Side shift raise climbing system
A side-shift raise climbing system is provided that utilizes a side-cut excavated into the wall of the access drift for a raise in a mine. A transfer section is incorporated into the existing length of rail servicing the raise. The transfer section includes a laterally transferable rail that can be detached from the existing rail and shifted along a set of monorails that extend into the side-cut. The transfer section enables a raise climber, when parked thereon, to be shifted out of the access drift without requiring additional access drifts or parking/nesting areas to accommodate the use of muck removal equipment.
1. A transfer assembly for laterally transferring a raise climber out of an access drift, said access drift extending away from a lower end of a raise, said transfer assembly comprising:
a length of rail being sized to fit in series with, and in between, a pair of existing rails supported in said access drift and spaced from each other, to provide continuity between the existing rails and said length of rail and thereby permit said raise climber to drive from said length of rail onto either of said existing rails;
one or more supports attached to and extending upwardly from said length of rail and positioned along said length of rail to be aligned with corresponding transfer rails extending away from said access drift and into a recess in said access drift; and
a trolley at an upper end of each support, each support being sized to provide vertical alignment of a respective trolley with a corresponding transfer rail when said transfer assembly is aligned with said existing rails, each trolley being configured to suspend from, and be moveable along, said corresponding transfer rail, to permit movement of said transfer assembly laterally with respect to said existing rail and into said recess.
2. The assembly according to claim 1 further comprising one or more of said transfer rails configured to be suspended from a back in said recess.
3. The assembly according to claim 2 comprising at least two transfer rails and further comprising at least one crossbeam attached to said at least two transfer rails.
4. The assembly according to claim 2 wherein said one or more transfer rails are suspended from said back using rock bolts.
5. The assembly according to claim 4 comprising a series of rock bolt assemblies for each transfer rail, each rock bolt assembly comprising a plurality of rock bolts sized to extend from said transfer rails to said back.
6. The assembly according to claim 2 comprising three transfer rails, three corresponding trolleys and three corresponding supports in alignment with each other.
7. The assembly according to claim 1 further comprising at least one alignment bolt for securing said length of rail to said existing rails.
8. The assembly according to claim 1 further comprising a service manifold configured to fit between said length of rail and said existing rails to redirect mine services.
9. The assembly according to claim 1 wherein one of said one or more trolleys is powered by a drive system.
10. The assembly according to claim 9 wherein said drive system is air powered and comprises a control box for controlling movement of said powered trolley along a corresponding transfer rail.
11. The assembly according to claim 10 wherein air supply lines for said drive system are tethered to a cable for guiding said air supply lines during movement of said transfer assembly.
12. A method for modifying an access drift in a mine to incorporate a parking area for a raise climber, said access drift extending away from a lower end of a raise, said method comprising:
installing in a recess in said access drift, one or more transfer rails extending from a discontinuity between a pair of existing rails supported in said access drift, and away from said access drift and into said recess, said pair of existing rails being spaced end to end from one another to provide said discontinuity;
providing a length of rail sized to fit in series with, and in between said pair of existing rails in said discontinuity, to provide continuity between said existing rails and said length of rail, and thereby permit said raise climber to drive from said length rail onto either of said existing rails;
providing one or more supports extending upwardly from said length of rail and positioned along said length of rail to be aligned with corresponding transfer rails;
providing a trolley on each support, each trolley configured to suspend from and be moveable along said corresponding transfer rail; and
suspending said length of rail from said transfer rails by suspending each trolley from a corresponding transfer rail.
13. The method according to claim 12 wherein said installing comprises rock bolting said transfer rails to a back of said recess.
14. The method according to claim 12 wherein one of said trolleys comprises a drive system.
15. The method according to claim 14 wherein said drive system is air powered and further comprising providing an air supply to said drive system and providing a control box for controlling movement of said powered trolley along a corresponding transfer rail.
16. The method according to claim 15 further comprising tethering said air supply to a cable for guiding said air supply during movement of said transfer assembly.