A rock bolt dolly (10) which connects a self-drilling rock bolt (300), to a rock bolting apparatus and transfers percussive energy applied to the dolly (10) by the rock bolting apparatus (50) to the rock bolt during installation of the rock bolt in strata and rock is disclosed. The dolly includes coupling means (30a, 30b) for coupling the dolly to the output shaft of the rock bolting apparatus and a percussion plate (42) comprising an end plate (44) and integral side walls (47) defining an internally threaded recess for receiving the threaded end of the rock bolt, for applying percussive loading to the elongate hollow rod of the rock bolt (300) via the end plate and threaded side walls. The dolly also includes a body portion extending between the coupling means and the percussion plate transmitting forces from the output shaft to the percussion plate; which defines at least one passageway (136) for the passage of grout or resin from a reservoir through the rock bolt dolly and into the rock bolt.

A liner system, including a plurality of arcuate panels vertically interlocked, each arcuate panel comprising fiber reinforced composite. Each arcuate panel includes a first engagement tab disposed at a first edge of a panel frame, a second engagement tab disposed at a second edge of the panel frame, the second edge arranged opposite the first edge, a third engagement tab disposed on a third edge of the panel frame, and a fourth engagement tab disposed on a fourth edge of the panel frame, the fourth edge arranged opposite the third edge.

A liner system, including a plurality of arcuate panels vertically interlocked, each arcuate panel comprising fiber reinforced composite. Each arcuate panel includes a first engagement tab disposed at a first edge of a panel frame, a second engagement tab disposed at a second edge of the panel frame, the second edge arranged opposite the first edge, a third engagement tab disposed on a third edge of the panel frame, and a fourth engagement tab disposed on a fourth edge of the panel frame, the fourth edge arranged opposite the third edge.

Apparatus and associated methodology contemplating an excavation shoring apparatus, having a pipe sized to circumferentially enclose at least one human user working in a subterranean excavation. A plurality of channel brackets is attached to the pipe, each channel bracket forming an elongated cross-sectional profile defining a channel having a longitudinal axis extending along the channel bracket. The excavation shoring apparatus also has a plurality of selectively removable legs, each leg forming an elongated cross-sectional profile defining a beam. Each channel is configured to receivingly engage the beam in a closely-mating slidable relationship. The excavation shoring apparatus also has a plurality of removable fasteners, each connecting one of the legs to the respective channel bracket by simultaneously passing through an opening in the channel bracket and a selected opening of a plurality of openings in the leg. The selected opening in the leg corresponds to a desired position of the leg along the longitudinal axis.

A full-face shaft tunnel boring machine system includes a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling. The tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure. The vertical guide frame is a hollow cylindrical structure and driven to rotate around an axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers.

A full-face shaft tunnel boring machine system includes a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling. The tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure. The vertical guide frame is a hollow cylindrical structure and driven to rotate around an axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers.

A full-face shaft tunnel boring machine system includes a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling. The tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure. The vertical guide frame is a hollow cylindrical structure and driven to rotate around an axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers.

A system for folding and deploying liners within tunnels includes a mobile conveyor device having a base frame including a plurality of wheels supporting a support frame. The mobile conveyor device also includes a folding assembly mounted upon the support frame at a position adjacent a first end of the base frame and a conveyor assembly mounted upon the support frame at a position adjacent a second end of the base frame.

A system for folding and deploying liners within tunnels includes a mobile conveyor device having a base frame including a plurality of wheels supporting a support frame. The mobile conveyor device also includes a folding assembly mounted upon the support frame at a position adjacent a first end of the base frame and a conveyor assembly mounted upon the support frame at a position adjacent a second end of the base frame.

A system for folding and deploying liners within tunnels includes a mobile conveyor device having a base frame including a plurality of wheels supporting a support frame. The mobile conveyor device also includes a folding assembly mounted upon the support frame at a position adjacent a first end of the base frame and a conveyor assembly mounted upon the support frame at a position adjacent a second end of the base frame.