CA1192754A - Method for rock bolting by using a stranded cable and equipment for carrying out rock bolting - Google Patents
Method for rock bolting by using a stranded cable and equipment for carrying out rock boltingInfo
- Publication number
- CA1192754A CA1192754A CA000438638A CA438638A CA1192754A CA 1192754 A CA1192754 A CA 1192754A CA 000438638 A CA000438638 A CA 000438638A CA 438638 A CA438638 A CA 438638A CA 1192754 A CA1192754 A CA 1192754A
- Authority
- CA
- Canada
- Prior art keywords
- feed pipe
- stranded cable
- sealing ring
- equipment
- seal
- 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.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Abstract
Abstract of the Disclosure Method of rock bolting by means of a continuous stranded cable, according to which method, a feed pipe (7) is shifted to a position facing a hole (24) drilled into a rock, a stranded cable (16) being fed through the said feed pipe into the drill hole, whereupon the feed pipe is pressed sealingly against the drill hole, a cementing agent is fed throug the feed pipe into the drill hole, and finally the feed pipe is displaced from the drill hole and the stranded cable is cut off. In order to seal the space between the stranded calbe and the feed pipe, a seal (20) provided between the cable and the feed pipe is compressed axially 50 as to con-strict the seal radially around the stranded cable (16) into contact with the circumferential surface of the stranded cable. In the rock bolting equipment intended for carrying out the method, the seal (20) between the stranded cable and the feed pipe is an elastically compressible sealing ring forming a passage hole which is constricted radially as the sealing ring is compressed axially. The equipment is provided with an operating mechanism for axial compressing said sealing ring.
Description
75~
The present invention is concerned wlth a method of rock bolting by means of a continuousstra~ded cable, in accordance with which method, - a feed pipe is shifted to a position facing a hole drilled into a rock, - a stranded cable is fed through the feed pipe into the drill hole, - the feed pipe is pressed against the drill hole for sealing the feed pipe in relation to the rock, - the stranded cable is sealed by means of a seal in relation to the feed pipe, - a cementing agent is fed through the feed pipe into the drill hole, and - the feed pipe is displaced from the drill hole and the stranded calbe is cut off.
When rock bolting is performed by means of a stranded cable, difficulties encountered are how to make the cemell~ing agent used for fixing the bolt in the drill hole remain in the drill hole, on one hand, and how to make the stranded cable inserted into the drill hole xemain in position in the drill hole until the cementing agent has hardened sufficientlyt on the other hand.
From U.S, Patent Specification 4,289,427 a bolting equipment is known in which 3 to 8 hollow-core filaments, e.g. of fibre-glass, are used as a stranded cable. The equipment is provided with a rotating device which includes a rotor disc, through which the stranded cable runs when it is being fed into the drill hole. The shape of the passage hole i?l the rotor disc corresponds to the cross-sectional form of the stranded cable so that the rotor disc is in rot~ting engagement with the stranded cable. Th~ end plate of the rotating de~ice is 7~i~
provided with a seal rin~, by means of which the rotating device i5 sealed against the rock, and the end plate is provided with necessary feed channels for feeding the cementing ayent into the drill hole.
When the strande~ cable is being inserted into the drill hole, the cable is, at the same time, rotated by rneans of the rotor disc, which additionally prevents acciden-tal gliding of the stranded cable out of the drill hole.
The bolting equipment in accordance with said U.S. Patent requires a hollow-core stranded cable of a special construction in order that the air in the drill hole could escape out of the hole. Another function of the rotor disc is to act as a seal around the stranded cable, and the rotor disc itself is sealed against the frame of the rotating device and against its end plate.
Inadequate sealing may, however, occur between the passage hole in the rotor disc and the stranded cable, in particular if the rotor disc is worn and does not follow the shape of the stranded cable closely, because the rotor disc consists of a rigid piece.
The objec~ of the present invention is to provide a method that avoids the above drawbacks and that permits sealing and keeping in position of the stranded cable in a simple way when a less expensive s-tandard cable of ordinary construction is used as the stranded cable~
This objective is achieved by means of a method in accor-dance with the invention, which is characterized in that the seal is compressed axially so as to constrict the seal radially around the stranded cable into contact with the circumferential surface of the stranded cable.
The invention is based on the idea that the seal-ing and keeping in position of the stranded cable is carried out by means of an axial movement, by which a
The present invention is concerned wlth a method of rock bolting by means of a continuousstra~ded cable, in accordance with which method, - a feed pipe is shifted to a position facing a hole drilled into a rock, - a stranded cable is fed through the feed pipe into the drill hole, - the feed pipe is pressed against the drill hole for sealing the feed pipe in relation to the rock, - the stranded cable is sealed by means of a seal in relation to the feed pipe, - a cementing agent is fed through the feed pipe into the drill hole, and - the feed pipe is displaced from the drill hole and the stranded calbe is cut off.
When rock bolting is performed by means of a stranded cable, difficulties encountered are how to make the cemell~ing agent used for fixing the bolt in the drill hole remain in the drill hole, on one hand, and how to make the stranded cable inserted into the drill hole xemain in position in the drill hole until the cementing agent has hardened sufficientlyt on the other hand.
From U.S, Patent Specification 4,289,427 a bolting equipment is known in which 3 to 8 hollow-core filaments, e.g. of fibre-glass, are used as a stranded cable. The equipment is provided with a rotating device which includes a rotor disc, through which the stranded cable runs when it is being fed into the drill hole. The shape of the passage hole i?l the rotor disc corresponds to the cross-sectional form of the stranded cable so that the rotor disc is in rot~ting engagement with the stranded cable. Th~ end plate of the rotating de~ice is 7~i~
provided with a seal rin~, by means of which the rotating device i5 sealed against the rock, and the end plate is provided with necessary feed channels for feeding the cementing ayent into the drill hole.
When the strande~ cable is being inserted into the drill hole, the cable is, at the same time, rotated by rneans of the rotor disc, which additionally prevents acciden-tal gliding of the stranded cable out of the drill hole.
The bolting equipment in accordance with said U.S. Patent requires a hollow-core stranded cable of a special construction in order that the air in the drill hole could escape out of the hole. Another function of the rotor disc is to act as a seal around the stranded cable, and the rotor disc itself is sealed against the frame of the rotating device and against its end plate.
Inadequate sealing may, however, occur between the passage hole in the rotor disc and the stranded cable, in particular if the rotor disc is worn and does not follow the shape of the stranded cable closely, because the rotor disc consists of a rigid piece.
The objec~ of the present invention is to provide a method that avoids the above drawbacks and that permits sealing and keeping in position of the stranded cable in a simple way when a less expensive s-tandard cable of ordinary construction is used as the stranded cable~
This objective is achieved by means of a method in accor-dance with the invention, which is characterized in that the seal is compressed axially so as to constrict the seal radially around the stranded cable into contact with the circumferential surface of the stranded cable.
The invention is based on the idea that the seal-ing and keeping in position of the stranded cable is carried out by means of an axial movement, by which a
2~5~L
radial constriction of the seal of elastic material around the stranded cable is achieved so that, when pressed ayainst the stranded cable, the seal both seals the stranded cable and keeps it reliably in position during the feeding and hardening of the cementing agent. The mode of sealing based on an elasticall~
compressible seal is not sensitive to wear and can adapt itself to variations in diameter possibl~ occur-ing in stranded cables.
The invention is also concerned with equipment for rock b~lting by means of a continuous stranded cable. The equipment is characterized in ~hat is stated in claim 3. The equipment in accordance with the inven-tion is characterized in a constructionally and operationally simple realization of the sealing opera-tion, because the axial movement required by the axial compressing of the seal can be combined with such an axial movement which anyhow must be performed in rock bolting. The combining of the movements can be carried out in several different ways. It is characteristic of all the embodiments that the sealing ring is compressed axially and, owing to its elasticity, at the same time, radially against the stranded cable.
The invention will be described in more detail below with reference to the attached drawings, wherein Figure 1 is a side view of a preferred embodi-ment of a bolting equipment in accordance with the invention, Figures 2 and 3 are enlarged axial sectional views of the front end of the feed pipe of the bolting equipment in two different operational positions, and Figures 4 to 7 are axial sectional views of alternative emboidments of the front end of the feed pipe.
~92~5~L
The rock bolting equipment shown in Fig. 1 of the drawings comprises a transfer beam 2 supported b~
a cradle 1, which beam is displaceable longitudinally relative the cradle on glide shoes 3 by means of a cylinder 4, which acts between the transfer beam and the cradle. The trans~er beam supports a feeding mechanism 5 for the stranded cable, which mechanism may be, e.g., of the prior-art construction described in ~.S. Patent Specification 4,155,409 and which is displaceable longi-tudinally on the transfer beam by means of an adjust-mentcylinder 6, which acts hetween the transfer beam and the feeding mechanism.
A feed pipe 7 projects from the feeding mechanism in parallel with the transfer beam, the front part of the said feed pipe being supported on a sledge 9 by means of a support 8. The sledge 9 is movable longitudi-nallY on the transfer beam by means of a displacement cylinder 10, which acts between the sledge and the feeding mechanism.
The feed pipe is in Figures 1 to 6 telescopic and comprises an outer guide pipe 11 and an inner guide pipe 12, which can move axially realtive each other. To the front end of the outer guide pipe, a tip piece 13 has been attached, which is provided with a rubber tip 14. The tip piece is provided with an axial hole 15 which is intended for the passage of the stranded cable 16 and from which a channel 17 is branched for a cemen-ting agent and a channel 18 for an air hose 19.
In the embodiment shown in Figures 1 to 3, the inner guide pipe 12 of the feed pipe is attached to the support 8 of the sledgP 9. Inside the outer guide pipe, a sleeve-shaped sealing rubber 20 is fitted between the tip piece and an annuIar pressing means 21 attached to the end of the inner guide pipe.
The equipment i.s additionally provide~ with a cut~er 22, which is mounted pivotably on the trans~er beam for cutting the stranded cahle.
The rock bolting is per~ormed as follows:
~ y positioning the transfer beam 1, the feed pipe 7 is aligned so as to be placed in line with the hole 24 drilled into the rock 23. By displacing the feeding mechanism 5 by means of the cylinder 6 and the sle~ge 9 by means of the cylinder 10, the tip piece 13 of the feed pipe is guided axially so that it faces the drill hole, and the tip piece is pushed some distance into the hole (in the present case, into a protective pipe 25 fitted in the holel in order to exclude lateral movement, Fig. 2. Hereinafter, the stranded cable 16 is fed from a reel 26 by means of the feeding mechanism through the guide pipes, the sealing rubber and the tip piece into the drill hole. The end of the air-exhaust hose 19 is attached to the end of the stranded cable, whereby the cable pulls the hose along into the hole.
After the ~eeding of the stranded cable has been carried out, the feeding o~ the cementing agent begins.
First, the feed pipe is pushed forwards by means of the displacement cylinder 10 so that the conical rubber tip 14 is pressed tightly against the end edge of the pro-tective pipe. The pushing is continued further by means o~ the displacement cylinder, whereby, when the rubber tip is compressed, the movement of the outer guide pipe 11 becomes more difficult. Thereby the inner guide pipe 12, upon which the pushing force acts~ is displaced axially forwards relative the outer guide pipe and com-presses the sleeve-shaped sealing rubber 20 placed around the stranded cable axially. As a result of this axial compression, the sealing rubber is pressed radially against the stranded cable and, by the e~fect o adequate compression, seals the space between the stranded cable and -the tip piece.
After the sealing has been carried out in this way, the cementing agent is ~ed by means o~ the pump 27 through a channel 17 in the tip piece into the drill hole, whereby, as the cementing agent penetrates into the hole, the air present therein i~ discharged through the air discharge hose, without preventing the feeding of the cementing agent.
After a su~ficient quantity o~ cementing agent has been fed, the ~eeding of cementing agent is discon-tinued, the inner guide pipe is pulled backwards by means of the displacement cylinder 10, whereby the sealing rubber becomes ~ree from compression and is expanded out of contact with the stranded cable. As the inner guide pipe moves further backwards, it pulls along the outer guide pipe with tlle tip peice towards the feeding mechanism. Finally, the stranded cable is cut off by means of the cutter 22.
In the pressing means 21 attached to the guide pipe between the sleeve-shaped sealing rubber and the inner guide pipe, there is a conical hole 28 facing towards the guide pipe, which hole guides the stranded cable fed into the pipe through the sleeve-shaped sealing rubber withouth damaging the rubber.
In the embodiment described, the same power source, i.e. a hydraulic displacement cylinder 10, is used in order to shift the outer guide pipe into sealing contact with the drill hole as well as in order to com-press the sealing rubber into sealing contact with the stranded cable. As an alternative, it is possible to attach the outer guide pipe to the support 8 of the sledge 9 and to install a hydraulic disp1acement cylinder 10' ~32~
between ~he outer guide pipe and the inner yuide pipe, as shown in Fig. 4.
In the emboaiment shown in Fig. 5, the inner guide pipe is in engagement with the outer guide pipe by the intermedia-te of a threaded joint 29~ The outer guide pipe is attached to the support 8 of the sledge.
In order to turn the inner guide pipe around its axis relative the outer protective pipe, a rotating device 31 is installed, which is illustrated only sche~atically.
When the inner guide pipe is rotated, it moves axially towards the sealing rubber and compresses it axially.
In the embodiment shown in Fig. 5, the hole passing through the mouth piece 21' of the inner guide pipe is formed by a wedge surface 21a having the shape of a double cone, and the end facing towards the mouth piece of the sealing r~bber 20' is provided with a corresponding conical wedge surface 20a. When the mouth piece is pushed towards the sealing rubber, the mouth piece compresses the sealing rubber both axially and radially.
In the embodiment shown in Fig. 7, the feed pipe comprises only an outer guide pipe 11, to which the support 8 of the sledge is attached. Inside the guide pipe, a hydraulic cylinder-piston construction is installed, whose piston 31 can slide axially upon end pieces 32. The inlet and outlet gates of pressure fluid are denoted with reference numerals 33 and 34. When the piston is pressed towards the sealing rubber, it com-presses the sealing rubber axially so that the sealing rubber is pressed radially against the stranded cable.
Instead of a double acting cylinder, a single acting hydraulic cylinder can be used, in which the piston is returned by the compression force of the sealing rubber.
The drawings and the related description are only supposed to illustrate the idea of the :invention.
In its details, -the eyuipment in accordance with the invention may vary within the scope of the patent clairns.
In stead of a sleeve-shaped seal, it is possible to use a seal of the shape of, e.g., a truncated cone, wherein the point of the cone may be oriented in whichever direction. It is, however, preferably oriented off the rock, whereby the pr~ssure yenerated by the cementing agent presses the seal ever more tightly around the stranded cable, and thereby seals better. Correspond-ingly, it is possible to use a seal of the shape of a double cone, in which case the seal becomes conically narrower in both directions from the middle of the seal.
Round or annular seals shaped in different ways as well as groups of seals possibly consisting of several seals of different or equal shapes are also applicable in accordance with the invention.
radial constriction of the seal of elastic material around the stranded cable is achieved so that, when pressed ayainst the stranded cable, the seal both seals the stranded cable and keeps it reliably in position during the feeding and hardening of the cementing agent. The mode of sealing based on an elasticall~
compressible seal is not sensitive to wear and can adapt itself to variations in diameter possibl~ occur-ing in stranded cables.
The invention is also concerned with equipment for rock b~lting by means of a continuous stranded cable. The equipment is characterized in ~hat is stated in claim 3. The equipment in accordance with the inven-tion is characterized in a constructionally and operationally simple realization of the sealing opera-tion, because the axial movement required by the axial compressing of the seal can be combined with such an axial movement which anyhow must be performed in rock bolting. The combining of the movements can be carried out in several different ways. It is characteristic of all the embodiments that the sealing ring is compressed axially and, owing to its elasticity, at the same time, radially against the stranded cable.
The invention will be described in more detail below with reference to the attached drawings, wherein Figure 1 is a side view of a preferred embodi-ment of a bolting equipment in accordance with the invention, Figures 2 and 3 are enlarged axial sectional views of the front end of the feed pipe of the bolting equipment in two different operational positions, and Figures 4 to 7 are axial sectional views of alternative emboidments of the front end of the feed pipe.
~92~5~L
The rock bolting equipment shown in Fig. 1 of the drawings comprises a transfer beam 2 supported b~
a cradle 1, which beam is displaceable longitudinally relative the cradle on glide shoes 3 by means of a cylinder 4, which acts between the transfer beam and the cradle. The trans~er beam supports a feeding mechanism 5 for the stranded cable, which mechanism may be, e.g., of the prior-art construction described in ~.S. Patent Specification 4,155,409 and which is displaceable longi-tudinally on the transfer beam by means of an adjust-mentcylinder 6, which acts hetween the transfer beam and the feeding mechanism.
A feed pipe 7 projects from the feeding mechanism in parallel with the transfer beam, the front part of the said feed pipe being supported on a sledge 9 by means of a support 8. The sledge 9 is movable longitudi-nallY on the transfer beam by means of a displacement cylinder 10, which acts between the sledge and the feeding mechanism.
The feed pipe is in Figures 1 to 6 telescopic and comprises an outer guide pipe 11 and an inner guide pipe 12, which can move axially realtive each other. To the front end of the outer guide pipe, a tip piece 13 has been attached, which is provided with a rubber tip 14. The tip piece is provided with an axial hole 15 which is intended for the passage of the stranded cable 16 and from which a channel 17 is branched for a cemen-ting agent and a channel 18 for an air hose 19.
In the embodiment shown in Figures 1 to 3, the inner guide pipe 12 of the feed pipe is attached to the support 8 of the sledgP 9. Inside the outer guide pipe, a sleeve-shaped sealing rubber 20 is fitted between the tip piece and an annuIar pressing means 21 attached to the end of the inner guide pipe.
The equipment i.s additionally provide~ with a cut~er 22, which is mounted pivotably on the trans~er beam for cutting the stranded cahle.
The rock bolting is per~ormed as follows:
~ y positioning the transfer beam 1, the feed pipe 7 is aligned so as to be placed in line with the hole 24 drilled into the rock 23. By displacing the feeding mechanism 5 by means of the cylinder 6 and the sle~ge 9 by means of the cylinder 10, the tip piece 13 of the feed pipe is guided axially so that it faces the drill hole, and the tip piece is pushed some distance into the hole (in the present case, into a protective pipe 25 fitted in the holel in order to exclude lateral movement, Fig. 2. Hereinafter, the stranded cable 16 is fed from a reel 26 by means of the feeding mechanism through the guide pipes, the sealing rubber and the tip piece into the drill hole. The end of the air-exhaust hose 19 is attached to the end of the stranded cable, whereby the cable pulls the hose along into the hole.
After the ~eeding of the stranded cable has been carried out, the feeding o~ the cementing agent begins.
First, the feed pipe is pushed forwards by means of the displacement cylinder 10 so that the conical rubber tip 14 is pressed tightly against the end edge of the pro-tective pipe. The pushing is continued further by means o~ the displacement cylinder, whereby, when the rubber tip is compressed, the movement of the outer guide pipe 11 becomes more difficult. Thereby the inner guide pipe 12, upon which the pushing force acts~ is displaced axially forwards relative the outer guide pipe and com-presses the sleeve-shaped sealing rubber 20 placed around the stranded cable axially. As a result of this axial compression, the sealing rubber is pressed radially against the stranded cable and, by the e~fect o adequate compression, seals the space between the stranded cable and -the tip piece.
After the sealing has been carried out in this way, the cementing agent is ~ed by means o~ the pump 27 through a channel 17 in the tip piece into the drill hole, whereby, as the cementing agent penetrates into the hole, the air present therein i~ discharged through the air discharge hose, without preventing the feeding of the cementing agent.
After a su~ficient quantity o~ cementing agent has been fed, the ~eeding of cementing agent is discon-tinued, the inner guide pipe is pulled backwards by means of the displacement cylinder 10, whereby the sealing rubber becomes ~ree from compression and is expanded out of contact with the stranded cable. As the inner guide pipe moves further backwards, it pulls along the outer guide pipe with tlle tip peice towards the feeding mechanism. Finally, the stranded cable is cut off by means of the cutter 22.
In the pressing means 21 attached to the guide pipe between the sleeve-shaped sealing rubber and the inner guide pipe, there is a conical hole 28 facing towards the guide pipe, which hole guides the stranded cable fed into the pipe through the sleeve-shaped sealing rubber withouth damaging the rubber.
In the embodiment described, the same power source, i.e. a hydraulic displacement cylinder 10, is used in order to shift the outer guide pipe into sealing contact with the drill hole as well as in order to com-press the sealing rubber into sealing contact with the stranded cable. As an alternative, it is possible to attach the outer guide pipe to the support 8 of the sledge 9 and to install a hydraulic disp1acement cylinder 10' ~32~
between ~he outer guide pipe and the inner yuide pipe, as shown in Fig. 4.
In the emboaiment shown in Fig. 5, the inner guide pipe is in engagement with the outer guide pipe by the intermedia-te of a threaded joint 29~ The outer guide pipe is attached to the support 8 of the sledge.
In order to turn the inner guide pipe around its axis relative the outer protective pipe, a rotating device 31 is installed, which is illustrated only sche~atically.
When the inner guide pipe is rotated, it moves axially towards the sealing rubber and compresses it axially.
In the embodiment shown in Fig. 5, the hole passing through the mouth piece 21' of the inner guide pipe is formed by a wedge surface 21a having the shape of a double cone, and the end facing towards the mouth piece of the sealing r~bber 20' is provided with a corresponding conical wedge surface 20a. When the mouth piece is pushed towards the sealing rubber, the mouth piece compresses the sealing rubber both axially and radially.
In the embodiment shown in Fig. 7, the feed pipe comprises only an outer guide pipe 11, to which the support 8 of the sledge is attached. Inside the guide pipe, a hydraulic cylinder-piston construction is installed, whose piston 31 can slide axially upon end pieces 32. The inlet and outlet gates of pressure fluid are denoted with reference numerals 33 and 34. When the piston is pressed towards the sealing rubber, it com-presses the sealing rubber axially so that the sealing rubber is pressed radially against the stranded cable.
Instead of a double acting cylinder, a single acting hydraulic cylinder can be used, in which the piston is returned by the compression force of the sealing rubber.
The drawings and the related description are only supposed to illustrate the idea of the :invention.
In its details, -the eyuipment in accordance with the invention may vary within the scope of the patent clairns.
In stead of a sleeve-shaped seal, it is possible to use a seal of the shape of, e.g., a truncated cone, wherein the point of the cone may be oriented in whichever direction. It is, however, preferably oriented off the rock, whereby the pr~ssure yenerated by the cementing agent presses the seal ever more tightly around the stranded cable, and thereby seals better. Correspond-ingly, it is possible to use a seal of the shape of a double cone, in which case the seal becomes conically narrower in both directions from the middle of the seal.
Round or annular seals shaped in different ways as well as groups of seals possibly consisting of several seals of different or equal shapes are also applicable in accordance with the invention.
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Method of rock bolting by means of a conti-nuous stranded cable, according to which method, - a feed pipe (7) is shifted to a position facing a hole (24) drilled into a rock, - a stranded cable (16) is fed through the feed pipe into the drill hole, - the feed pipe is pressed against the drill hole for sealing the feed pipe in relation to the rock, - the stranded cable is sealed by means of a seal (20) in relation to the feed pipe, - a cementing agent is fed through the feed pipe into the drill hole, and - the feed pipe is displaced from the drill hole and the stranded calbe is cut off, c h a r a c t e r i z e d in that the seal (20) is compressed axially so as to constrict the seal radially around the stranded cable (16) into contact with the circumferential surface of the stranded cable.
2. Method as claimed in claim 1, c h a r a c -t e r i z e d in that the feed pipe (7) pressed against the drill hole (24) is pressed further in the direction of the drill hole for the purpose of axial compression of the seal (20).
3. Equipment for rock bolting by means of a stranded cable, which equipment comprises - a transfer beam (1), - a feed pipe (7) supported by the transfer beam, the end of the feed pipe being provided with a tip piece (13), - a displacement device (10) for displacing the feed pipe axially along the transfer beam, - means (5,27) for feeding the stranded cable and a cementing agent through the tip piece, and - an annular seal (20) supported by the feed pipe, the stranded cable (16) extending through said annular seal, c h a r a c t e r i z e d in that - the seal (20) is an elasticially compressible sealing ring forming a passage hole, which is constric-ted radially as the sealing ring is compressed axially, and - that the equipment is provided with an opera-ting mechanism (10;10';30;31) for axial compressing of the sealing ring.
4. Equipment as claimed in claim 3, c h a r a c-t e r i z e d in that the feed pipe (7) comprises two guide pipes (11,12) mounted axially slidably one inside the other, that the sealing ring (20) is mounted axially between the guide pipes so that one end of the sealing ring is axially stationary relative one of the guide pipes (11) and that the other end is axially displace-able by means of the other guide pipe (12).
5. Equipment as claimed in claim 4, c h a r a c-t e r i z e d in that the inner guide pipe (12) of the feed pipe (7) is attached to a support (8) by means of which the feed pipe is supported axially movably on the transfer beam (1), and that the operating mechanism (10) consists of said displacement device for the feed pipe, which device acts between said support and the transfer beam.
6. Equipment as claimed in claim 4, c h a r a c -t e r i z e d in that the operating mechanism (10') consists of a pressure-medium cylinder acting between the outer guide pipe (11) and the inner guide pipe (12).
7. Equipment as claimed in claim 4, c h a r a c -t e r i z e d in that the outer guide pipe (11) and the inner guide pipe (12) are in threaded engagement (29) with each other and that the operating mechanism (30) consists of a turning device rotating the guide pipes in relation to each other.
8. Equipment as claimed in claim 4, c h a r a c-t e r i z e d in that the sealing ring (20') is provid-ed with a conical wedge face (20a) by means of which the sealing ring is pressed against a surrounding wedge face (21a) provided in the inner guide pipe (12).
9. Equipment as claimed in claim 3, c h a r a c-t e r i z e d in that the sealing ring (20) is installed in the feed pipe (7) so that one end of the sealing ring is stationary in relation to the feed pipe, that an axially movable press sleeve (31') abutting against the other end of the sealing ring is installed inside the feed pipe, and that the operating mechanism consists of a pressure-medium cylinder (31 to 34) acting between the feed pipe and the press sleeve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI823483A FI823483A0 (en) | 1982-10-13 | 1982-10-13 | ANOFLOWER FOR OVERFLOWER FOER DESS UTNYTTJANDE VID VAJERN OROERLIGHET |
| FI823483 | 1982-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1192754A true CA1192754A (en) | 1985-09-03 |
Family
ID=8516146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000438638A Expired CA1192754A (en) | 1982-10-13 | 1983-10-07 | Method for rock bolting by using a stranded cable and equipment for carrying out rock bolting |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU561119B2 (en) |
| CA (1) | CA1192754A (en) |
| FI (1) | FI823483A0 (en) |
| SE (1) | SE458133B (en) |
| ZA (1) | ZA837589B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012000016A1 (en) * | 2010-06-30 | 2012-01-05 | Dywidag-Systems International Pty Limited | An apparatus for post-grouting a cable bolt, cable bolt assembly and method of installing a cable bolt |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI105411B (en) * | 1997-04-18 | 2000-08-15 | Tamrock Oy | Feeder for feeding the wire in rock bolting equipment |
-
1982
- 1982-10-13 FI FI823483A patent/FI823483A0/en not_active Application Discontinuation
-
1983
- 1983-10-07 CA CA000438638A patent/CA1192754A/en not_active Expired
- 1983-10-10 SE SE8305552A patent/SE458133B/en not_active IP Right Cessation
- 1983-10-11 AU AU20062/83A patent/AU561119B2/en not_active Ceased
- 1983-10-12 ZA ZA837589A patent/ZA837589B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012000016A1 (en) * | 2010-06-30 | 2012-01-05 | Dywidag-Systems International Pty Limited | An apparatus for post-grouting a cable bolt, cable bolt assembly and method of installing a cable bolt |
| AU2011274289B2 (en) * | 2010-06-30 | 2013-02-28 | DSI Underground Australia Pty Limited | An apparatus for post-grouting a cable bolt, cable bolt assembly and method of installing a cable bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8305552L (en) | 1984-04-14 |
| ZA837589B (en) | 1984-11-28 |
| SE458133B (en) | 1989-02-27 |
| AU2006283A (en) | 1984-04-19 |
| AU561119B2 (en) | 1987-04-30 |
| SE8305552D0 (en) | 1983-10-10 |
| FI823483A0 (en) | 1982-10-13 |
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