CA1251475A - Raise bore mining method and apparatus for carrying out the method - Google Patents
Raise bore mining method and apparatus for carrying out the methodInfo
- Publication number
- CA1251475A CA1251475A CA000494464A CA494464A CA1251475A CA 1251475 A CA1251475 A CA 1251475A CA 000494464 A CA000494464 A CA 000494464A CA 494464 A CA494464 A CA 494464A CA 1251475 A CA1251475 A CA 1251475A
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- CA
- Canada
- Prior art keywords
- raise
- mining
- assembly
- drill
- bored
- 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
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Abstract
Abstract of the Disclosure A raise bore mining method and apparatus is disclosed.
A raise is bored from one drift level to the next with a conventional raise boring machine using a string of drill pipes. On completion of the raise boring a mining assembly is attached to the end of the drill string of the same or a different raise boring machine for moving the mining assembly up and down the bored raise, whereby the regular mining activities such as drilling, blasting, ground support, etc, may be performed from such mining assembly.
A raise is bored from one drift level to the next with a conventional raise boring machine using a string of drill pipes. On completion of the raise boring a mining assembly is attached to the end of the drill string of the same or a different raise boring machine for moving the mining assembly up and down the bored raise, whereby the regular mining activities such as drilling, blasting, ground support, etc, may be performed from such mining assembly.
Description
-- ~25~:1 475 RAISE BORE MINING METHOD AND APPARATUS FOR
CARRYING oU~ THE ~ETHOD
This invention relates to a raise bore mining method and an apparatus for carrying out the method.
Raise boring has been successful in virtually all t~pes of rock. Modern raise boring machines are able to drive 10-12 ~t. diameter raises at a rate of up to 1000 ft. per month. The known raise boring machines are capable of drilling a pilot hole o~ up to 300 meters and then reaming the pilot hole out to 10-12 ft. On completion of the. raise reaming, a rail such as the one developed by Linden-Alimak AB i8 installed on th~ hanging wall of the rais~
and a drill rig such as the one developed by Tamrock, Finland for the Swedish Viscaria Mine, i8 mounted on the rail. Using the Tamrock-Viscaria rig, horizontal or inclined fan pattern of blastholes are drilled from the rig. The drill rig has an automatic rod changer which allows up to 100 feet of 4 inch diameter blastholes to be drilled. The drill is normally controlled by a microprocessor. Drill patterns are fed to the microprocessor via a line from a central office. Thus the operator does not have to control the azimuth or depth of the blastholes.
The Tamrock-Viscaria rig drills off an ore block at higher rate than any prior art conventional devices.
Varying ore shapes can be accommodated by varying the length and azimuth of the blastholes. Loading of blastholes is mechanized and highly productiva. However, the Tamrock-Vi~caria rig has several disadvantages:
1. The Linden-Alimak rail attached on the hanging wall of the raise can only handle a veight o~ 10 tons or so and, there~ore, the drill rig has to he quite light.
CARRYING oU~ THE ~ETHOD
This invention relates to a raise bore mining method and an apparatus for carrying out the method.
Raise boring has been successful in virtually all t~pes of rock. Modern raise boring machines are able to drive 10-12 ~t. diameter raises at a rate of up to 1000 ft. per month. The known raise boring machines are capable of drilling a pilot hole o~ up to 300 meters and then reaming the pilot hole out to 10-12 ft. On completion of the. raise reaming, a rail such as the one developed by Linden-Alimak AB i8 installed on th~ hanging wall of the rais~
and a drill rig such as the one developed by Tamrock, Finland for the Swedish Viscaria Mine, i8 mounted on the rail. Using the Tamrock-Viscaria rig, horizontal or inclined fan pattern of blastholes are drilled from the rig. The drill rig has an automatic rod changer which allows up to 100 feet of 4 inch diameter blastholes to be drilled. The drill is normally controlled by a microprocessor. Drill patterns are fed to the microprocessor via a line from a central office. Thus the operator does not have to control the azimuth or depth of the blastholes.
The Tamrock-Viscaria rig drills off an ore block at higher rate than any prior art conventional devices.
Varying ore shapes can be accommodated by varying the length and azimuth of the blastholes. Loading of blastholes is mechanized and highly productiva. However, the Tamrock-Vi~caria rig has several disadvantages:
1. The Linden-Alimak rail attached on the hanging wall of the raise can only handle a veight o~ 10 tons or so and, there~ore, the drill rig has to he quite light.
2. To save on weiyht, the drill riy is su~pended below the rig and is thus difficult tG service.
3. A cable winch is required to move the Tamrock-Viscaria rig. Thus, there is the potential for a broken cable, winch pxoblem, sheave failures, etc.
4. Drill vibrations can cause failure of the rail or the anchoring bolts and thus there i~ an additional potential for failure.
5. The shape o~ the raise is not optimum ~or collaring drill holes.
It is therefore the object of the present invention to provide a new method and apparatus for the mechanization of bulk mining. The method, called raise bore mining, is suitable to mine large tabular and steeply dipping ore bodies, both primary mining and pillar recovery, rapidly and economically.
The method, in accordance with the present invention, comprises the steps of boring a raise from one drift level to the next with a conventional raise boring machine using ~5~4~S
a string of drill pipes, on completion of the raise boring, attaching a mining as6embly to the end of the drill string of the sa~e or a different raise boring machine ~or moving the mining assembly up and down the bored raise, and performing regular mining activities such as drilling, blasting, ground support, etc, from such mining assembly.
The distance between adjacent bored raises depends on the size and geometry of the ore body and the extent of the blasthole drill pattern. Permissible dip depends on the angle of repose of the muck.
By using the drill string of a raise boring machine to suspend the mining assembly, large capacity drills may be used to drill the blastholes. Aftar reaming ~he raisa, a less expen~ive raise boring machine may be substituted for the purpo~e o~ raising or lowering the mining assembly.
The raise bore apparatus comprises a raise boring machine adapted to drill a raise using a string of drill pipes, a mining assembly attached to the end of the drill string of the raise boring machine for moving the mining assembly up and down the bored raise, and means for performing regular mining activities such as drilling, blasting, ground support, from said mining assembly.
Fail sa~e security may be provided to the mining assembly by means of spring loaded and hydraulically ! released gripper pads which fix the mining a~sembly to the ~Z5~75 wall of the bored raise while performing mining activities or to support the assembly while removing or adding sections of drill string pipes to the boring machine.
The mining assembly is g~nerally made in two superposed sections interconnected by hydraulic or air cylinders to permit a blasthole drill mounted on the lower section to be displaced along the raise without moving the mining assembly as a whole. The inherent advantage of such a system is to permit the adjustment of the blasthole drill elevation and the drilling of more than one row of blast-holes, and to allow greater accuracy in collaring holes.
Each ~ection i5 provided with spring loaded and hydraulically released gripper pads. By alternately gripping and releasing the gripper pads of one section versus tho~e of the other ~ection, and using the cylinders, the mining assembly can also be moved along the bored raise if required.
Access of personnel and supply to and from the mining assembly may be by conventional Linden-Alimak raise climbers traveling upon a rail attached to the bored raise wall. An alternative method is by using a mobile service rig capable of traveling along the drill string of the raise boring machine as disclosed and claimed in Canadian application No. ~ 9~ 5 filed ~o JQ~Y I~ Iq~
Additional stability of the stope walls may be achieved by cable bolting during the production phase by extending 1'~5~475 the regular blastholes for the installation o~ cable bolts.
The in~ention will now be disclosed, by way of example, - with referance to the accompanying drawings in which:
Figure 1 is a cross section view of a raise bore stope, Figure 2 is view ~f a first embodiment of a mining assembly; and Figure 3 is a view of a second embodiment of a mining a~sembly~
Referring to Figure 1, there is shown a raise bore stope 10 through which has been bored a raise 12. It is to be understood however that a raise may be driven long enough to ~ervice several stopes along its length. The angle of dip of the raise depends on the angle of repose of the muck. The raise is bor~d by a xaise boring machine 14 suitably located in an access drift at a predetermined height above the top of the stope so as to leave a crown pillar above the stope. The raise boring machine is provided with conventional equipment capable of delivering a string of drill pipes 16 for drilling a pilot hole down the stope. The pilot hol~ is subsequently reamed by additional equipment attached to the drill string to enlarge the pilot hole between an upper access drift 18 and a lower access drift which is later undercut as indicated at 20. A haulage drift 22 provides access to the stope undercut. A mining assembly 24 is attached to the l4~5 end of the drill string 16. A service rig 26 is mounted on a rail (not ~hown) attached to the hanging wall of the raise to provide access of personnel and supply to the mining assembly.
Referring to Yigure 2 there is shown a mining assembly comprising a drill deck 30 and an operator's deck 32 supported by two rings 34 and 36 respectively. A platform 38 is attached to the top ring by three support columns 40 Qpaced at 120C. The top ring is attached to the drill string 16 by means of a swivel attachment 42 which prevents any rotation in the drill string to be transmitted to the mining assembly. A platform 44 is attached to the lower ring by thre~ hollow tubes 46 also spaced at 120C.
The drill deck 30 is suspended under the operator's deck by hydraulic or air cylinders 48 mounted on lower ring 34 and having their pistons 50 connected to the platform 38. This permits the drill deck to move along the raise independently of the operator's deck and thus adjustment o~ the elevation o~ the drilling eguipment and drilling of more than one row of blastholes without having to move the mining assembly as a whole.
Spring loaded and hydraulically released gripper pads 52 are mounted on the upper and lower rings. The gripper pads fix the mining assembly to the wall of the bored raise while performing mining activities and are used to ~5~75 support the assembly while removing, or adding sections of drill string pipes to the boring machine. Furthermore, by alternately gripping and releasing the gripper pads o~ the lower riny with respect to thosa of the top ring and operating the cylinders 48, the mining ass~mbly can be moved along the bored raise if required. Thare is at all times at least one set of grippers act:ivated to ensure the 6afety to the mining assembly. Support columns 40 extend to the bottom of the drill deck through tubes 46 and serve as guides to the lower ring.
The platform 38 of the operator's deck 32 may be provided with rollers 53 to guide its pa~sage along the bored rai3e wall in inclined raises. An operator's cabin 54 is mounted on three cylinders 56 which serve to level the cabin ln inclined bored raises. A power unit 58 i8 also mounted on aylinders 60 for the same purpose.
Ladders 62 connect the two decks of the mining assembly.
A conventional drill rig 64 i~ suspended from the lower ring via an articulated arm 66. The arm may be rotated in a horizontal plane by means of a shaft 68 and locked in position with a disk brake 70. The drill rig may be pivoted in the vertical plane by means of an articulated arm 72 and cylinder 74. A cylinder 76 operating a pad 78 applies a compensating force on the bored raise wall while drilling.
:~2S~
As shown in Figure 1 of the drawings, the blast hole drill may be used to drill holes eor installing cable bolts 79.
Referring to Figure 3, there is shown a second embodiment of a mining assembly comprisiny an upper ring 80 and a lower ring 82 connected by cylinders 84 permitting the lower ring 82 to move independently of the top ring 80 ~or the same purpose as in the ~irst embodiment of the mining assembly. Three support columns 86 spaced at 120DC are fixed to the lower ring and pass through the upper ring to serve as guides for the movement o~ the upper ring. Each ring is mounted with ~ail safe sprlnq loaded and hydraulically released grippar pad~ 88 which serve to fix the mining assembly to the bored raise wall. Rollers 90 mounted on each ring permit the movement of the rings without damaging the pads. As in the first embodiment, by alternately gripping and releasing the gripper pads on the lower ring with respect to those of the top ring and operating the cylinders, the mining assembly can be moved along th~ bored raise if required.
The drill string 16 of the raise boring machine is attached to the upper ring B0 of the mining assembly through a swivel attachment 92 which prevents any rotation of the drill string to be transmitted to the mining assembly.
A power unit 94 is mounted on the lower ring~
A drill ring 96 and an ~perator's cabin 98 are supported underneakh the lower ring. Both drill and operator's cabin are able to rotate in a horizontal plane via a turntable loo. A ball and socket attachment 102 and a pair of levelling cylinders 104 serve~ to level the turntable. A work platform 106 is also ~uspended under the lower ring via columns 108. The work platform can be leveled by ball and socket attachment 110 and cylinders 112.
The blasthole drill mounting assembly is designed to permit a horizontal offset 60 that obstacles such as columns 108 can be avoided. The blasthole drtll is of conventional type.
Drilling is preferably carried out ~rom higher to lower elevations and controlled by a microprocesBor 80 that the operator doe~ not ha~e to set the azimuth or depth of the blastholes. Drill pattern~ may be fed to the microprocessor via a line from a central office.
At the start of the drilling cycle, the gripper pads on the upper and lower sections o~ tha mining assembly are extended against the rock. Once a complete row of blast-hole is drilled off, the gripper pads on the lower section of the mining assembly are retracted and the cylinders are extended to the preset location of the next row of blasthole~ and so on until full extension of the cylinders is reached. Once the full extension of the ~53L4t~5 cylinders has been reached, the gripper pads on the lower section are applied and those on the upper section retracted so as to allow the raise boring machine to add additional raise bore drill pipes for lowering the mining assembly. The above drilling operation can be completely mechanized and automatedO
once the complete stope is drilled off, the mining assembly may be removed and replaced by a blasting platform but the mining assembly is preferably used for loading the blastholes and blasting. Loading and blasting is pre~srably carried out from the bottom to the top of the raise. Loading and blasting can also be mechanized by u~ing bulk explosive which would be blown through a hose from one level above and detonated using conventional detonators, thus minimizing material handling.
The main feature of the present invention is that it permits mining of an ore body from a bored raise using a mining assembly which is suspended from the drill string of a raise boring machine. ~he mining assembly may be moved up and down the bored raise using the raise boring machine. This feature allows no practical weight limitation for the mining assembly. This is a marked improvement over the Tamrock-Viscaria rig which is limited by the load handling capacity Q~ the Alimak rail used to support the drill rig in the bored raise.
Another advantage of the pre~ent invention is the use ~25~
of a mining asembly having two indendepent sections interconnected by cylinders which allow drilling o~
several rows of blastholes without moviny the mining assembly as a whole.
Additional advantages of the present invention are as follow :
1~ Mining assembly is completely mechanized and can be automated with present technology.
2. Mining method is suitable for remote control mining such as in radio active or high stres areas.
3~ Fewer accesses are re~uired thus reducing development C08t. This becomes significant in high stress or high temperature areas where conditioning of accesses is a major expense.
4. Driving of a bored raise is fast and safe. A bored raise is also easier to condition than conventional drill and blast raises.
5. Collaring of drill holes will be easier eince a drill located in the center o~ a circular bored raise will always be at right angle to the raise wall. Ease at collaring increase blast hole accuracy.
It is therefore the object of the present invention to provide a new method and apparatus for the mechanization of bulk mining. The method, called raise bore mining, is suitable to mine large tabular and steeply dipping ore bodies, both primary mining and pillar recovery, rapidly and economically.
The method, in accordance with the present invention, comprises the steps of boring a raise from one drift level to the next with a conventional raise boring machine using ~5~4~S
a string of drill pipes, on completion of the raise boring, attaching a mining as6embly to the end of the drill string of the sa~e or a different raise boring machine ~or moving the mining assembly up and down the bored raise, and performing regular mining activities such as drilling, blasting, ground support, etc, from such mining assembly.
The distance between adjacent bored raises depends on the size and geometry of the ore body and the extent of the blasthole drill pattern. Permissible dip depends on the angle of repose of the muck.
By using the drill string of a raise boring machine to suspend the mining assembly, large capacity drills may be used to drill the blastholes. Aftar reaming ~he raisa, a less expen~ive raise boring machine may be substituted for the purpo~e o~ raising or lowering the mining assembly.
The raise bore apparatus comprises a raise boring machine adapted to drill a raise using a string of drill pipes, a mining assembly attached to the end of the drill string of the raise boring machine for moving the mining assembly up and down the bored raise, and means for performing regular mining activities such as drilling, blasting, ground support, from said mining assembly.
Fail sa~e security may be provided to the mining assembly by means of spring loaded and hydraulically ! released gripper pads which fix the mining a~sembly to the ~Z5~75 wall of the bored raise while performing mining activities or to support the assembly while removing or adding sections of drill string pipes to the boring machine.
The mining assembly is g~nerally made in two superposed sections interconnected by hydraulic or air cylinders to permit a blasthole drill mounted on the lower section to be displaced along the raise without moving the mining assembly as a whole. The inherent advantage of such a system is to permit the adjustment of the blasthole drill elevation and the drilling of more than one row of blast-holes, and to allow greater accuracy in collaring holes.
Each ~ection i5 provided with spring loaded and hydraulically released gripper pads. By alternately gripping and releasing the gripper pads of one section versus tho~e of the other ~ection, and using the cylinders, the mining assembly can also be moved along the bored raise if required.
Access of personnel and supply to and from the mining assembly may be by conventional Linden-Alimak raise climbers traveling upon a rail attached to the bored raise wall. An alternative method is by using a mobile service rig capable of traveling along the drill string of the raise boring machine as disclosed and claimed in Canadian application No. ~ 9~ 5 filed ~o JQ~Y I~ Iq~
Additional stability of the stope walls may be achieved by cable bolting during the production phase by extending 1'~5~475 the regular blastholes for the installation o~ cable bolts.
The in~ention will now be disclosed, by way of example, - with referance to the accompanying drawings in which:
Figure 1 is a cross section view of a raise bore stope, Figure 2 is view ~f a first embodiment of a mining assembly; and Figure 3 is a view of a second embodiment of a mining a~sembly~
Referring to Figure 1, there is shown a raise bore stope 10 through which has been bored a raise 12. It is to be understood however that a raise may be driven long enough to ~ervice several stopes along its length. The angle of dip of the raise depends on the angle of repose of the muck. The raise is bor~d by a xaise boring machine 14 suitably located in an access drift at a predetermined height above the top of the stope so as to leave a crown pillar above the stope. The raise boring machine is provided with conventional equipment capable of delivering a string of drill pipes 16 for drilling a pilot hole down the stope. The pilot hol~ is subsequently reamed by additional equipment attached to the drill string to enlarge the pilot hole between an upper access drift 18 and a lower access drift which is later undercut as indicated at 20. A haulage drift 22 provides access to the stope undercut. A mining assembly 24 is attached to the l4~5 end of the drill string 16. A service rig 26 is mounted on a rail (not ~hown) attached to the hanging wall of the raise to provide access of personnel and supply to the mining assembly.
Referring to Yigure 2 there is shown a mining assembly comprising a drill deck 30 and an operator's deck 32 supported by two rings 34 and 36 respectively. A platform 38 is attached to the top ring by three support columns 40 Qpaced at 120C. The top ring is attached to the drill string 16 by means of a swivel attachment 42 which prevents any rotation in the drill string to be transmitted to the mining assembly. A platform 44 is attached to the lower ring by thre~ hollow tubes 46 also spaced at 120C.
The drill deck 30 is suspended under the operator's deck by hydraulic or air cylinders 48 mounted on lower ring 34 and having their pistons 50 connected to the platform 38. This permits the drill deck to move along the raise independently of the operator's deck and thus adjustment o~ the elevation o~ the drilling eguipment and drilling of more than one row of blastholes without having to move the mining assembly as a whole.
Spring loaded and hydraulically released gripper pads 52 are mounted on the upper and lower rings. The gripper pads fix the mining assembly to the wall of the bored raise while performing mining activities and are used to ~5~75 support the assembly while removing, or adding sections of drill string pipes to the boring machine. Furthermore, by alternately gripping and releasing the gripper pads o~ the lower riny with respect to thosa of the top ring and operating the cylinders 48, the mining ass~mbly can be moved along the bored raise if required. Thare is at all times at least one set of grippers act:ivated to ensure the 6afety to the mining assembly. Support columns 40 extend to the bottom of the drill deck through tubes 46 and serve as guides to the lower ring.
The platform 38 of the operator's deck 32 may be provided with rollers 53 to guide its pa~sage along the bored rai3e wall in inclined raises. An operator's cabin 54 is mounted on three cylinders 56 which serve to level the cabin ln inclined bored raises. A power unit 58 i8 also mounted on aylinders 60 for the same purpose.
Ladders 62 connect the two decks of the mining assembly.
A conventional drill rig 64 i~ suspended from the lower ring via an articulated arm 66. The arm may be rotated in a horizontal plane by means of a shaft 68 and locked in position with a disk brake 70. The drill rig may be pivoted in the vertical plane by means of an articulated arm 72 and cylinder 74. A cylinder 76 operating a pad 78 applies a compensating force on the bored raise wall while drilling.
:~2S~
As shown in Figure 1 of the drawings, the blast hole drill may be used to drill holes eor installing cable bolts 79.
Referring to Figure 3, there is shown a second embodiment of a mining assembly comprisiny an upper ring 80 and a lower ring 82 connected by cylinders 84 permitting the lower ring 82 to move independently of the top ring 80 ~or the same purpose as in the ~irst embodiment of the mining assembly. Three support columns 86 spaced at 120DC are fixed to the lower ring and pass through the upper ring to serve as guides for the movement o~ the upper ring. Each ring is mounted with ~ail safe sprlnq loaded and hydraulically released grippar pad~ 88 which serve to fix the mining assembly to the bored raise wall. Rollers 90 mounted on each ring permit the movement of the rings without damaging the pads. As in the first embodiment, by alternately gripping and releasing the gripper pads on the lower ring with respect to those of the top ring and operating the cylinders, the mining assembly can be moved along th~ bored raise if required.
The drill string 16 of the raise boring machine is attached to the upper ring B0 of the mining assembly through a swivel attachment 92 which prevents any rotation of the drill string to be transmitted to the mining assembly.
A power unit 94 is mounted on the lower ring~
A drill ring 96 and an ~perator's cabin 98 are supported underneakh the lower ring. Both drill and operator's cabin are able to rotate in a horizontal plane via a turntable loo. A ball and socket attachment 102 and a pair of levelling cylinders 104 serve~ to level the turntable. A work platform 106 is also ~uspended under the lower ring via columns 108. The work platform can be leveled by ball and socket attachment 110 and cylinders 112.
The blasthole drill mounting assembly is designed to permit a horizontal offset 60 that obstacles such as columns 108 can be avoided. The blasthole drtll is of conventional type.
Drilling is preferably carried out ~rom higher to lower elevations and controlled by a microprocesBor 80 that the operator doe~ not ha~e to set the azimuth or depth of the blastholes. Drill pattern~ may be fed to the microprocessor via a line from a central office.
At the start of the drilling cycle, the gripper pads on the upper and lower sections o~ tha mining assembly are extended against the rock. Once a complete row of blast-hole is drilled off, the gripper pads on the lower section of the mining assembly are retracted and the cylinders are extended to the preset location of the next row of blasthole~ and so on until full extension of the cylinders is reached. Once the full extension of the ~53L4t~5 cylinders has been reached, the gripper pads on the lower section are applied and those on the upper section retracted so as to allow the raise boring machine to add additional raise bore drill pipes for lowering the mining assembly. The above drilling operation can be completely mechanized and automatedO
once the complete stope is drilled off, the mining assembly may be removed and replaced by a blasting platform but the mining assembly is preferably used for loading the blastholes and blasting. Loading and blasting is pre~srably carried out from the bottom to the top of the raise. Loading and blasting can also be mechanized by u~ing bulk explosive which would be blown through a hose from one level above and detonated using conventional detonators, thus minimizing material handling.
The main feature of the present invention is that it permits mining of an ore body from a bored raise using a mining assembly which is suspended from the drill string of a raise boring machine. ~he mining assembly may be moved up and down the bored raise using the raise boring machine. This feature allows no practical weight limitation for the mining assembly. This is a marked improvement over the Tamrock-Viscaria rig which is limited by the load handling capacity Q~ the Alimak rail used to support the drill rig in the bored raise.
Another advantage of the pre~ent invention is the use ~25~
of a mining asembly having two indendepent sections interconnected by cylinders which allow drilling o~
several rows of blastholes without moviny the mining assembly as a whole.
Additional advantages of the present invention are as follow :
1~ Mining assembly is completely mechanized and can be automated with present technology.
2. Mining method is suitable for remote control mining such as in radio active or high stres areas.
3~ Fewer accesses are re~uired thus reducing development C08t. This becomes significant in high stress or high temperature areas where conditioning of accesses is a major expense.
4. Driving of a bored raise is fast and safe. A bored raise is also easier to condition than conventional drill and blast raises.
5. Collaring of drill holes will be easier eince a drill located in the center o~ a circular bored raise will always be at right angle to the raise wall. Ease at collaring increase blast hole accuracy.
6. The platform under the drill rig on the mining assembly provide~ access to drill for sampling and maintenance.
7. Different options exist for driving the raise such as reaming from top to bottom~ or bottom to top, driving a - ~S14~75 box hole raise, or using a tunnel boring rig, all of which giveæ more flexibility to the methodO
8. During the moving cycle, the mi.ning assembly is always supported by two methods: either two sets of grippers pads both of which are designed to support the total weight of the mining assembly plus the raise boring machine drill stringl or the boring machine drill string plus one set of gripper pads while a portion of the drill a6semb1y i5 being moved.
Claims (5)
1. A raise bore mining method comprising the steps of:
a) boring a raise with a conventional raise boring machine utilizing a string of drill pipes, b) on completion of the raise boring, attaching a mining assembly to the end of the drill string of the raise boring machine for moving the mining assembly up and down the bored raise: and c) performing regular mining activities such as drilling, blasting, ground support, from said mining assembly.
a) boring a raise with a conventional raise boring machine utilizing a string of drill pipes, b) on completion of the raise boring, attaching a mining assembly to the end of the drill string of the raise boring machine for moving the mining assembly up and down the bored raise: and c) performing regular mining activities such as drilling, blasting, ground support, from said mining assembly.
2. A raise bore mining apparatus comprising:
a) a raise boring machine which is normally used to drill a raise utilizing a string of drill pipes;
b) a mining assembly attached to the end of the drill string of the raise boring machine for movement thereof up and down the bored raise, and c) means for performing regular mining activities such as drilling, blasting, ground support, from said mining assembly.
a) a raise boring machine which is normally used to drill a raise utilizing a string of drill pipes;
b) a mining assembly attached to the end of the drill string of the raise boring machine for movement thereof up and down the bored raise, and c) means for performing regular mining activities such as drilling, blasting, ground support, from said mining assembly.
3. A raise bore mining apparatus as defined in claim 2, wherein said mining assembly comprises fail safe spring loaded and hydraulically releases gripper pads which fix the mining assembly to the wall of the bored raise while performing mining activities or to support the mining assembly while removing or adding sections of drill string pipes on the boring machine.
4. A raise bore mining apparatus as defined in claim 3, wherein the mining assembly is made in two superposed sections interconnected by hydraulic or air cylinders which permit a blasthole drill mounted on the lower section to be displaced along the raise without moving the mining assembly as a whole.
5. A raise bore mining apparatus as defined in claim 4, wherein each section is provided with spring loaded and hydraulically released gripper pads, whereby by alternately gripping and releasing the gripper pads of one section versus those of the other section, and operating the cylinders, the mining assembly can be moved along the bored raise if required.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000494464A CA1251475A (en) | 1985-11-01 | 1985-11-01 | Raise bore mining method and apparatus for carrying out the method |
| AU64642/86A AU591191B2 (en) | 1985-11-01 | 1986-10-30 | Raise bore mining method and apparatus for carrying out the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000494464A CA1251475A (en) | 1985-11-01 | 1985-11-01 | Raise bore mining method and apparatus for carrying out the method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1251475A true CA1251475A (en) | 1989-03-21 |
Family
ID=4131786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000494464A Expired CA1251475A (en) | 1985-11-01 | 1985-11-01 | Raise bore mining method and apparatus for carrying out the method |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU591191B2 (en) |
| CA (1) | CA1251475A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004067899A1 (en) | 2003-01-27 | 2004-08-12 | J.S. Redpath Ltd. | Method and apparatus for raise bore drilling and lining a bore hole |
| WO2015025299A1 (en) * | 2013-08-23 | 2015-02-26 | Master Drilling South Africa (Pty) Ltd. | Integrated inspection and maintenance raise boring method and an associated drill string arrangement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE346828B (en) * | 1971-09-07 | 1972-07-17 | Linden Alimak Ab | |
| SE406954B (en) * | 1976-02-12 | 1979-03-05 | Linden Alimak Ab | DEVICE FOR EXPANDING AND SHAPING SMALLER, VERTICAL OR STRONG SLANT |
-
1985
- 1985-11-01 CA CA000494464A patent/CA1251475A/en not_active Expired
-
1986
- 1986-10-30 AU AU64642/86A patent/AU591191B2/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004067899A1 (en) | 2003-01-27 | 2004-08-12 | J.S. Redpath Ltd. | Method and apparatus for raise bore drilling and lining a bore hole |
| US7219750B2 (en) | 2003-01-27 | 2007-05-22 | J.S. Redpath Ltd. | Process and system for drilling and lining a bore hole |
| US7490680B2 (en) | 2003-01-27 | 2009-02-17 | J. S. Redpath Ltd. | Process and system for drilling and lining a bore hole |
| WO2015025299A1 (en) * | 2013-08-23 | 2015-02-26 | Master Drilling South Africa (Pty) Ltd. | Integrated inspection and maintenance raise boring method and an associated drill string arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6464286A (en) | 1987-05-07 |
| AU591191B2 (en) | 1989-11-30 |
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