CA2590589C - Improved rebar insertion device - Google Patents
Improved rebar insertion device Download PDFInfo
- Publication number
- CA2590589C CA2590589C CA2590589A CA2590589A CA2590589C CA 2590589 C CA2590589 C CA 2590589C CA 2590589 A CA2590589 A CA 2590589A CA 2590589 A CA2590589 A CA 2590589A CA 2590589 C CA2590589 C CA 2590589C
- Authority
- CA
- Canada
- Prior art keywords
- support member
- ground support
- drill
- anchoring
- hole
- 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.)
- Active
Links
- 238000003780 insertion Methods 0.000 title claims abstract description 76
- 230000037431 insertion Effects 0.000 title claims abstract description 76
- 238000004873 anchoring Methods 0.000 claims abstract description 69
- 239000011435 rock Substances 0.000 claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
- 230000006641 stabilisation Effects 0.000 claims abstract description 5
- 238000011105 stabilization Methods 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims description 29
- 229920005989 resin Polymers 0.000 claims description 29
- 238000005553 drilling Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003578 releasing effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims description 2
- 241000269627 Amphiuma means Species 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
An improved ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while it is being inserted into a first drill hole; and, anchoring means disposed opposite the clutch assembly and adapted for temporarily anchoring the device for stabilization in a rock formation during insertion of the ground support member.
Description
IMPROVED REBAR INSERTION DEVICE
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is related to our pending application CA 2460497 filed on 2004/03/09.
TECHNICAL FIELD
The present invention relates generally to mining ground support and particularly to an improved apparatus and method for inserting ground support members during mining ground support operations.
BACKGROUND
Ground support apparatus and methods using combined mechanical and chemical means are well known in the mining, tunneling and construction industries. Basically, a hole is drilled in the surrounding rock formation from unstable to stable strata. Packaged resin compounds are inserted into the drilled hole. A ground support member is then inserted into the drilled hole which punctures the resin packages. The member is rotated to ensure that the resin mixes and fills the annulus between the member and the inside surface of the drill hole. The resin hardens and then the member is tensioned to a predetermined load. To facilitate the ground support operation a variety of machines have been proposed to insert the ground support member into the drill hole. One such machine is described in our pending patent application CA 2460497 Rebar Insertion Device by John Fifield filed on 2004/03/09. This device works well in many ground support applications but it has a number of weaknesses that have become apparent from field use. For example, a significant amount of force is required to push a ground support member into a pre-drilled hole and through packaged resin. This force is applied by the pusher leg or jackleg which is a pneumatic or hydraulic piston to which the drill is attached. As this force is applied to the ground support member lateral forces are created in the pusher leg and in the supports of the pusher leg which have been found to destabilize the apparatus because it is not supported for these loads. This causes the drill and pusher leg to move and swivel which can damage the ground support member and create a worker hazard. Therefore there is a need to resolve this problem to prevent damage to the ground support member which may compromise its structural integrity and to prevent injury to the drill operator.
SUMMARY OF THE INVENTION
The problem is solved by the provision of an improved ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is related to our pending application CA 2460497 filed on 2004/03/09.
TECHNICAL FIELD
The present invention relates generally to mining ground support and particularly to an improved apparatus and method for inserting ground support members during mining ground support operations.
BACKGROUND
Ground support apparatus and methods using combined mechanical and chemical means are well known in the mining, tunneling and construction industries. Basically, a hole is drilled in the surrounding rock formation from unstable to stable strata. Packaged resin compounds are inserted into the drilled hole. A ground support member is then inserted into the drilled hole which punctures the resin packages. The member is rotated to ensure that the resin mixes and fills the annulus between the member and the inside surface of the drill hole. The resin hardens and then the member is tensioned to a predetermined load. To facilitate the ground support operation a variety of machines have been proposed to insert the ground support member into the drill hole. One such machine is described in our pending patent application CA 2460497 Rebar Insertion Device by John Fifield filed on 2004/03/09. This device works well in many ground support applications but it has a number of weaknesses that have become apparent from field use. For example, a significant amount of force is required to push a ground support member into a pre-drilled hole and through packaged resin. This force is applied by the pusher leg or jackleg which is a pneumatic or hydraulic piston to which the drill is attached. As this force is applied to the ground support member lateral forces are created in the pusher leg and in the supports of the pusher leg which have been found to destabilize the apparatus because it is not supported for these loads. This causes the drill and pusher leg to move and swivel which can damage the ground support member and create a worker hazard. Therefore there is a need to resolve this problem to prevent damage to the ground support member which may compromise its structural integrity and to prevent injury to the drill operator.
SUMMARY OF THE INVENTION
The problem is solved by the provision of an improved ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means
2 and adapted for holding a ground support member while it is being inserted into a first drill hole; and, anchoring means disposed opposite the clutch assembly and adapted for temporarily anchoring the device for stabilization in a rock formation during insertion of the ground support member. The attaching means is separated from the clutch assembly by a rectangular channel welded between the clutch assembly and the anchoring means. The rectangular channel further comprises a front, a back, a first side and a second side. The clutch assembly comprises a rectangular housing welded to the front of the rectangular channel and a roller housed within the rectangular housing. The roller is adapted for frictional rolling engagement with the ground support member. The roller is eccentrically mounted on an axle for limited pivoting movement about the axle. The rectangular housing comprises an open bottom, a partially closed top, a first side, a second side, a back and a front. The open bottom facilitates insertion of the ground support member into the device. The partially closed top comprises a top plate adapted to permit passage of the ground support member through the rectangular housing while impeding debris from entering the rectangular housing by way of
3 the partially closed top. The first side is at least partially enclosed by a first side plate. The second side is at least partially enclosed by a second side plate. The first side plate and the second side plate are adapted to guide the movement of the roller within the rectangular housing. The front is enclosed by a front plate attached to at least one of the first and second side plates. The front plate has a flat outside surface and an inside surface having a groove adapted for frictional siding engagement with the ground support member as it passes through the housing. The back is enclosed by a back plate attached to the front of the rectangular channel. The first and second side plates comprise respective first and second apertures disposed opposite to each other for mounting the axis of the roller. The first and second side plates further comprise respective third and fourth apertures disposed opposite to each other for mounting a tensionable reinforcing member that also acts as a bottom stop for the roller. The tensionable reinforcing member is further adapted to ensure parallel alignment of the first and second side plates. The anchoring means comprises a first projecting member fixed to the back of the rectangular channel. The member has a first end disposed downward for
4 attachment to the jackleg drill and a second threaded end disposed upward for threaded attachment to an anchoring member for insertion into a second predrilled hole having a depth in the rock formation and adapted for temporarily receiving the anchoring member. There is a second projecting member fixed to the back of the rectangular channel adjacent to the first projecting member and disposed downward for reinforcement in order to impede device rotation during the insertion of the ground support member. The anchoring member comprises a first end adapted for inserting into the second predrilled hole and a second threaded end adapted for threaded engagement with the threaded second end of the first projecting member. The anchoring member has a length less than the depth of the second predrilled hole. The anchoring member is adapted to resist lateral forces resulting from resistance to the ground support member being inserted into the first predrilled hole. The ground support member is inserted between the roller member and the groove in the inside surface of the front plate act in frictional engagement, so that when the ground support member receive a thrust from the jackleg drill it is pushed towards the first hole and the roller
5 pivots upwards in a releasing action permitting frictional movement of the ground support member, and so that when the thrust is removed, gravity will pull the ground support member down thereby permitting the roller to pivot downwards and into a position wherein it acts in a pinching combination with the groove to generate a pinch force capable of holding the ground support member stationary against the force of gravity.
A ground support member insertion kit for use in combination with a jackleg drill is also provided and comprises a ground support member insertion device comprising attaching means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while it is being inserted into a first drill hole that has been pre-loaded with resin, anchoring means disposed opposite the clutch assembly and adapted for temporarily anchoring the device in a rock formation during insertion of the ground support member; and, an impact tool temporarily fixable to the jackleg drill and adapted for engaging the proximate end of the ground support member by engagement means and transmitting
A ground support member insertion kit for use in combination with a jackleg drill is also provided and comprises a ground support member insertion device comprising attaching means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while it is being inserted into a first drill hole that has been pre-loaded with resin, anchoring means disposed opposite the clutch assembly and adapted for temporarily anchoring the device in a rock formation during insertion of the ground support member; and, an impact tool temporarily fixable to the jackleg drill and adapted for engaging the proximate end of the ground support member by engagement means and transmitting
6 percussive and rotational movement to the ground support member during insertion into the resin.
There is also provided a system for installing a ground support member with resin comprising a rock drill for drilling a first hole for permanently accepting the ground support member and resin in combination and a second hole for temporarily accepting an anchoring member for stabilization, ajackleg drill for mounting the rock drill and for providing thrust to the ground support member during insertion into the first hole and resin, a ground support member insertion device temporarily mounted to the jackleg drill for holding the ground support member during insertion into the first hole. The device acts in cooperation with the anchoring member to stabilize the jackleg drill during insertion. The system further includes an impact tool temporarily fixable to the rock drill and adapted for engaging the proximate end of the ground support member by engagement means and transmitting percussive and rotational forces from the rock drill to the ground support member
There is also provided a system for installing a ground support member with resin comprising a rock drill for drilling a first hole for permanently accepting the ground support member and resin in combination and a second hole for temporarily accepting an anchoring member for stabilization, ajackleg drill for mounting the rock drill and for providing thrust to the ground support member during insertion into the first hole and resin, a ground support member insertion device temporarily mounted to the jackleg drill for holding the ground support member during insertion into the first hole. The device acts in cooperation with the anchoring member to stabilize the jackleg drill during insertion. The system further includes an impact tool temporarily fixable to the rock drill and adapted for engaging the proximate end of the ground support member by engagement means and transmitting percussive and rotational forces from the rock drill to the ground support member
7 during insertion into the resin and tensioning of the ground support member.
There is also a method for inserting a ground support member permanently into a first hole filled with resin comprising the steps of:
a. drilling the first hole having a first depth using ajackleg drill;
b. inserting a bonding agent including resin into the first hole;
c. drilling a second hole having a second depth using the jackleg drill wherein the second depth is less than the first depth;
d. installing a ground support member insertion device onto the jackleg drill, the ground support member insertion device comprising:
i. attaching means for attaching the device to the jackleg drill;
ii. a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while permitting movement of the ground
There is also a method for inserting a ground support member permanently into a first hole filled with resin comprising the steps of:
a. drilling the first hole having a first depth using ajackleg drill;
b. inserting a bonding agent including resin into the first hole;
c. drilling a second hole having a second depth using the jackleg drill wherein the second depth is less than the first depth;
d. installing a ground support member insertion device onto the jackleg drill, the ground support member insertion device comprising:
i. attaching means for attaching the device to the jackleg drill;
ii. a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while permitting movement of the ground
8 support member in a distal direction and preventing movement in a proximate direction; and, iii. anchoring means disposed opposite the clutch assembly, the anchoring means comprising an anchoring member adapted for temporarily anchoring the device in the second hole during insertion of the ground support member for stability;
e. temporarily fixing the anchoring member to the ground support member insertion device;
f. maneuvering the jackleg drill so that the anchoring member is inserted into the second hold and the ground support member insertion device is poised below the first hole;
g. inserting a ground support member into the clutch assembly, wherein the ground support member comprises a distal end for insertion into the first hole and a proximate end adapted to receive thrust from the jackleg drill, and wherein the ground support member is held stationary within the clutch until a first thrust is applied from the jackleg drill;
e. temporarily fixing the anchoring member to the ground support member insertion device;
f. maneuvering the jackleg drill so that the anchoring member is inserted into the second hold and the ground support member insertion device is poised below the first hole;
g. inserting a ground support member into the clutch assembly, wherein the ground support member comprises a distal end for insertion into the first hole and a proximate end adapted to receive thrust from the jackleg drill, and wherein the ground support member is held stationary within the clutch until a first thrust is applied from the jackleg drill;
9 h. applying a first thrust from the jackleg drill to the proximate end of the ground support member thereby forcing it through the clutch and into the first hole a first distance so that the distal end of the ground support member engages the binding resin;
i. withdrawing the jackleg drill a second distance thereby removing thrust from the ground support member and engaging the clutch so that the grounds support member is held stationary;
j. applying a second thrust to the proximate end of the ground support member in order to move it a second distance into the first hole;
k. repeating steps h to j until the ground support member is in a desired location;
I. allowing the resin to set in a binding relationship with the ground support member;
m. removing the ground support member insertion device from the jackleg drill;
n. installing an impact tool on the jackleg drill whereby the distal end of the impact tool engages the proximate end of the ground support member by engagement means thereby permitting the transmission of percussive and rotational forces from the jackleg drill to the ground support member until a desired tension is achieved within the ground support member.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic drawing of a jackleg leg drill and invention in a mine.
Figure 2 is a schematic drawing of the top of one example of the invention.
Figure 3 is the same figure as Figure 2.
Figure 4 is a schematic side view of a reinforcing member in one example of the clutch assembly.
Figure 5 is another schematic view of a reinforcing member in one example of the clutch assembly.
Figure 6 is a bottom view of one example of the invention.
Figure 7 is a side view of the one example of the invention.
Figure 8 is a view of one example of the anchoring member of the invention.
Figure 9 is a view of one example of the impact tool of the invention.
DETAILED DESCRIPTION
Referring to Figure 1, there is shown a schematic view of one example of our invention being an improved ground support member insertion device (10) comprising means (24) for attaching the device to a jackleg drill (14). A clutch assembly (16) is disposed adjacent to the attaching means (24) and separated from the attaching means by a rectangular spacing member (26) adapted to provide proper spacing between the drill and the clutch assembly. The clutch assembly (16) is adapted for holding and guiding a ground support member (18) insertion while it is being inserted into a first drill hole (20) within a rock body (22). The jackleg drill is also called a pushleg drill and is a pneumatic or hydraulic assisted device used to provide thrust to the drill bit in drilling operations.
Typically the jackleg drill will be installed upon a tripod (23) support or some other type of support for stability.
Referring to Figure 1 and Figure 2, in another example (10) of the invention there is illustrated schematically in a top view other elements of the invention including anchoring means (24) disposed opposite the clutch assembly (16). The anchoring means are adapted for temporarily anchoring the device (10) in the rock body (22) during insertion of the ground support member (18) and for attaching the device (10) to the jackleg drill.
Rectangular channel member (26) is welded (27) between the clutch assembly (16) and the anchoring means (24). The rectangular channel member comprises a front (28), a back (30), a first side (32) and a second side (34). The rectangular channel member provides spacing between the clutch assembly (16) and the end (36) of the jackleg drill (14).
Referring now to Figure 3, which is identical to Figure 2, the clutch assembly (16) comprises a rectangular housing (40) welded (27) to the front (28) of the rectangular channel member (26). Within the rectangular housing is housed a roller (42). The roller is adapted for a frictional rolling engagement with the ground support member (18) as more fully explained below.
Referring to Figure 4 and Figure 5, the roller (42) is eccentrically mounted on an axle (44) within the clutch housing (16). The axle (44) provides for a limited pivoting movement between a first engaged position (46) when the roller is acting to prevent the ground support member (18) from moving backwards (47) by moving in a clockwise (49) rotation about the axis in order to pinchingly engage the ground support member (18) within the groove (51).
Referring to Figure 5, there is a second disengaged position (48). In the disengaged position (48) the roller (42) is rotated counter clock-wise (54) about the axle (44) so that it disengages the ground support member 5(18) and permits one-way movement (56) of the ground support member towards the first hole. The surface (50) of the roller is always in a frictional engagement with the grounds support member (18) while it is moving so that should forces of gravity act on the ground support member the roller will automatically engage into its engagement position thereby locking the ground support member in place. The surface (50) of the roller is adapted for frictional engagement with a steel ground support member and in one example of the invention it may be knurled.
Other types of surface patterns are also possible to obtain the same gripping effect between the surface of the roller and the surface of the ground support member.
Referring to Figures 1 to 6, the ground support member (18) is inserted between the roller (42) and the groove (51) in the inside surface (84) of the front plate (70) and cooperate in a frictional engagement, so that when the ground support member (18) receives thrust from the jackleg drill (14) it is pushed towards the first hole (20) and the roller pivots upwards (54) in a releasing action permitting frictional movement of the ground support member through the housing (16). When the thrust is removed, gravity (47) will pull the ground support member down thereby permitting the roller to pivot downwards (49) and into a position wherein it acts in a pinching combination with the groove (51) to generate a pinch force capable of holding the ground support member stationary against the force of gravity.
Still referring to Figure 6, there is shown a bottom view of the ground support member insertion device (10). The rectangular housing (16) comprises an open bottom (60), a partially closed top (62 Figure 3), a first side (64), a second side (66), a back (68) and a front (70). The open bottom (60) facilitates insertion of the ground support member (18) into the groove (5 1) in front of the roller (42). The partially closed top (62) comprises a top plate (72 Figure 3) adapted to permit passage of the ground support member (18) through the rectangular housing (16) while impeding debris from entering the rectangular housing by way of the partially closed top. The first side (64) is at least partially enclosed by a first side plate (74). The second side (66) is at least partially enclosed by a second side plate (76). The first side plate (74) and the second side plate (76) are adapted to guide the movement of the roller (42) within the rectangular housing (16). The front (70) is enclosed by a front plate (80) attached to at least one of the first and second side plates. The front plate (80) has a flat outside surface (82) and an inside surface (84) having groove (51) adapted for frictional siding engagement with the ground support member (18) as it passes through the rectangular housing (16).
The back (68) is enclosed by a back plate (86) that is attached by welding (27) to the front (28) of the rectangular channel (26). The first (74) and second (76) side plates comprise respective first (90) and second (92) apertures disposed opposite to each other for mounting the axle (44) of the roller (42). The first and second side plates further comprise respective third (94) and fourth (96) apertures disposed opposite to each other for mounting a tensionable reinforcing member (98) that also acts as a bottom roller stop. The tensionable reinforcing member (98) is further adapted to ensure parallel alignment of the first and second side plates.
Referring to Figure 7, there is shown another example of the ground support member insertion device in a first side view. The anchoring means (24) comprises a first projecting member (100) fixed to the back (30) of the rectangular channel (26). The first projecting member is a single length of steel rod. The first projecting member (100) has a first end (102) disposed downward (104) for attachment to the jackleg drill.
The first projecting member has a second threaded end (106) disposed upward (108) for threaded attachment to an anchoring member (110) further described in Figure 8.
Referring back to Figure 1, there is a second predrilled hole (112) having a depth (114) in the rock formation (22) that is adapted for temporarily receiving the anchoring member (110). Depth (114) is generally greater than the length (120) of the anchoring member (110).
Referring back to Figure 7, there is illustrated a second projecting member (1 16) fixed to the back of the rectangular channel adjacent to the first projecting member and disposed downward for reinforcement and to impede device rotation while fixed to the jackleg during the insertion of the ground support member.
Referring to Figure 8, the anchoring member (110) comprises a length (120) of solid steel comprising a first end (122) adapted for inserting into the second predrilled hole (112) and a second threaded end (124) adapted for threaded engagement with the threaded end (106) of the first projecting member (100). The anchoring member has a length (120) less than the depth (114) of the second predrilled hole (112). Once the anchoring member is inserted into the second predrilled hole it is adapted to resist lateral forces resulting from resistance to the ground support member (18) being inserted into the first predrilled hole (20) by the jackleg (14) thrust.
In another example of the invention, the improved ground support member insertion device is used in combination with ajackleg drill. The device comprises means for attaching the device to the jackleg drill and a clutch assembly disposed adjacent to the attaching means. The clutch assembly is adapted for holding a ground support member while it is being inserted into a first drill hole. Anchoring means is disposed opposite the clutch assembly for temporarily anchoring the device in a second hole in the rock formation during insertion of the ground support member.
In another example of the invention there is provided a ground support member insertion kit for use in combination with ajackleg drill. The insertion kit comprises a ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while it is being inserted into a first drill hole and anchoring means disposed opposite the clutch assembly for temporarily anchoring the device in a rock formation during insertion of the ground support member.
Referring to Figure 9 and Figure 10, a there is also provided in the kit is an impact tool (150) that is temporarily fixable to the jackleg drill. The impact tool has a first end (152) and a second end (154). The first end (152) is adapted for connection with the jackleg drill and the second end (154) is adapted for connection with a torquing nut on the end of a reinforcing member. Between the first end and the second end is a flange (156) that is adapted to sit on the end of the jackleg drill so separate the drill from the second end (154). The shaft (158) of the impact tool is manufactured from steel that may have a hollow core (160) and is generally six-sided for better gripping by the jackleg drill chuck.
The second end (154) includes a socket (162) that is adapted to fit over an eight-pointed nut. The socket is removable from the shaft of the impact tool and other sockets for six-point nuts (hexnuts) or four-point nuts (square nuts) may be placed on the end of the shaft. The impact tool is adapted for engaging the proximate end of the ground support member and transmitting percussive and rotational movement to the ground support member during insertion through the resin. Field tests show that the use of this tool on the end of the jackleg drill increases the insertion rate of the reinforcing member through the resin.
In another example of the invention there is provided a system for installing a ground support member comprising a jackleg drill for drilling a first hole for permanently accepting the ground support member and a second hole for temporarily accepting an anchoring member. The jackleg drill is also used to provide thrust to the ground support member during insertion into the first hole. There is further provided a ground support member insertion device temporarily mounted to the jackleg drill for holding the ground support member during insertion into the first hole.
The device acts in cooperation with the anchoring member to stabilize the jackleg during insertion. The system further comprises an impact tool temporarily fixable to the jackleg drill for engaging the proximate end of the ground support member and transmitting percussive and rotational forces from the rock drill to the ground support member during installation.
In another example of the invention, there is a method for inserting a ground support member permanently into a first hole comprising the steps of:
a. Drilling a first hole having a first depth using a rock drill mounted to ajackleg;
b. Inserting a binding resin into the first hole;
c. Drilling a second hole having a second depth using the rock drill wherein the depth of the second hole is less than the depth of the first hole;
d. Installing a ground support member insertion device onto the jackleg drill, wherein the ground support member insertion device comprises:
i. Attaching means for attaching the device to the jackleg drill;
ii. A clutch assembly disposed adjacent to the attaching means for holding a ground support member while permitting movement of the ground support member in a distal direction and preventing movement in a proximate direction; and, iii. Anchoring means disposed opposite the clutch assembly wherein the anchoring member comprises an anchoring member adapted for temporarily anchoring the device in the second hole during insertion of the ground support member;
e. Temporarily fixing the anchoring member to the ground support member insertion device;
f. Maneuvering the jackleg drill so that the anchoring member is inserted into the second hold and the ground support member insertion device is poised below the first hole;
g. Inserting a ground support member into the clutch assembly, wherein the ground support member comprises a distal end for insertion into the first hole and a proximate end adapted to receive thrust from the jackleg drill, and wherein the ground support member is held stationary within the clutch until a first thrust is applied from the jackleg drill;
h. Applying a first thrust from the jackleg drill to the proximate end of the ground support member thereby forcing it through the clutch and into the first hole a first distance so that the distal end of the ground support member engages the binding resin;
i. Withdrawing the jackleg drill a second distance thereby removing thrust from the ground support member and engaging the clutch so that the ground support member is held stationary;
j. Applying a second thrust to the proximate end of the ground support member in order to move it a second distance into the first hole;
k. Repeating steps j and k until the ground support member is in a desired location;
1. Removing the ground support member insertion device from the jackleg drill;
m. Installing an impact tool on the drill whereby the distal end of the impact tool engages the proximate end of the ground support member thereby permitting the transmission of percussive and rotational forces from the rock drill to the ground support member until a desired tension is achieved within the ground support member.
Although the description above contains much specificity, these should not be construed as limiting the scope of the invention but as merely providing examples of the invention. Thus the scope of the invention should be determined by the appended claims and their legal equivalents.
i. withdrawing the jackleg drill a second distance thereby removing thrust from the ground support member and engaging the clutch so that the grounds support member is held stationary;
j. applying a second thrust to the proximate end of the ground support member in order to move it a second distance into the first hole;
k. repeating steps h to j until the ground support member is in a desired location;
I. allowing the resin to set in a binding relationship with the ground support member;
m. removing the ground support member insertion device from the jackleg drill;
n. installing an impact tool on the jackleg drill whereby the distal end of the impact tool engages the proximate end of the ground support member by engagement means thereby permitting the transmission of percussive and rotational forces from the jackleg drill to the ground support member until a desired tension is achieved within the ground support member.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic drawing of a jackleg leg drill and invention in a mine.
Figure 2 is a schematic drawing of the top of one example of the invention.
Figure 3 is the same figure as Figure 2.
Figure 4 is a schematic side view of a reinforcing member in one example of the clutch assembly.
Figure 5 is another schematic view of a reinforcing member in one example of the clutch assembly.
Figure 6 is a bottom view of one example of the invention.
Figure 7 is a side view of the one example of the invention.
Figure 8 is a view of one example of the anchoring member of the invention.
Figure 9 is a view of one example of the impact tool of the invention.
DETAILED DESCRIPTION
Referring to Figure 1, there is shown a schematic view of one example of our invention being an improved ground support member insertion device (10) comprising means (24) for attaching the device to a jackleg drill (14). A clutch assembly (16) is disposed adjacent to the attaching means (24) and separated from the attaching means by a rectangular spacing member (26) adapted to provide proper spacing between the drill and the clutch assembly. The clutch assembly (16) is adapted for holding and guiding a ground support member (18) insertion while it is being inserted into a first drill hole (20) within a rock body (22). The jackleg drill is also called a pushleg drill and is a pneumatic or hydraulic assisted device used to provide thrust to the drill bit in drilling operations.
Typically the jackleg drill will be installed upon a tripod (23) support or some other type of support for stability.
Referring to Figure 1 and Figure 2, in another example (10) of the invention there is illustrated schematically in a top view other elements of the invention including anchoring means (24) disposed opposite the clutch assembly (16). The anchoring means are adapted for temporarily anchoring the device (10) in the rock body (22) during insertion of the ground support member (18) and for attaching the device (10) to the jackleg drill.
Rectangular channel member (26) is welded (27) between the clutch assembly (16) and the anchoring means (24). The rectangular channel member comprises a front (28), a back (30), a first side (32) and a second side (34). The rectangular channel member provides spacing between the clutch assembly (16) and the end (36) of the jackleg drill (14).
Referring now to Figure 3, which is identical to Figure 2, the clutch assembly (16) comprises a rectangular housing (40) welded (27) to the front (28) of the rectangular channel member (26). Within the rectangular housing is housed a roller (42). The roller is adapted for a frictional rolling engagement with the ground support member (18) as more fully explained below.
Referring to Figure 4 and Figure 5, the roller (42) is eccentrically mounted on an axle (44) within the clutch housing (16). The axle (44) provides for a limited pivoting movement between a first engaged position (46) when the roller is acting to prevent the ground support member (18) from moving backwards (47) by moving in a clockwise (49) rotation about the axis in order to pinchingly engage the ground support member (18) within the groove (51).
Referring to Figure 5, there is a second disengaged position (48). In the disengaged position (48) the roller (42) is rotated counter clock-wise (54) about the axle (44) so that it disengages the ground support member 5(18) and permits one-way movement (56) of the ground support member towards the first hole. The surface (50) of the roller is always in a frictional engagement with the grounds support member (18) while it is moving so that should forces of gravity act on the ground support member the roller will automatically engage into its engagement position thereby locking the ground support member in place. The surface (50) of the roller is adapted for frictional engagement with a steel ground support member and in one example of the invention it may be knurled.
Other types of surface patterns are also possible to obtain the same gripping effect between the surface of the roller and the surface of the ground support member.
Referring to Figures 1 to 6, the ground support member (18) is inserted between the roller (42) and the groove (51) in the inside surface (84) of the front plate (70) and cooperate in a frictional engagement, so that when the ground support member (18) receives thrust from the jackleg drill (14) it is pushed towards the first hole (20) and the roller pivots upwards (54) in a releasing action permitting frictional movement of the ground support member through the housing (16). When the thrust is removed, gravity (47) will pull the ground support member down thereby permitting the roller to pivot downwards (49) and into a position wherein it acts in a pinching combination with the groove (51) to generate a pinch force capable of holding the ground support member stationary against the force of gravity.
Still referring to Figure 6, there is shown a bottom view of the ground support member insertion device (10). The rectangular housing (16) comprises an open bottom (60), a partially closed top (62 Figure 3), a first side (64), a second side (66), a back (68) and a front (70). The open bottom (60) facilitates insertion of the ground support member (18) into the groove (5 1) in front of the roller (42). The partially closed top (62) comprises a top plate (72 Figure 3) adapted to permit passage of the ground support member (18) through the rectangular housing (16) while impeding debris from entering the rectangular housing by way of the partially closed top. The first side (64) is at least partially enclosed by a first side plate (74). The second side (66) is at least partially enclosed by a second side plate (76). The first side plate (74) and the second side plate (76) are adapted to guide the movement of the roller (42) within the rectangular housing (16). The front (70) is enclosed by a front plate (80) attached to at least one of the first and second side plates. The front plate (80) has a flat outside surface (82) and an inside surface (84) having groove (51) adapted for frictional siding engagement with the ground support member (18) as it passes through the rectangular housing (16).
The back (68) is enclosed by a back plate (86) that is attached by welding (27) to the front (28) of the rectangular channel (26). The first (74) and second (76) side plates comprise respective first (90) and second (92) apertures disposed opposite to each other for mounting the axle (44) of the roller (42). The first and second side plates further comprise respective third (94) and fourth (96) apertures disposed opposite to each other for mounting a tensionable reinforcing member (98) that also acts as a bottom roller stop. The tensionable reinforcing member (98) is further adapted to ensure parallel alignment of the first and second side plates.
Referring to Figure 7, there is shown another example of the ground support member insertion device in a first side view. The anchoring means (24) comprises a first projecting member (100) fixed to the back (30) of the rectangular channel (26). The first projecting member is a single length of steel rod. The first projecting member (100) has a first end (102) disposed downward (104) for attachment to the jackleg drill.
The first projecting member has a second threaded end (106) disposed upward (108) for threaded attachment to an anchoring member (110) further described in Figure 8.
Referring back to Figure 1, there is a second predrilled hole (112) having a depth (114) in the rock formation (22) that is adapted for temporarily receiving the anchoring member (110). Depth (114) is generally greater than the length (120) of the anchoring member (110).
Referring back to Figure 7, there is illustrated a second projecting member (1 16) fixed to the back of the rectangular channel adjacent to the first projecting member and disposed downward for reinforcement and to impede device rotation while fixed to the jackleg during the insertion of the ground support member.
Referring to Figure 8, the anchoring member (110) comprises a length (120) of solid steel comprising a first end (122) adapted for inserting into the second predrilled hole (112) and a second threaded end (124) adapted for threaded engagement with the threaded end (106) of the first projecting member (100). The anchoring member has a length (120) less than the depth (114) of the second predrilled hole (112). Once the anchoring member is inserted into the second predrilled hole it is adapted to resist lateral forces resulting from resistance to the ground support member (18) being inserted into the first predrilled hole (20) by the jackleg (14) thrust.
In another example of the invention, the improved ground support member insertion device is used in combination with ajackleg drill. The device comprises means for attaching the device to the jackleg drill and a clutch assembly disposed adjacent to the attaching means. The clutch assembly is adapted for holding a ground support member while it is being inserted into a first drill hole. Anchoring means is disposed opposite the clutch assembly for temporarily anchoring the device in a second hole in the rock formation during insertion of the ground support member.
In another example of the invention there is provided a ground support member insertion kit for use in combination with ajackleg drill. The insertion kit comprises a ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while it is being inserted into a first drill hole and anchoring means disposed opposite the clutch assembly for temporarily anchoring the device in a rock formation during insertion of the ground support member.
Referring to Figure 9 and Figure 10, a there is also provided in the kit is an impact tool (150) that is temporarily fixable to the jackleg drill. The impact tool has a first end (152) and a second end (154). The first end (152) is adapted for connection with the jackleg drill and the second end (154) is adapted for connection with a torquing nut on the end of a reinforcing member. Between the first end and the second end is a flange (156) that is adapted to sit on the end of the jackleg drill so separate the drill from the second end (154). The shaft (158) of the impact tool is manufactured from steel that may have a hollow core (160) and is generally six-sided for better gripping by the jackleg drill chuck.
The second end (154) includes a socket (162) that is adapted to fit over an eight-pointed nut. The socket is removable from the shaft of the impact tool and other sockets for six-point nuts (hexnuts) or four-point nuts (square nuts) may be placed on the end of the shaft. The impact tool is adapted for engaging the proximate end of the ground support member and transmitting percussive and rotational movement to the ground support member during insertion through the resin. Field tests show that the use of this tool on the end of the jackleg drill increases the insertion rate of the reinforcing member through the resin.
In another example of the invention there is provided a system for installing a ground support member comprising a jackleg drill for drilling a first hole for permanently accepting the ground support member and a second hole for temporarily accepting an anchoring member. The jackleg drill is also used to provide thrust to the ground support member during insertion into the first hole. There is further provided a ground support member insertion device temporarily mounted to the jackleg drill for holding the ground support member during insertion into the first hole.
The device acts in cooperation with the anchoring member to stabilize the jackleg during insertion. The system further comprises an impact tool temporarily fixable to the jackleg drill for engaging the proximate end of the ground support member and transmitting percussive and rotational forces from the rock drill to the ground support member during installation.
In another example of the invention, there is a method for inserting a ground support member permanently into a first hole comprising the steps of:
a. Drilling a first hole having a first depth using a rock drill mounted to ajackleg;
b. Inserting a binding resin into the first hole;
c. Drilling a second hole having a second depth using the rock drill wherein the depth of the second hole is less than the depth of the first hole;
d. Installing a ground support member insertion device onto the jackleg drill, wherein the ground support member insertion device comprises:
i. Attaching means for attaching the device to the jackleg drill;
ii. A clutch assembly disposed adjacent to the attaching means for holding a ground support member while permitting movement of the ground support member in a distal direction and preventing movement in a proximate direction; and, iii. Anchoring means disposed opposite the clutch assembly wherein the anchoring member comprises an anchoring member adapted for temporarily anchoring the device in the second hole during insertion of the ground support member;
e. Temporarily fixing the anchoring member to the ground support member insertion device;
f. Maneuvering the jackleg drill so that the anchoring member is inserted into the second hold and the ground support member insertion device is poised below the first hole;
g. Inserting a ground support member into the clutch assembly, wherein the ground support member comprises a distal end for insertion into the first hole and a proximate end adapted to receive thrust from the jackleg drill, and wherein the ground support member is held stationary within the clutch until a first thrust is applied from the jackleg drill;
h. Applying a first thrust from the jackleg drill to the proximate end of the ground support member thereby forcing it through the clutch and into the first hole a first distance so that the distal end of the ground support member engages the binding resin;
i. Withdrawing the jackleg drill a second distance thereby removing thrust from the ground support member and engaging the clutch so that the ground support member is held stationary;
j. Applying a second thrust to the proximate end of the ground support member in order to move it a second distance into the first hole;
k. Repeating steps j and k until the ground support member is in a desired location;
1. Removing the ground support member insertion device from the jackleg drill;
m. Installing an impact tool on the drill whereby the distal end of the impact tool engages the proximate end of the ground support member thereby permitting the transmission of percussive and rotational forces from the rock drill to the ground support member until a desired tension is achieved within the ground support member.
Although the description above contains much specificity, these should not be construed as limiting the scope of the invention but as merely providing examples of the invention. Thus the scope of the invention should be determined by the appended claims and their legal equivalents.
Claims (27)
1. An improved ground support member insertion device comprising:
a. means for attaching said device to a jackleg;
b. a clutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding a ground support member while it is being inserted into a first drill hole; and c. anchoring means disposed opposite the clutch assembly, said anchoring means adapted for temporarily anchoring the device for stabilization in a rock formation during insertion of said ground support member.
a. means for attaching said device to a jackleg;
b. a clutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding a ground support member while it is being inserted into a first drill hole; and c. anchoring means disposed opposite the clutch assembly, said anchoring means adapted for temporarily anchoring the device for stabilization in a rock formation during insertion of said ground support member.
2. The device of claim 1 wherein said attaching means is separated from the clutch assembly by a rectangular channel welded between the clutch assembly and the anchoring means.
3. The device of claim 2 wherein said rectangular channel further comprises a front, a back, a first side and a second side.
4. The device of claim 1 wherein the clutch assembly comprises:
a. a rectangular housing welded to said front of the rectangular channel; and b. a roller housed within said rectangular housing.
a. a rectangular housing welded to said front of the rectangular channel; and b. a roller housed within said rectangular housing.
5. The device of claim 4 wherein said roller is adapted for frictional rolling engagement with the ground support member.
6. The device of claim 5 wherein the roller is eccentrically mounted on an axle for limited pivoting movement about said axle.
7. The device of claim 6 wherein the rectangular housing comprises:
a. an open bottom;
b. a partially closed top;
c. a first side;
d. a second side;
e. a back; and f. a front.
a. an open bottom;
b. a partially closed top;
c. a first side;
d. a second side;
e. a back; and f. a front.
8. The device of claim 7 wherein said open bottom facilitates insertion of the ground support member into the device.
9. The device of claim 8 wherein said partially closed top comprises a top plate adapted to permit passage of the ground support member through the rectangular housing while impeding debris from entering the rectangular housing by way of the partially closed top.
10. The device of claim 9 wherein said first side is at least partially enclosed by a first side plate.
11. The device of claim 10 wherein said second side is at least partially enclosed by a second side plate.
12. The device of claim 11 wherein said first side plate and said second side plate are adapted to guide the movement of the roller within the rectangular housing.
13. The device of claim 12 wherein said front is enclosed by a front plate attached to at least one of the first and second side plates.
14. The device of claim 13 wherein the front plate has a flat outside surface and an inside surface having a groove adapted for frictional siding engagement with the ground support member as it passes through the housing.
15. The device of claim 14 wherein said back is enclosed by a back plate, and wherein said back plate is attached to the front of the rectangular channel.
16. The device of claim 15 wherein the first and second side plates comprise respective first and second apertures disposed opposite to each other for mounting said axis of the roller.
17. The device of claim 16 wherein the first and second side plates further comprise respective third and fourth apertures disposed opposite to each other for mounting a tensionable reinforcing member, and wherein said member acts as a bottom stop for the roller.
18. The device of claim 17 wherein said tensionable reinforcing member is further adapted to ensure parallel alignment of the first and second side plates.
19. The device of claim 2 wherein the anchoring means comprises:
a. a first projecting member fixed to the back of the rectangular channel, said first projecting member having a first end disposed downward for attachment to said jackleg and a second threaded end disposed upward for threaded attachment to;
b. an anchoring member for insertion into;
c. a second predrilled hole having a depth in said rock formation and adapted for temporarily receiving said anchoring member; and d. a second projecting member fixed to the back of the rectangular channel adjacent to said first projecting member and disposed downward for reinforcement and to impede device rotation during the insertion of the ground support member.
a. a first projecting member fixed to the back of the rectangular channel, said first projecting member having a first end disposed downward for attachment to said jackleg and a second threaded end disposed upward for threaded attachment to;
b. an anchoring member for insertion into;
c. a second predrilled hole having a depth in said rock formation and adapted for temporarily receiving said anchoring member; and d. a second projecting member fixed to the back of the rectangular channel adjacent to said first projecting member and disposed downward for reinforcement and to impede device rotation during the insertion of the ground support member.
20. The device of claim 19 wherein the anchoring member comprises:
a. a first end adapted for inserting into said second predrilled hole; and b. a second threaded end adapted for threaded engagement with the threaded second end of the first projecting member.
a. a first end adapted for inserting into said second predrilled hole; and b. a second threaded end adapted for threaded engagement with the threaded second end of the first projecting member.
21. The device of claim 20 wherein the anchoring member has a length less than said depth of the second predrilled hole.
22. The device of claim 21 wherein the anchoring member is adapted to resist lateral forces resulting from resistance to the ground support member being inserted into said first predrilled hole.
23. The device of claim 22 wherein the ground support member is inserted between the roller member and said groove in the inside surface of the front plate act in frictional engagement, so that when the ground support member receive a thrust from the jackleg it is pushed towards the first hole and the roller pivots upwards in a releasing action permitting frictional movement of the ground support member, and so that when the thrust is removed, gravity will pull the ground support member down thereby permitting the roller to pivot downwards and into a position wherein it acts in a pinching combination with the groove to generate a pinch force capable of holding the ground support member stationary against the force of gravity.
24. An improved ground support member insertion device used in combination with a jackleg drill, said device comprising:
a. attaching means for attaching said device to said jackleg drill;
b. a clutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding a ground support member while it is being inserted into a first drill hole;
c. anchoring means disposed opposite the clutch assembly, said anchoring means adapted for temporarily anchoring the device in a rock formation during insertion of said ground support member.
a. attaching means for attaching said device to said jackleg drill;
b. a clutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding a ground support member while it is being inserted into a first drill hole;
c. anchoring means disposed opposite the clutch assembly, said anchoring means adapted for temporarily anchoring the device in a rock formation during insertion of said ground support member.
25. A ground support member insertion kit for use in combination with a jackleg drill, said insertion kit comprising:
a. a ground support member insertion device comprising:
attaching means for attaching said device to a jackleg drill;
a dutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding the ground support member while it is being inserted into a first drill hole that has been pre-loaded with resin;
and iii. anchoring means disposed opposite the clutch assembly, said anchoring means adapted for temporarily anchoring the device in a rock formation during insertion of said ground support member; and b. an impact tool temporarily fixable to the jackleg drill, said impact tool adapted for engaging the proximate end of the ground support member by engagement means and transmitting percussive and rotational movement to the ground support member during insertion into the resin.
a. a ground support member insertion device comprising:
attaching means for attaching said device to a jackleg drill;
a dutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding the ground support member while it is being inserted into a first drill hole that has been pre-loaded with resin;
and iii. anchoring means disposed opposite the clutch assembly, said anchoring means adapted for temporarily anchoring the device in a rock formation during insertion of said ground support member; and b. an impact tool temporarily fixable to the jackleg drill, said impact tool adapted for engaging the proximate end of the ground support member by engagement means and transmitting percussive and rotational movement to the ground support member during insertion into the resin.
26. A system for installing a ground support member with resin comprising:
a. a rock drill for drilling a first hole for permanently accepting said ground support member and resin in combination and a second hole for temporarily accepting an anchoring member for stabilization;
b. a jackleg drill for mounting said rock drill and for providing thrust to the ground support member during insertion into said first hole and resin;
c. a ground support member insertion device temporarily mounted to the jackleg drill for holding the ground support member during insertion into the first hole, wherein said device acts in cooperation with said anchoring member to stabilize the jackleg drill during insertion; and d. an impact tool temporarily fixable to the rock drill, said impact tool adapted for engaging the proximate end of the ground support member by engagement means and transmitting percussive and rotational forces from the rock drill to the ground support member during insertion into the resin and tensioning of the ground support member.
a. a rock drill for drilling a first hole for permanently accepting said ground support member and resin in combination and a second hole for temporarily accepting an anchoring member for stabilization;
b. a jackleg drill for mounting said rock drill and for providing thrust to the ground support member during insertion into said first hole and resin;
c. a ground support member insertion device temporarily mounted to the jackleg drill for holding the ground support member during insertion into the first hole, wherein said device acts in cooperation with said anchoring member to stabilize the jackleg drill during insertion; and d. an impact tool temporarily fixable to the rock drill, said impact tool adapted for engaging the proximate end of the ground support member by engagement means and transmitting percussive and rotational forces from the rock drill to the ground support member during insertion into the resin and tensioning of the ground support member.
27. A method for inserting a ground support member permanently into a first hole filled with resin comprising the steps of:
a. drilling said first hole having a first depth using a jackleg drill;
b. inserting a bonding agent including resin into the first hole;
c. drilling a second hole having a second depth using said jackleg drill wherein said second depth is less than said first depth;
d. installing a ground support member insertion device onto the jackleg drill, said ground support member insertion device comprising:
attaching means for attaching said device to the jackleg drill;
a clutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding a ground support member while permitting movement of the ground support member in a distal direction and preventing movement in a proximate direction; and iii. anchoring means disposed opposite the clutch assembly, said anchoring means comprising an anchoring member adapted for temporarily anchoring the device in said second hole during insertion of said ground support member for stability;
e. temporarily fixing said anchoring member to the ground support member insertion device;
f. maneuvering the jackleg drill so that the anchoring member is inserted into the second hold and the ground support member insertion device is poised below the first hole;
g. inserting the ground support member into said clutch assembly, wherein said ground support member comprises a distal end for insertion into the first hole and a proximate end adapted to receive thrust from the jackleg drill, and wherein the ground support member is held stationary within the clutch until a first thrust is applied from the jackleg drill;
h. applying said first thrust from the jackleg drill to the proximate end of the ground support member thereby forcing it through the clutch and into the first hole a first distance so that the distal end of the ground support member engages said binding resin;
i. withdrawing the jackleg drill a second distance thereby removing thrust from the ground support member and engaging the clutch so that the grounds support member is held stationary;
j. applying a second thrust to the proximate end of the ground support member in order to move it said second distance into the first hole;
k. repeating steps h to j until the ground support member is in a desired location;
I. allowing the resin to set in a binding relationship with the ground support member;
m. removing the ground support member insertion device from the jackleg drill;
n. installing an impact tool on the jackleg drill whereby the distal end of said impact tool engages the proximate end of the ground support member by engagement means thereby permitting the transmission of percussive and rotational forces from the jackleg drill to the ground support member until a desired tension is achieved within the ground support member.
a. drilling said first hole having a first depth using a jackleg drill;
b. inserting a bonding agent including resin into the first hole;
c. drilling a second hole having a second depth using said jackleg drill wherein said second depth is less than said first depth;
d. installing a ground support member insertion device onto the jackleg drill, said ground support member insertion device comprising:
attaching means for attaching said device to the jackleg drill;
a clutch assembly disposed adjacent to said attaching means, said clutch assembly adapted for holding a ground support member while permitting movement of the ground support member in a distal direction and preventing movement in a proximate direction; and iii. anchoring means disposed opposite the clutch assembly, said anchoring means comprising an anchoring member adapted for temporarily anchoring the device in said second hole during insertion of said ground support member for stability;
e. temporarily fixing said anchoring member to the ground support member insertion device;
f. maneuvering the jackleg drill so that the anchoring member is inserted into the second hold and the ground support member insertion device is poised below the first hole;
g. inserting the ground support member into said clutch assembly, wherein said ground support member comprises a distal end for insertion into the first hole and a proximate end adapted to receive thrust from the jackleg drill, and wherein the ground support member is held stationary within the clutch until a first thrust is applied from the jackleg drill;
h. applying said first thrust from the jackleg drill to the proximate end of the ground support member thereby forcing it through the clutch and into the first hole a first distance so that the distal end of the ground support member engages said binding resin;
i. withdrawing the jackleg drill a second distance thereby removing thrust from the ground support member and engaging the clutch so that the grounds support member is held stationary;
j. applying a second thrust to the proximate end of the ground support member in order to move it said second distance into the first hole;
k. repeating steps h to j until the ground support member is in a desired location;
I. allowing the resin to set in a binding relationship with the ground support member;
m. removing the ground support member insertion device from the jackleg drill;
n. installing an impact tool on the jackleg drill whereby the distal end of said impact tool engages the proximate end of the ground support member by engagement means thereby permitting the transmission of percussive and rotational forces from the jackleg drill to the ground support member until a desired tension is achieved within the ground support member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2590589A CA2590589C (en) | 2007-05-18 | 2007-05-18 | Improved rebar insertion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2590589A CA2590589C (en) | 2007-05-18 | 2007-05-18 | Improved rebar insertion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2590589A1 CA2590589A1 (en) | 2008-11-18 |
| CA2590589C true CA2590589C (en) | 2014-12-02 |
Family
ID=40030421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2590589A Active CA2590589C (en) | 2007-05-18 | 2007-05-18 | Improved rebar insertion device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2590589C (en) |
-
2007
- 2007-05-18 CA CA2590589A patent/CA2590589C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2590589A1 (en) | 2008-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7712838B2 (en) | Ground support insertion tool | |
| CA2733829C (en) | Rock anchor cable | |
| US20060198706A1 (en) | Torque down pile substructure support system | |
| AU667642B2 (en) | Multiple cable rock anchor system | |
| CA2887473C (en) | A machine and method for installing rock bolts | |
| DE3410100A1 (en) | Bolt-setting apparatus | |
| CA2590589C (en) | Improved rebar insertion device | |
| WO2009023889A1 (en) | Armature boring and setting device | |
| US6030151A (en) | Method for reinforcing rock with a tendon | |
| US7547161B2 (en) | Apparatus for positioning anchor bolts and method of using same | |
| AU2012267199A1 (en) | Improvements in self-drilling rock bolts | |
| DE2912781B2 (en) | Device for supporting pipes laid on the seabed in the region of seabed depressions and a method for attaching this device | |
| WO2013104019A1 (en) | A combination tool for installing and tensioning a cable bolt | |
| DE19638464A1 (en) | Insert end for a drill drive | |
| CN109441514B (en) | Wing type anchor rod | |
| US4448264A (en) | Ground rod driving pole | |
| CN110017101B (en) | Drilling inclination adjustable drilling method without drilling tower | |
| AT509159A1 (en) | METHOD AND DEVICE FOR DRILLING, IN PARTICULAR FITTING OR TORQUE DRILLING, A HOLE IN GROUND OR ROCK MATERIAL AND FOR FORMING AN ANCHORAGE IN THE HOLE | |
| AU2007216933A1 (en) | A rock bolt | |
| US6435778B1 (en) | Cable truss system and related method of installation | |
| US4415047A (en) | Downhole case driving apparatus for impact drills | |
| CN213897129U (en) | Soil nail support slip casting end cap for building engineering | |
| EP3530877A1 (en) | Rock bolt and method for drilling and reinforcing material | |
| CN220267621U (en) | Eccentric down-the-hole hammer | |
| CA2460497C (en) | Rebar insertion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |