Shaft boring machine and method

Details Shaft boring machine and method Shaft boring machine and method

E - Fixed Constructions

21

C

262/7

E21C 41/00 (2006.01) E21C 47/00 (2006.01) E21D 1/06 (2006.01)

Patent

CA 1238926

ABSTRACT OF THE DISCLOSURE A shaft boring machine (10) including a rotatable cutterwheel assembly (12) with a horizontal axis mounted on a carriage (102) having vertical travel. The carriage (102) is mounted on a slewing base frame (110) and rotates about the vertical axis (64) of the machine. An excavating unit (48) for muck removal is mounted opposite the cutterwheel (12) on the slewing base frame (110) and loads directly from the shaft bottom into a muck hopper (24). When the hopper (24) is full, it is discharged into a hoist bucket (68) which is hoisted to the surface. The machine is positioned in the shaft by upper and lower gripper systems (44 and 34). Walking cylinders (40) between the two gripper rings (46 and 38) advance the machine up or down the shaft (15). A method of boring vertical shafts in medium and hard rock which includes the steps of: (a) providing, radially of the shaft (15), a cutterwheel assembly (12) for cutting the rock; (b) while rotating the cutterwheel assembly (12) about its horizontal axis, plunging the rotating cutterwheel (12) downwardly into the rock; (c) slewing the rotating cutterwheel assembly (12) around the rock work face (13) and about the central vertical axis (64) of the shaft; and, (d) removing the rock cuttings (23) from the work face (13).

486532

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