leading end, said expansion element having an engagement
surface tapering toward said rod trailing end; and
a drive head mounted on, or integrally formed with, said rod at or adjacent said rod
trailing end, said rod being actuatable by rotation of said drive head to draw said expansion
element toward said friction bolt body trailing end such that said engagement surface engages
said friction bolt body at said friction bolt body leading end, radially outwardly deforming said
friction bolt body at said friction bolt body leading end;
wherein said friction bolt assembly further comprises means for at least substantially
preventing rotation of said expansion element relative to said friction bolt body.
[0006] In one or more embodiments, said expansion element is located at or adjacent said rod
leading end.
[0007] In one or more embodiments, said means comprises a surface feature of said expansion
element configured to engage said friction bolt body. In one embodiment, said surface feature
comprises a key proj ecting from said engagement surface into said split.
[0008] In one or more embodiment, said expansion element is located at or adjacent said rod
leading end.
[0009] In an altemative embodiment, said means comprises one or more welds fixing said
expansion element to said friction bolt body, said one or more welds being con?gured to fail
upon application of a predeterrnined load tending to draw said expansion element toward said
friction bolt body trailing end.
[0010] In one or more embodiments, said drive head is threadingly mounted on a threaded
trailing portion of said rod such that, upon actuation of said rod by rotation of said drive head,
said threaded trailing portion of said rod is drawn through said drive head. In one embodiment,
said expansion element remains fixed in relation to said rod during said actuation of said rod. In
another embodiment, said expansion element is threadingly mounted on a threaded leading
portion of said rod, said threaded leading portion and said threaded trailing portion of said rod
being like-handed.
[0011] In one or more embodiments, said expansion element is threadingly mounted on a
threaded leading portion of said rod such that, upon actuation of said rod by rotation of said drive
head, said rod rotates With said drive head, drawing said expansion element along said threaded
leading portion of said rod. In one embodiment, said drive head remains fixed in relation to said
rod during said actuation.
[0012] Typically, said friction bolt assembly further comprises a load transfer ?tting mounted on
said rod between said drive head and said friction bolt body trailing end, said load transfer fitting
having a pro?led leading face configured to engage and support said friction bolt body trailing
end.
[0013] In a second aspect the present invention provides a friction bolt assembly comprising:
a generally tubular friction bolt body longitudinally extending between a friction bolt
body leading end and a friction bolt body trailing end, said friction bolt body defining a cavity
longitudinally extending through said friction bolt body and having a split longitudinally
extending along said friction bolt body to said friction bolt body leading end;
a rod longitudinally extending through said cavity between a rod leading end and a rod
trailing end;
an expansion element mounted on, or integrally formed with, said rod and protruding
through said friction bolt body leading end, said expansion element having an engagement
surface tapering toward said rod trailing end; and
a drive head mounted on, or integrally formed with, said rod at or adjacent said rod
trailing end, said rod being actuatable by rotation of said drive head to draw said expansion
element toward said friction bolt body trailing end such that said engagement surface engages
said friction bolt body at said friction bolt body leading end, radially outwardly deforming said
friction bolt body at said friction bolt body leading end;
Wherein said friction bolt body has a tapered leading portion tapering to said friction bolt
body leading end, the maximum diameter of said engagement surface being greater than the
internal diameter of said friction bolt body at said friction bolt body leading end and less than the
maximum diameter of said friction bolt body.
[0014] In one or more embodiments, said expansion element is located at or adj acent said rod
leading end.
[0015] In one or more embodiments, said drive head is threadingly mounted on a threaded
trailing portion of said rod such that, upon actuation of said rod by rotation of said drive head,
said threaded trailing portion of said rod is draWn through said drive head. In one embodiment,
said expansion element remains fixed in relation to said rod during said actuation of said rod. In
another embodiment, said expansion element is threadingly mounted on a threaded leading
portion of said rod, said threaded leading portion and said threaded trailing portion of said rod
being like-handed.
[0016] In one or more embodiments, said expansion element is threadingly mounted on a
threaded leading portion of said rod such that, upon actuation of said rod by rotation of said drive
head, said rod rotates With said drive head, drawing said expansion element along said threaded
leading portion of said rod. In one embodiment, said drive head remains fixed in relation to said
rod during said actuation.
[0017] Typically, said friction bolt assembly further comprises a load transfer ?tting mounted on
said rod between said drive head and said friction bolt body trailing end, said load transfer ?tting
having a pro?led leading face con?gured to engage and support said friction bolt body trailing
end.
[0018] In a third aspect the present invention provides a method of installing any of the friction
bolt assemblies defined above, comprising the steps of:
drilling a bore hole into a rock face of a rock strata to be stabilized, said bore hole having
a diameter greater than the maximum diameter of said expansion element and less than the
maximum diameter of said friction bolt body;
inserting said friction bolt assembly into said bore hole With said expansion element
leading;
applying percussive force to said friction bolt body to drive said friction bolt body into
said bore hole With an interference fit;
rotating said drive head to actuate said rod, drawing said expansion element towards said
friction bolt body trailing end and engaging said engagement surface With said friction bolt body
at said friction bolt leading end thereby outWardly radially deforming said friction bolt body at
said friction bolt body leading end into bearing engagement With the Wall of said bore hole.
Brief Description of Drawings
[0019] Preferred embodiments of the present invention will now be described, by Way of
example only, With reference to the accompanying drawings Wherein:
[0020] Figure. l is a front elevation view of a friction bolt assembly according to a first
embodiment;
[0021] Figure 2 is side elevation view of the friction bolt assembly of Figure l;
[0022] Figure 3 is cross-sectional view of the friction bolt assembly of Figure l, taken at section
3-3 ofFigure 2;
[0023] Figure 4 is an enlarged view of detail A of Figure 3;
[0024] Figure 5 is an enlarged view of detail B of Figure 3;
[0025] Figure 6 is a fragmentary isometric View of the leading portion of the friction bolt
assembly of Figure l;
[0026] Figure 7 is an isometric View of the expansion element of the friction bolt assembly of
Figure 1;
[0027] Figure 8 is a fragmentary isometric view of the trailing portion of the friction bolt
assembly of Figure l;
[0028] Figure 9 is a cross-sectional view of a partially completed installation of the rock bolt
assembly of Figure 1;
[0029] Figure 10 is a cross-sectional view of the completed installation of Figure 9;
[0030] Figure 11 is a front elevation view of a friction bolt assembly according to a second
embodiment;
[0031] Figure 12 is a fragmentary isometric view of the leading portion of the friction bolt
assembly of Figure 11;
[0032] Figure 13 is a front elevation View of a friction bolt assembly according to a third
embodiment;
[0033] Figure 14 is a side elevation view of the friction bolt assembly of Figure 13;
[0034] Figure 15 is a cross-sectional View of the friction bolt assembly of Figure 13, taken at
section 15-15 ofFigure 14;
[0035] Figure 16 is an enlarged view of detail A of Figure 15;
[0036] Figure 17 is an enlarged View of detail B of Figure 15;
[0037] Figure 18 is a cross-sectional View of a partially completed installation of the friction bolt
assembly of Figure 13;
[0038] Figure 19 is a cross-sectional view of the completed installation of Figure 18;
[0039] Figure 20 is a front elevation View of a friction bolt assembly according to a fourth
embodiment;
[0040] Figure 21 is a partially cross-sectioned view of the friction bolt assembly of Figure 20;
[0041] Figure 22 is an enlarged View of detail A of Figure 21; and
[0042] Figure 23 is an enlarged view of detail B of Figure 21.
[0043] Figure 24 is a front elevation view of a friction bolt assembly according to a fifth
embodiment;
[0044] Figure 25 is a side elevation view of the friction bolt assembly of Figure 24;
[0045] Figure 26 is a cross-sectional view of the friction bolt assembly of Figure 24, taken at
section 26-26 of Figure 25;
[0046] Figure 27 is an enlarged view of detail A of Figure 26;
[0047] Figure 28 is an enlarged view of detail B of Figure 26;
[0048] Figure 29 is an isometric view of a friction bolt assembly according to a sixth
embodiment;
[0049] Figure 30 is an enlarged cross-sectional view of the trailing end region of the friction bolt
assembly of Figure 29; and
[0050] Figure 31 is a cross-sectional view of an installation of the friction bolt assembly of
Figure 29 following a rock burst or seismic event.
Description of Embodiments
[0051] A friction bolt assembly 100 according to a first embodiment is depicted in Figures 1 to 8
of the accompanying drawings. The friction bolt assembly 100 has a generally tubular friction
bolt body 110 that longitudinally extends between a friction bolt body leading end 111 and a
friction bolt body trailing end 112. The friction bolt body 110 defines a cavity 113
longitudinally extending through the friction bolt body 110. The friction bolt body 110 has a
split 114 extending along the friction bolt body 110 to the friction bolt body leading end 111 to
allow for radial compression of the friction bolt body 110 in the usual manner. Here the split
114 extends along the full length of the friction bolt body 110 from the friction bolt body trailing
end 112. The friction bolt body 110 has a tapered leading portion 115 that tapers toward the
friction bolt body leading end 111 in the usual manner to enable the friction bolt body 110 to be
driven into a bore hole having a smaller diameter than the constant diameter of the primary
portion 116 of the friction bolt body 110. A collar 117, in the general form of a torus, is welded
to the friction bolt body 110 adjacent the friction bolt body trailing end 112. In one embodiment,
the external diameter of the primary portion 116 of the friction bolt body 110, being the
maximum diameter of the friction bolt body 110, is approximately 47 mm, whilst the cross-
section of the leading portion 115 of the friction bolt body 110 at the friction bolt body leading
end 111 is of a reduced cross-sectional area, being the minimum cross-sectional area of the
friction bolt body 110. In one embodiment, the cross-section of the leading portion 115 at the
friction bolt body leading end 111 is of an oval configuration having a major axis (maximum)
diameter of 40 mm and minor axis diameter of 26 mm, although it is also envisaged that the
leading portion 115 at the friction bolt leading 111 may be generally circular. The wall thickness
of the friction bolt body 110 is here approximately 3 mm. The friction bolt body 110 is typically
formed of structural grade steel.
[0052] The friction bolt assembly 100 further includes an elongate rod 120 longitudinally
extending through the cavity 113 in the friction bolt body 110 between a rod leading end 121 and
a rod trailing end 122. The rod 120 is typically formed of rigid steel bar. An expansion element
130 is mounted on the rod 120. The expansion element 130 is typically located toward the rod
leading end 121 and in the embodiment depicted the expansion element 130 is located at or
adjacent the rod leading end 121. As best shown in Figures 3 and 4, in the embodiment depicted,
the expansion element 130 is threadingly mounted onto a threaded leading portion 123 of the rod
120. The threaded leading portion 123 of the rod 120 is received within a blind aperture 133
extending through the expansion element trailing end 132. It is also envisaged, however, that the
expansion element 130 may be mounted on the rod 120 by altemate means, such as welding, or
may altematively be integrally formed with the rod 120. The expansion element 130 is in the
general form of a body of revolution having a frusto-conical tapered leading surface 134
extending and tapering to a closed expansion element leading end 131, a generally cylindrical
mid-surface 135 trailing the leading surface 134 and defining the maximum diameter of the
expansion element 130 and a trailing generally frusto-conical engagement surface 136 that
tapers, here in a non-linear manner, from the mid-surface 135 to the expansion element trailing
end 132. Here the engagement surface 136 has a slightly concave form. In the embodiment
depicted, the maximum diameter of the expansion element 130, de?ned by the mid-surface 135,
is approximately 43mm. This is greater than the internal diameter of the friction bolt body 1 10
at the friction bolt body leading end 111 and less than the maximum diameter of the friction bolt
body 1 10.
[0053] As best depicted in Figures 6 and 7, the expansion element 130 may further comprise
means, for at least substantially preventing rotation of the expansion element 130 relative to the
friction bolt body 110. In the first embodiment, the means is in the form of a surface feature of
the expansion element 130, particularly in the form of a key 137. The key 137 projects from,
and is integrally formed with, the engagement surface 136 and extends from the expansion
element trailing end 132 to the mid-surface 135. As shown in Figures 1 and 6, the key 137
projects into the split 114 formed in the friction bolt body 110. As a result, rotation of the rod
120, which would tend to rotate the expansion element 130, results in the key 137 engaging an
edge of the friction bolt body 110 bounding the split 114, preventing relative rotation, at least
beyond minor movement associated with the free play of the key 137 within the slightly broader
width of the split 114 at the friction bolt leading end 111.
[0054] The friction bolt assembly 100 further comprises a drive head 140 mounted on the rod
120 at or adj acent the rod trailing 122. In the particular embodiment depicted, the drive head
140 is in the form of an open hexagonal nut that is threadingly mounted on a threaded trailing
portion 124 of the rod 120. A sacrificial plastic sheathing may cover the exposed region of the
threaded trailing portion 124 so as to avoid the thread of the threaded trailing portion 124 being
fouled by debris during transport and handling in the mine. Between the drive head 140 and the
friction bolt body trailing end 112, a Washer 150 and load transfer ?tting 160 are mounted on the
threaded trailing portion 124 of the rod 120. The load transfer fitting 160 has a pro?led leading
face 161 configured to engage and support the friction bolt body trailing end 112 and collar 117
to transfer percussive loads applied during installation, as will be discussed ?arther below, to the
friction bolt body 110 without locally damaging the friction bolt body 110.
[0055] Installation of the friction bolt assembly 100 will now be described with reference to
Figures 9 and 10. Firstly, a bore hole 10 is drilled into the rock face 12 of a rock strata 11 to be
stabilized. In the embodiment depicted, the bore hole 210 is drilled with a standard installation
rig with a drill bit having a diameter typically of 43 to 44mm, Which will typically result in a
bore hole diameter of 43 to 45mm, depending on strata type and hardness. Accordingly, the
maximum diameter of the friction bolt body 110 (being approximately 47mm in a preferred
embodiment) is slightly greater than the diameter of the bore hole 10, so as to provide for an
interference fit in the usual manner, Whilst the maximum diameter of the expansion element 130,
here being approximately 43mm, is less than the maximum diameter of the friction bolt body
10
110 and slightly less than the diameter of the bore hole 10 such that the expansion element 130
may be readily inserted into the bore hole 10.
[0056] Before inserting the friction bolt assembly 100 into the bore hole 10, a plate washer 170
(and optionally a ball Washer) is mounted on the friction bolt body 110 adjacent the collar 117
and the friction bolt assembly 100 is mounted on the installation rig, particularly with the drive
head 140 being received within a mating socket of the installation rig. The installation rig then
drives the friction bolt assembly 100 into the bore hole 10, applying percussive force via the load
transfer ?tting 160 until the plate Washer 170 is firmly engaged with the rock face 12. The
frictional forces due to the interference ?t between the friction bolt body 110 and bore hole wall
13 retain the friction bolt assembly 100 in the bore hole 10, and allow for the transfer of loads
between the rock strata 11 and the friction bolt body 110.
[005 7] Additional anchoring of the friction bolt body 110 in the bore hole 10 is achieved by way
of the expansion element 130, which provides a point anchoring effect. This is achieved by
actuating the rod 120 by rotating the drive head 140. Specifically, the drive head 140 is driven in
a direction tending to advance the drive head 140 along the threaded trailing portion 124 of the
rod 120 (here in an anti-clockwise direction). The threaded leading portion 123 of the rod 120 is
provided with a like-handed thread (i.e., a thread having an identical orientation) to that of the
threaded trailing portion 124, such that rotational driving of the drive head 140 does not tend to
rotate the rod 120 in a direction that would withdraw the leading portion 123 of the rod 120 from
the recess 133 in the expansion element 130.
[0058] Rotation of the rod 120 and the expansion element 130 is substantially prevented by
virtue of the key 137 in the manner described above. Rotation of the drive head 140 accordingly
draws the threaded trailing portion 124 of the rod 120 through the drive head 140 and also draws
the expansion element 130 toward the friction bolt body trailing end 112, into the cavity 113.
The engagement surface 136 of the expansion element 130 accordingly engages the friction bolt
body 110 at the friction bolt body leading end 111 and radially outwardly deforms the friction
bolt body 110 at the friction bolt body leading end 111 as shown in Figure 10. In particular, the
expansion element 130 is drawn ?ally into the tapered leading portion 115 of the friction bolt
body 110, which is radially outwardly deformed by both the engagement surface 136 and mid-
surface 135 of the expansion element 130, bearing the leading portion 115 of the friction bolt
11
body 110 against the bore hole 10, thereby point anchoring the friction bolt body 110 Within the
bore hole 10.
[005 9] As can be seen in Figure 10, following installation and setting of the expansion element
130, the threaded trailing portion 124 of the rod 120 protrudes beyond the drive head 140. This
allows installation of a roof mesh against the rock face 12, secured by a lírrther plate washer and
nut in the usual manner.
[0060] A friction bolt assembly 200 according to a second embodiment is depicted in Figures 11
and 12 of the accompanying drawings. Features of the friction bolt assembly 200 that are
identical to those of the friction bolt assembly 100 of the first embodiment are provided with
identical reference numerals, whilst equivalent or alternate features of the friction bolt assembly
200 are provided with reference numerals equivalent to those of the friction bolt assembly 100 of
the first embodiment, incremented by 100.
[0061] The friction bolt assembly 200 is identical to the friction bolt assembly 100, apart from
the means provided for at least substantially preventing rotation of the expansion element 230
relative to the friction bolt body 110. Specifically, as an alternative to the key 137 of the friction
bolt assembly 100 of the first embodiment, the expansion element 230 is fixed to the friction bolt
body 110 by Way of one or more tack Welds 237. Specifically, the tack Welds 237 fix the
engagement surface 136 directly to the friction bolt body leading end 111. The welds 237 ensure
that the expansion element 130 is retained in an engaged relationship with the friction bolt
leading end 111 during transport and handling.
[0062] The friction bolt assembly 200 is installed in the same manner as the friction bolt
assembly 100 of the first embodiment as described above. Upon application of torque to the
drive head 140 during installation, the rod 120 and expansion element 230 are initially prevented
from rotating relative to the friction bolt body 110 by virtue of the welds 237. As the trailing end
portion 124 of the rod 120 is drawn through the drive head 140, tension in the rod 120 and
accordingly the load acting on the Welds 237, increases until the welds 237 fail. By the time the
welds 237 fail, however, the tension developed in the rod 120 will be sufficient to provide a firrn
engagement of the tapered engagement surface 136 of the expansion element 130 with the
friction bolt body leading end 111, sufficient to prevent rotation of the expansion element 130 as
the drive head 140 is further rotationally driven. Accordingly, as with the key 137 of the friction
12
bolt assembly 100 of the first embodiment, assurance is given to the operator that the expansion
element 130 is engaging and radially expanding friction bolt body 110, rather than merely freely
rotating as the drive head 140 is driven.
[0063] A friction bolt assembly 300 according to a third embodiment is depicted in Figures 13 to
17. Again, features of the friction bolt assembly 300 that are identical to those of the friction
bolt assembly 100 of the ?rst embodiment are provided With identical reference numerals, Whilst
equivalent or altemate features are provided With equivalent reference numerals, incremented by
200.
[0064] The friction bolt assembly 300 is similar to the friction bolt assembly 100 of the ?rst
embodiment, except that, rather than having a drive head 140 threadingly mounted on a rod 120,
and expansion element 130 effectively fixed in relation the rod 120, in the friction bolt assembly
300 the drive head 340 is fixed in relation to the rod 320 Whilst the expansion element 330 is
threadingly mounted on the rod 330. The friction bolt body 110 of the friction bolt assembly 300
is identical to that of the friction bolt assembly 100.
[0065] The expansion element 330 is identical to the expansion element 130 of the friction bolt
assembly 100 of the ?rst embodiment, except that the threaded aperture 333 extends through the
full length of the expansion element 330 through the expansion element leading end 331. The
threaded leading portion 323 of the rod 320 is of an increased length to provide for displacement
of the threaded leading portion 323 through the expansion element 330 during installation, as
Will be described below. A sacri?cial plastic sheathing may cover the exposed region of the
threaded leading portion 323 so as to avoid the thread of the threaded leading portion 323 being
fouled by debris during transport and handling in the mine.
[0066] The drive head 340 is in the form of a blind hexagonal nut that is threadingly mounted on
a shorter threaded trailing portion 324 of the rod 320. The drive head 340 is mounted on the
threaded trailing portion 324 of the rod 320 in a manner that results in the trailing portion 324 of
the rod 320 engaging the blind end of the drive head 340 during driving of the drive head 340
during installation, such that the drive head 340 effectively remains fixed in relation to the rod
320. In altemate forms, the drive head 340 may be mounted on the rod 320 by altemate means,
such as Welding, or may altematively be integrally formed With the rod 320.
13
[0067] As with the friction bolt assembly 100 of the first embodiment, a washer 150 and load
transfer fitting 160 are mounted on the rod 320 between the drive head 340 and the friction bolt
body trailing end 112.
[0068] Installation of the friction bolt assembly 300 will now be described with reference to
Figures 19 and 20. A bore hole 10 is first drilled into the rock face 12 of the rock strata 11 to be
stabilized, in the same manner as described above in relation to the first embodiment. The
friction bolt assembly 300 is then installed into the bore hole 10 utilizing an installation rig in the
same general manner as described above, ?rstly applying percussive force by the drive head 340
to drive the friction bolt assembly 300 into the bore hole 10 until the plate washer 170 is firmly
engaged with the rock face 12.
[0069] Additional anchoring of the friction bolt body 110 in the bore hole 10 is then again
achieved by way of the expansion element 330 by actuating the rod 320 by rotating the drive
head 340. Rotation of the drive head 340 rotates the rod 320. Rotation of the expansion element
330 is again at least substantially prevented by way of the key 137 (or altematively by way of
welds 237, as described in relation to the second embodiment). Accordingly, rotation of the rod
320 draws the expansion element 330 along the threaded leading portion 323 of the rod 320
toward the friction bolt body trailing end 112 into the cavity 113, as depicted in Figure 19.
Accordingly, the engagement surface 136 again engages the friction bolt body 110 and radially
outwardly deforms the tapered leading end portion 115 of the friction bolt body 110, bearing
against the bore hole wall 13 to provide a point anchoring effect.
[0070] The configuration of the friction bolt assembly 300 avoids the overhang of the rod 120
from the drive head 140 that occurs with the friction bolt assembly 100 of the first embodiment,
thereby providing a lower profile installation which may be of importance for low mine ceiling
heights. Instead, the threaded leading portion 323 of the rod 320 protrudes beyond the expansion
element 330.
[0071] A friction bolt assembly 400 according to a fourth embodiment is depicted in Figures 20
to 23. Features of the friction bolt assembly 400 that are identical to those of the friction bolt
assembly 300 of the third embodiment are provided with identical reference numerals.
14
[0072] The friction bolt assembly 400 of the fourth embodiment is identical to the friction bolt
assembly 300 of the third embodiment, except that a coarsely threaded bar 480 is fixed to the
trailing face of the drive head 340, and extends longitudinally therefrom. The threaded bar 480
may be fixed to the trailing face of the drive head 340 by Welding, although it is also envisaged
the coarsely threaded bar may be fixed by other means, included by threaded engagement with a
mating intemal thread formed in the rear of the drive head 340. The coarsely threaded bar 480
allows for securing of a roof mesh to the friction bolt assembly 400 after installation in the same
manner that a roof mesh may be secured to the protruding threaded trailing portion 124 of the
rod 120 of the friction bolt assembly 100 of the first embodiment. Installation of the friction bolt
assembly 400 is identical to that described above in relation to the friction bolt assembly 300 of
the first embodiment.
[0073] A friction bolt assembly 500 according to a fifth embodiment is depicted in Figures 24 to
28. Features of the friction bolt assembly 500 that are identical to those of the friction bolt
assemblies as described above are provided With identical reference numerals. Equivalent or
altemate features are provided With reference numerals equivalent to those set out above,
incremented accordingly.
[0074] The friction bolt assembly 500 is similar to the friction bolt assembly 300 of the third
embodiment except that, rather than having the drive head 540 fixed in relation to the rod 520,
the drive head 540 is in the form of an open hexagonal nut that is threadingly mounted on a
threaded trailing portion 524 of the rod 520 in the same manner as the drive head 140 of the
friction bolt assembly 100 of the first embodiment. The threaded leading portion 523 and
threaded trailing portion 524 of the rod 520 are like handed, each having a left handed thread for
installation With a standard installation rig con?gured to rotate in an anti-clockwise direction,
although it is also envisaged that both the threaded leading portion 523 and threaded trailing
portion 524 may be right handed, for installation by clockwise rotation of an installation rig.
[0075] To initially secure the expansion element 330 and drive head 540 on the rod 520 during
transportation and handling, the expansion element 330 may be tack Welded to the rod 520
adjacent the rod leading end 521 and the drive head 540 tack Welded to the rod 520 adjacent the
rod trailing end 522. The tack Welds Would then fail during rotation of the expansion element
330 and drive head 540 relative to the rod 520 during installation. Altematively, after mounting
the expansion element 330 and drive head 540 on the rod 520, the thread of the threaded leading
15
portion 523 and threaded trailing portion 524 of the rod 520 may be crimped or otherwise
deforrned adjacent to the rod leading and trailing ends 521, 522 respectively. The expansion
element 330 and drive head 540 may then be reverse threaded to abut against the crimp to
temporarily lock the expansion element 330/ drive head 540 to the rod 520 and specifically
prevent the expansion element 330 and drive head 540 from unscrewing off the rod 520 during
transport and handling. As another altemative, heat shrink material may be applied over the
expansion element 330 and adj acent portion of the threaded leading portion 523 of the rod 520,
both to protect the expansion element 330 during transport and any rough handling and also to
secure the expansion element 330 on the rod 520. During installation, the heat shrink would be
tom away by rotation of the rod 520, allowing relative movement between the expansion head
330 and rod 520. As another altemative, the drive head 540 may be driven along the threaded
trailing portion 524 of the rod 520 sufficiently to provide a light pretension of the rod 520,
forceably engaging the expansion element 530 and drive head 540 with the rod leading and
trailing ends 521, 522 respectively.
[0076] In the configuration depicted, the drive head 540 is provided with a coarse thread 541 on
its hexagonal drive faces to allow for securing of a roof mesh to the friction bolt assembly 500
after installation in the same manner that a roof mesh may be secured to the coarsely threaded
bar 480 of the friction bolt assembly 400 of the fourth embodiment described above, or the
protruding threaded trailing portion 124 of the rod 120 of the friction bolt assembly 100 of the
first embodiment as described above. Such an extemally coarsely threaded configuration of
drive head may also be applied to the other embodiments described above.
[0077] Installation of the friction bolt assembly 500 is generally as described above in relation to
the friction bolt assembly 100 of the first embodiment. After insertion and initial anchoring of
the friction bolt assembly 500 into a bore hole, additional anchoring of the friction bolt body 110
in the bore hole is again achieved by way of the expansion element 330 providing a point
anchoring effect. This is again achieved by actuating the rod 520 by rotation of the drive head
540. Again, the drive head 540 is driven in a direction tending to advance the drive head 540
along the threaded trailing portion 524 of the rod 520, in an anti-clockwise direction for a left
handed thread, as noted above. During rotation of the drive head 540, as tension in the rod 520
increases, friction due to inter-engagement of the threaded trailing portion 524 of the rod 520
with the internal thread of the drive head 540 will tend to rotate the rod 520. This in tum will
16
tend to advance the threaded leading portion 523 of the rod 520 through the expansion element
330, rotation of Which is substantially prevented by virtue of the key 137 as described above in
relation to the first embodiment. Accordingly, during rotation of the drive head 540, the
expansion element 330 Will be draWn toward the friction bolt body trailing end 112 into the
cavity 113, tending to outWardly deforrn the friction bolt body 110 at the friction bolt body
leading end 111.
[0078] The rod leading and trailing ends 521, 522 will tend to protrude through the open ends of
the expansion element 330 and drive head 540 respectively. Protrusion of the rod trailing end
522 through the drive head 540 Will provide a visual confirrnation that the point anchoring of the
friction bolt body 110 Within the bore hole has been achieved. Given that, as opposed to the
embodiments described above, the rod 520 Will travel both through the expansion element 330
and the drive head 540, the distance by Which the threaded trailing portion 523 of the rod 520
protrudes from the drive head 540 upon completion of installation Will generally be less than
Would occur with the friction bolt assembly 100 of the first embodiment described above. It is
for this reason that the coarsely extemally threaded form of the drive head 540 may be useful for
securing a roof mesh.
[0079] A friction bolt assembly 600 according to a sixth embodiment is depicted in Figures 29 to
31. Features of the friction bolt assembly 600 that are identical to those of the friction bolt
assemblies as described above are provided With identical reference numerals. Equivalent or
altemate features are provided With reference numerals equivalent to those set out above,
incremented accordingly.
[0080] The friction bolt assembly 600 is substantially identical to the friction bolt assembly 500
of the fifth embodiment, except that the collar 117, Welded to the friction bolt body of each of
the embodiments described above, is omitted. The friction bolt assembly 600 is installed in the
same manner as described above in relation to friction bolt assembly 500 of the fifth
embodiment.
[0081] The friction bolt assembly 600 may be particularly suitable for installations Where
dynamic loading may result from significant rock bursts or other seismic events, as may
particularly occur in hard rock mining applications. On the occurrence of such a rock burst or
other seismic event, resulting in significant movement of the rock, the rock bolt assembly 600 is
17
able to yield by allowing relative longitudinal displacement between the rod 520 and expansion
element 330. Such an installation is depicted in Figure 31, where a rock burst has resulted in a
lower rock strata layer 1 la being displaced from an upper rock strata layer 1 lb, to which the
rock bolt assembly 600 has been point anchored by way of radially outward deformation of the
friction bolt body leading end 111 through action of the expansion element 330. Rather than
displacement of the lower rock strata layer 1 la causing initial yielding of the rod 520 and friction
bolt body 110, followed by catastrophic failure, the friction bolt body 110 is able to remain
anchored to the upper rock strata layer lb, with the lower portion of the friction bolt body l10
passing up through the bore hole 10 within the lower rock strata layer 1 la. This is enabled by
the absence of the collar 117 that would otherwise engage the rock face 12 and prevent
movement of the friction bolt body 110 along the bore hole 10. With the rod 520 being fixed in
relation to the drive head 540 and load transfer frtting 160, the rod 520 and expansion head 330
remain fixed in relation to the lower strata layer 1 la and thus displaces with the lower rock strata
layer l la relative to the friction bolt body 110 and upper rock strata layer 1 lb. This is achieved
by displacement of the expansion element 330 along the cavity 113 of the friction bolt body 110
under a relatively constant load resulting from the outward deformation of the friction bolt body
110 as the expansion element 330 passes therethrough. The integrity of the friction bolt
assembly installation is thus maintained.
[0082] The person skilled in the art will appreciate other possible modi?cations and
confrgurations of the friction bolt assembly described above. In particular, it is envisaged that
the means for at least substantive preventing rotation of the expansion element relative to the
friction bolt body may take any of various alternate forms. In place of the key 137 described
above, the means may include altemate surface features of the expansion element, confrgured to
engage the friction bolt body. Such alternate surface features might include, for example, a
roughened or knurled configuration of the engagement surface of the expansion element.
Claims (20)
1. A friction bolt assembly comprising: a generally tubular friction bolt body longitudinally extending between a friction bolt body leading end and a friction bolt body trailing end, said friction bolt body defining a cavity longitudinally extending through said friction bolt body and having a split longitudinally extending along said friction bolt body to said friction bolt body leading end; a rod longitudinally extending through said cavity between a rod leading end and a rod trailing end; an expansion element mounted on, or integrally formed with, said rod and protruding through said friction bolt body leading end, said expansion element having an engagement surface tapering toward said rod trailing end; and a drive head mounted on, or integrally formed with, said rod at or adjacent said rod trailing end, said rod being actuatable by rotation of said drive head to draw said expansion element toward said friction bolt body trailing end such that said engagement surface engages said friction bolt body at said friction bolt body leading end, radially outwardly deforming said friction bolt body at said friction bolt body leading end; wherein said friction bolt assembly ?irther comprises means for at least substantially preventing rotation of said expansion element relative to said friction bolt body.
2. The friction bolt assembly of claim 1 wherein said expansion element is located at or adjacent said rod leading end.
3. The friction bolt assembly of either one of claims 1 and 2, wherein said means comprises a surface feature of said expansion element configured to engage said friction bolt body.
4. The friction bolt assembly of claim 3, wherein said surface feature comprises a key projecting from said engagement surface into said split.
5. The friction bolt assembly of either one of claims 1 and 2, wherein said means comprises one or more welds fixing said expansion element to said friction bolt body, said one or more welds being con?gured to fail upon application of a predeterrnined load tending to draw said expansion element toward said friction bolt body trailing end. 19
6. The friction bolt assembly of any one of claims 1 to 5, wherein said drive head is threadingly mounted on a threaded trailing portion of said rod such that, upon actuation of said rod by rotation of said drive head, said threaded trailing portion of said rod is drawn through said drive head.
7. The friction bolt assembly of claim 6, wherein said expansion element remains fixed in relation to said rod during said actuation of said rod.
8. The friction bolt assembly of claim 6, wherein said expansion element is threadingly mounted on a threaded leading portion of said rod, said threaded leading portion and said threaded trailing portion of said rod being like-handed.
9. The friction bolt assembly of any one of claims 1 to 5, wherein said expansion element is threadingly mounted on a threaded leading portion of said rod such that, upon actuation of said rod by rotation of said drive head, said rod rotates with said drive head, drawing said expansion element along said threaded leading portion of said rod.
10. The friction bolt assembly of claim 9, wherein said drive head remains fixed in relation to said rod during said actuation.
11. The friction bolt assembly of one of claims 1 to 10, Wherein said friction bolt assembly further comprises a load transfer ?tting mounted on said rod between said drive head and said friction bolt body trailing end, said load transfer ?tting having a pro?led leading face configured to engage and support said friction bolt body trailing end.
12. A friction bolt assembly comprising: a generally tubular friction bolt body longitudinally extending between a friction bolt body leading end and a friction bolt body trailing end, said friction bolt body defining a cavity longitudinally extending through said friction bolt body and having a split longitudinally extending along said friction bolt body to said friction bolt body leading end; a rod longitudinally extending through said cavity between a rod leading end and a rod trailing end; 20 an expansion element mounted on, or integrally formed With, said rod and protruding through said friction bolt body leading end, said expansion element having an engagement surface tapering toward said rod trailing end; and a drive head mounted on, or integrally formed with, said rod at or toward said rod trailing end, said rod being actuatable by rotation of said drive head to draw said expansion element toward said friction bolt body trailing end such that said engagement surface engages said friction bolt body at said friction bolt body leading end, radially outwardly deforming said friction bolt body at said friction bolt body leading end; wherein said friction bolt body has a tapered leading portion tapering to said friction bolt body leading end, the maximum diameter of said engagement surface being greater than the internal diameter of said friction bolt body at said friction bolt body leading end and less than the maximum diameter of said friction bolt body.
13. The friction bolt assembly of claim 12 wherein said expansion element is located at or adjacent said rod leading end.
14. The friction bolt assembly of either one of claims 12 and 13, wherein said drive head is threadingly mounted on a threaded trailing portion of said rod such that, upon actuation of said rod by rotation of said drive head, said threaded trailing portion of said rod is drawn through said drive head.
15. The friction bolt assembly of claim 14, wherein said expansion element remains fixed in relation to said rod during said actuation of said rod.
16. The friction bolt assembly of claim 14, wherein said expansion element is threadingly mounted on a threaded leading portion of said rod, said threaded leading portion and said threaded trailing portion of said rod being like-handed.
17. The friction bolt assembly of either one of claims 12 and 13, wherein said expansion element is threadingly mounted on a threaded leading portion of said rod such that, upon actuation of said rod by rotation of said drive head, said rod rotates with said drive head, drawing said expansion element along said threaded leading portion of said rod. 21
18. The friction bolt assembly of claim 17, Wherein said drive head remains fixed in relation to said rod during said actuation.
19. The friction bolt assembly of any one of claims 12 to 18, Wherein said friction bolt assembly further comprises a load transfer ?tting mounted on said rod between said drive head and said friction bolt body trailing end, said load transfer ?tting having a pro?led leading face conñgured to engage and support said friction bolt body trailing end.
20. A method of installing the friction bolt assembly of any one of claims 1 to 19, comprising the steps of: drilling a bore hole into a rock face of a rock strata to be stabilized, said bore hole having a diameter greater than the maximum diameter of said expansion element and less than the maximum diameter of said friction bolt body; inserting said friction bolt assembly into said bore hole With said expansion element leading; applying percussive force to said friction bolt body to drive said friction bolt body into said bore hole With an interference fit; rotating said drive head to actuate said rod, drawing said expansion element towards said friction bolt body trailing end and engaging said engagement surface With said friction bolt body at said friction bolt leading end, thereby outWardly radially deforming said friction bolt body at said friction bolt body leading end into bearing engagement With the Wall of said bore hole.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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AU2013902819A AU2013902819A0 (en) | 2013-07-30 | Friction bolt assembly | |
AU2013904972A AU2013904972A0 (en) | 2013-12-19 | Friction bolt assembly | |
PCT/AU2014/000757 WO2015013743A1 (en) | 2013-07-30 | 2014-07-29 | Friction bolt assembly |
Publications (1)
Publication Number | Publication Date |
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SE1551687A1 true SE1551687A1 (sv) | 2015-12-21 |
Family
ID=52430743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SE1551687A SE1551687A1 (sv) | 2013-07-30 | 2014-07-29 | Friction bolt assembly |
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US (1) | US10066483B2 (sv) |
AU (1) | AU2014295892B2 (sv) |
CA (1) | CA2916043C (sv) |
PL (1) | PL416170A1 (sv) |
SE (1) | SE1551687A1 (sv) |
WO (1) | WO2015013743A1 (sv) |
ZA (1) | ZA201600134B (sv) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015085349A1 (en) * | 2013-12-12 | 2015-06-18 | Garock Pty Ltd | Ground support apparatus and method |
AU2016202889B2 (en) * | 2015-06-29 | 2021-08-05 | DSI Underground Australia Pty Limited | Friction bolt assembly |
US10677057B2 (en) | 2015-07-21 | 2020-06-09 | Ncm Innovations (Pty) Ltd | Pneumatic drill installed rock anchor |
AU2015403063B2 (en) | 2015-07-21 | 2020-12-17 | Epiroc Drilling Tools Ab | Radially expansible rock bolt |
AU2016363530B2 (en) * | 2015-11-30 | 2021-08-05 | Sandvik Intellectual Property Ab | Friction bolt |
CA3008179C (en) * | 2015-12-16 | 2024-01-02 | Dywidag-Systems International Pty Limited | Friction bolt assembly |
WO2017120633A1 (en) * | 2016-01-12 | 2017-07-20 | Capell Dale | A point anchoring device |
AU2016101727A4 (en) * | 2016-09-26 | 2016-11-03 | Fci Holdings Delaware, Inc. | Rock bolt |
CN106884837B (zh) * | 2017-03-30 | 2023-09-01 | 红塔烟草(集团)有限责任公司 | 一种易取出能重复利用的膨胀螺栓 |
CA3061742A1 (en) * | 2017-05-07 | 2018-11-15 | Epiroc Holdings South Africa (Pty) Ltd | Rock bolt assembly with failure arrestor |
WO2019038247A1 (en) * | 2017-08-22 | 2019-02-28 | Sandvik Intellectual Property Ab | ANCHOR BOLT WITH GEAR ADAPTER |
CN107387143A (zh) * | 2017-08-30 | 2017-11-24 | 成都现代万通锚固技术有限公司 | 一种摩擦固定式锚杆 |
CN111433437B (zh) * | 2017-11-27 | 2022-12-30 | 山特维克知识产权股份有限公司 | 具有锚网适配器的岩栓 |
ZA201902922B (en) * | 2018-05-11 | 2022-03-30 | Epiroc Holdings South Africa Pty Ltd | Method of ensuring controlled failure of rock bolt bar |
EP4242423A3 (en) * | 2018-08-23 | 2023-11-08 | Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd | Rock bolt with information display region |
US20220316512A1 (en) * | 2021-03-30 | 2022-10-06 | Yoke Industrial Corp. | Expansion anchoring device |
EP4130427A1 (en) | 2021-08-05 | 2023-02-08 | Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd | Double-wedge rock bolt |
EP4174284A1 (en) | 2021-10-28 | 2023-05-03 | Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd. | Rock bolt |
Family Cites Families (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2442113A (en) * | 1945-05-25 | 1948-05-25 | Beijl Zako Sytse | Tunnelling and like subterranean operations |
US2673452A (en) * | 1950-04-12 | 1954-03-30 | Milton H Fies | Apparatus for installing roof suspension bolts in mines |
US2741461A (en) * | 1950-09-07 | 1956-04-10 | Joy Mfg Co | Drill |
US3311012A (en) * | 1965-03-11 | 1967-03-28 | Chester I Williams | Pressure-actuated expanding anchor |
US3973409A (en) * | 1974-07-05 | 1976-08-10 | Kabushiki Kaisha Takechi Koumusho | Apparatus for establishing an anchor |
US4056036A (en) * | 1976-03-17 | 1977-11-01 | Bergwerksverband Gmbh | Borehole anchor |
SE413691B (sv) * | 1977-08-31 | 1980-06-16 | Atlas Copco Ab | Bergbultningsaggregat |
ZA777581B (en) * | 1977-12-21 | 1979-05-30 | L Herron | Improvements in or relating to rock drilling rigs |
US4274762A (en) * | 1978-03-03 | 1981-06-23 | Frederick Johnson | Prestressed rock truss |
US4140428A (en) * | 1978-03-06 | 1979-02-20 | Shakespeare Company | Tie rod support for mine |
SE426511B (sv) * | 1978-06-13 | 1983-01-24 | Linden Alimak Ab | Anordning for automatiserad bultisettning vid bergforsterkning |
US4194858A (en) * | 1978-09-25 | 1980-03-25 | The Eastern Company | Mine roof bolt anchor installation |
US4305687A (en) * | 1979-01-26 | 1981-12-15 | Jack Parker | Anchoring system for rock bolts |
US4347020A (en) * | 1980-01-02 | 1982-08-31 | Birmingham Bolt Company | Mine roof bolt assembly |
US4316677A (en) * | 1980-03-07 | 1982-02-23 | Armand Ciavatta | Tubular shank device |
US4322183A (en) * | 1980-03-07 | 1982-03-30 | Armand Ciavatta | Friction rock stabilizer and installation lubricating cement apparatus and method |
US4313628A (en) * | 1980-05-08 | 1982-02-02 | Duenke Milton J | Coupling for hoses and similar conduits |
US4398850A (en) * | 1981-02-09 | 1983-08-16 | Copper Range Company | Roof bolter and process |
US4430025A (en) * | 1981-03-04 | 1984-02-07 | Armand Ciavatta | Oblate friction rock stabilizer and installation lubricating cement utilized therewith |
US4437795A (en) * | 1981-11-02 | 1984-03-20 | Birmingham Bolt Company | Mine roof anchor assembly |
FR2556771B1 (fr) * | 1983-12-16 | 1986-05-02 | Eimco Secoma | Tete avant de tourelle ou glissiere d'appareil de foration, permettant l'injection de cartouches de resine |
US4601614A (en) * | 1984-02-22 | 1986-07-22 | Lane William L | Rockbolt |
US4759888A (en) * | 1985-06-26 | 1988-07-26 | Brest Van Kempen Carel J H | Method for automatically installing and testing grouted rock bolts |
FI79598C (sv) * | 1985-11-07 | 1990-01-10 | Tampella Oy Ab | Förfarande och anordning för styrning av en betongmatningsslang vid gj utbultning i berg |
FI79597C (sv) * | 1985-11-07 | 1990-01-10 | Tampella Oy Ab | Förfarande och apparat för matning av betong i ett borrhål vid betongb ultning av berg. |
US4661022A (en) * | 1985-11-14 | 1987-04-28 | Seegmiller Ben L | Rock bolt structure and installation |
US5082399A (en) * | 1988-08-08 | 1992-01-21 | Jennmar Corporation | Mine roof anchor having adjustable resin retaining washer and expansion shell assembly with friction reducing means |
SE465092B (sv) * | 1990-07-10 | 1991-07-22 | Atlas Copco Constr & Mining | Anordning foer saettning av bergbult |
US5076734A (en) * | 1990-10-05 | 1991-12-31 | H & S Machine And Supply Co., Inc. | Roof bolt with paddle resin mixer and method for making the same |
SE466067B (sv) * | 1990-12-03 | 1991-12-09 | Atlas Copco Constr & Mining | Bergbultningsanordning |
US5244314A (en) * | 1991-06-27 | 1993-09-14 | Jennmar Corporation | Expansion assembly |
CA2122945C (en) * | 1993-05-05 | 2003-06-10 | John Christian Wilkinson | Rock bolt shell and cone |
US6447210B1 (en) * | 2001-02-26 | 2002-09-10 | Oldenburg Cannon, Inc. | Resin nozzle positioner |
US20040165958A1 (en) * | 2001-04-20 | 2004-08-26 | Mclaren Matthew David | Inserter and cap |
PT1546508E (pt) * | 2002-08-02 | 2011-03-09 | Dywidag Systems Internat Pty Ltd | Aparelho de pós cimentação de parafuso de ancoragem |
US20040161316A1 (en) * | 2003-02-19 | 2004-08-19 | F.M. Locotos Co., Inc. | Tubular mining bolt and method |
US7416033B2 (en) * | 2003-07-08 | 2008-08-26 | J.H. Fletcher & Co. | Instrumented drill head, related drilling/bolting machines, and methods |
BRPI0415904A (pt) * | 2003-10-27 | 2007-01-16 | Marcellin Bruneau | dispositivo de ancoragem com uma camisa de expansão elástica |
CA2544494C (en) * | 2003-11-07 | 2010-07-13 | Sean Peter Buxton | Plug member |
SE527424C2 (sv) * | 2004-07-08 | 2006-02-28 | Atlas Copco Rocktech Ab | Anordning och förfarande vid injektering och fastsättning av armerings- och/eller förankringselement i bergvägg |
AT501441A3 (de) * | 2004-12-23 | 2009-12-15 | Atlas Copco Mai Gmbh | Verfahren zum setzen von gebirgsankern und bei diesem verfahren verwenbarer gebirgsanker |
PL210987B1 (pl) * | 2005-06-03 | 2012-03-30 | J L Fletcher & Co | Zespół do zastosowania przy wierceniu otworu w ścianie korytarza kopalni przy użyciu elementu wiercącego i instalowaniu śruby w wywierconym już otworze, zespół do zastosowania przy wierceniu w ścianie korytarza kopalni przy użyciu elementu wiercącego, zespół do zastosowania przy instalowaniu śruby w ścianie korytarza kopalni, zespół do zastosowania przy wierceniu otworu w ścianie korytarza kopalni przy użyciu elementu wiercącego i instalowania śruby w uformowanym już otworze, zespół wiercący lub kotwiący, magazynek na wiele śrub, które mają być zainstalowane w jed |
US7481603B1 (en) * | 2005-10-07 | 2009-01-27 | Shelter Technologies, Llc | Tensionable spiral bolt with resin nut and related method |
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 |
US7607866B2 (en) * | 2006-06-07 | 2009-10-27 | Joy Mm Delaware, Inc. | Drilling rig |
US7758284B2 (en) * | 2006-10-09 | 2010-07-20 | Rhino Technologies Llc | Tensionable spiral bolt with resin nut and related method |
WO2009023922A1 (en) * | 2007-08-22 | 2009-02-26 | Dywidag-Systems International Pty Limited | Friction bolt assembly |
CA2754710C (en) * | 2009-03-10 | 2017-08-01 | Sandvik Intellectual Property Ab | Friction bolt |
US20120034036A1 (en) * | 2009-04-16 | 2012-02-09 | Gary Robert Davison | Friction stabiliser |
NZ611853A (en) | 2010-12-01 | 2015-05-29 | Peter Andrew Gray | A nut assembly |
ZA201207431B (en) | 2011-10-21 | 2013-05-29 | Innovative Mining Products (Pty) Ltd | A radially expansible rock bolt |
US8956082B2 (en) * | 2012-10-23 | 2015-02-17 | 1311854 Ontario Limited | Rock bolting system, method of installing rock bolts, and flexible bolt centralizer |
EP2920419A2 (en) * | 2012-10-26 | 2015-09-23 | Jurie Pretorius Smit | Rock anchoring system and method |
CA2890020C (en) * | 2012-11-09 | 2021-01-12 | Gazmick Pty Ltd | Device, method and system for loading fixatives for rock bolts |
SE539707C2 (sv) * | 2013-06-26 | 2017-11-07 | Atlas Copco Rock Drills Ab | Anordning och metod för positionering av patroner för en berginjekteringsutrustning |
-
2014
- 2014-07-29 AU AU2014295892A patent/AU2014295892B2/en active Active
- 2014-07-29 CA CA2916043A patent/CA2916043C/en active Active
- 2014-07-29 US US14/907,909 patent/US10066483B2/en active Active
- 2014-07-29 SE SE1551687A patent/SE1551687A1/sv not_active Application Discontinuation
- 2014-07-29 WO PCT/AU2014/000757 patent/WO2015013743A1/en active Application Filing
- 2014-07-29 PL PL416170A patent/PL416170A1/pl unknown
-
2016
- 2016-01-07 ZA ZA2016/00134A patent/ZA201600134B/en unknown
Also Published As
Publication number | Publication date |
---|---|
US10066483B2 (en) | 2018-09-04 |
CA2916043C (en) | 2021-11-09 |
PL416170A1 (pl) | 2016-08-16 |
WO2015013743A1 (en) | 2015-02-05 |
CA2916043A1 (en) | 2015-02-05 |
US20160186564A1 (en) | 2016-06-30 |
AU2014295892B2 (en) | 2018-07-19 |
AU2014295892A1 (en) | 2016-01-21 |
ZA201600134B (en) | 2019-01-30 |
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