A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube. The anchor is secured to the elongated body. The anchor is configured to compress upon installation of the mine bolt to anchor the elongated body within a bore hole.

A method and an apparatus for rock reinforcement are described. The method comprises the steps: to inject a first component and a second component through a first channel and a second channel respectively into a rock hole, wherein the first component and the second component are adapted for rock reinforcement and to inject a blocking agent through a third channel into at least said second channel, wherein said blocking agent provides a barrier in at least said second channel.

The present application relates to a system for supporting a roof of a portion of a mine. The system includes a first plurality of stabilizing members disposed above the roof at a first elevation. The first plurality of stabilizing members originate from a first common location and terminate at a second elevation that is higher than the first elevation. The system further includes a second plurality of stabilizing members disposed above the roof and the first plurality of stabilizing members at a third elevation. The second plurality of stabilizing members originate from a second common location and terminate at a fourth elevation that is higher than the third elevation. The second plurality of stabilizing members are disposed generally perpendicular to the first plurality of stabilizing members.

This invention puts forward a sectional modular large-deformation-resistant impact-resistant composite rock bolt and its assembling method. The outer anchor module of this composite rock bolt consists of the outer anchor end, anchor tubes and anchor piers, all of which are bonded with the borehole wall through the anchorage agent to act as a full-grouted bolt. And the inner anchor module consists of the outer anchor end, anchor piers, springs and threaded rod. The threaded rod, under the traction by the outer anchor end, presses the inner anchor springs to distribute the anchoring force to the anchor piers, which then pass such force as a pressure to the anchoring agent, thus playing the role of a pressure-dispersive anchor. Before the failure of the anchor tube, the inner anchor module is in parallel with the outer anchor module, playing the role of auxiliary anchorage on surrounding rock; after the failure of the anchor tube, such structure can yield and buffer effectively against the surrounding rock and realize secondary high-strength support timely.

An anchoring device and method of securing an anchoring device to strata are disclosed. The anchoring device (1) includes a drilling rod (2) and an anchoring sleeve (3) at least partially surrounding the drilling rod (2), the drilling rod (2) comprising a driving end (31) for coupling to a drilling apparatus and a drilling end (32) with a drilling head (26) for drilling a hole in strata, wherein the device is configured to be coupled with and driven by a drilling apparatus to cause the drilling head (26) to drill a hole into strata and to force, as the hole is drilled, the anchoring sleeve (3) into the hole to an inserted position in which the anchoring sleeve (3) engages the surrounding strata.

This invention puts forward a sectional modular large-deformation-resistant impact-resistant composite rock bolt and its assembling method. The outer anchor module of this composite rock bolt consists of the outer anchor end, anchor tubes and anchor piers, all of which are bonded with the borehole wall through the anchorage agent to act as a full-grouted bolt. And the inner anchor module consists of the outer anchor end, anchor piers, springs and threaded rod. The threaded rod, under the traction by the outer anchor end, presses the inner anchor springs to distribute the anchoring force to the anchor piers, which then pass such force as a pressure to the anchoring agent, thus playing the role of a pressure-dispersive anchor. Before the failure of the anchor tube, the inner anchor module is in parallel with the outer anchor module, playing the role of auxiliary anchorage on surrounding rock; after the failure of the anchor tube, such structure can yield and buffer effectively against the surrounding rock and realize secondary high-strength support timely.

A rock bolt dolly for connecting a self-drilling rock bolt to a rock bolting apparatus includes a drive shaft having a central bore and defining a proximal end and a distal end defining an engagement means for engagement with a corresponding engagement means located on the proximal end of the rock bolt. A sleeve is mounted over the distal end of the drive shaft and arranged to slide along and over the drive shaft and defines a female engagement means at a distal end, for engaging with a nut threaded onto the proximal end of the rock bolt. The interior of the sleeve and exterior of the drive shaft are configured to rotate together about their central axis. A spring biases the distal end of the sleeve away from the distal end of the drive shaft. The dolly operates in two modes, one in which the nut and rod rotate together, and a second where the nut rotates on the rod.

A rock bolt device that includes a non-anchoring elongation section that allows elongation of the rock bolt device under tensile load to accommodate rock movement after installation of the rock bolt device.

A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube. The anchor is secured to the elongated body. The anchor is configured to compress upon installation of the mine bolt to anchor the elongated body within a bore hole.

A setting device for a self-drilling anchor bolt of the present invention includes: a drive shaft, one end thereof having a shank for connecting to an impact tool, and another end being a setting part for pushing the self-drilling anchor bolt axially; a coupling, partially surrounding the drive shaft along an axis, and being supported on the drive shaft in such a way as to be incapable of relative rotation while being axially moveable at least locally; and a releasable locking component, disposed between the drive shaft and the coupling; in a locked position, the locking component is coupled to an extremity of an anchor rod such that the anchor rod is fed axially with rotational striking into a receiving material, and in a released position, the drive shaft strikes a sleeve to advance axially along the anchor rod and expand at an expansion part.