The invention relates to an anchoring device wherein a positioning plate (5), intended for bearing on the ground surface, is mounted onto a hollow rod (2). The rod consecutively supports, from the positioning plate (5) to the free end (22), at least one helical force disk (6) then one helical penetration disk (8). Said anchoring device is characterized in that the rod extends after the helical penetration disk opposite the plate (5). Said anchoring device is moreover characterized in that a bit (4) is placed on the free end of said rod so that a first portion of the rod (2), capable of being screwed into at least one first ground layer, extends from the plate (5) to the helical penetration disk and moreover so that a second portion of the rod (2), capable of being anchored in a second ground layer, extends from the helical penetration disk (8) to the bit (4).

An injection driver assembly may be used to install hollow bar bolts. The injection driver assembly may include a socket that can be rotated to drive hollow bar bolts into a wall or other structure. The injection driver assembly may also include a housing assembly that allows hardening product to be injected into a hollow bar bolt while the socket is positioned overtop the hollow bar bolt and remains capable of rotating.

The invention provides a breather tube indicator device which includes a sealing body which is adapted to fit within a breather tube of a grouted rock support installation to allow passage of air past the body, without the body moving relatively to the tube, but to resist passage of an adhesive material thereby to cause movement of the body relatively to the tube to an indicating position.

The present invention relates to a method, and an arrangement for mounting bolts in a material. The method comprises: storing actual data representing the actual positions of bore holes having been bored in the tunnel wall by a drill rig (300), a control unit (800) instructing a bolting device (200) to mount bolts in the bore holes based on the stored actual data.

The present disclosure is directed to a resin injection system for a mining operation that includes a first tank configured to hold a first viscous fluid, a second tank configured to hold a second viscous fluid, a wand in communication with the first tank and the second tank, a first pump configured to drive the first viscous fluid from the first tank to the wand, and a second pump configured to drive the second viscous fluid from the second tank to the wand. The wand is configured to extend or retract from an initial position and to inject the first viscous fluid and the second viscous fluid into a hole. The first pump and the second pump are configured to operate independently.

A grout plug with a gasket. The plug can be cylindrical with one or more cavities therein.

A grouting tool includes a body element having a body element leading end and a body element trailing end. A collet member having a collet member trailing end in fluid communication with the body element leading end, and a collet member leading end having a hollow passage adapted to receive a grout tube. A grout injection port is secured to the body element trailing end. A portion of the collet member is radially compressible to provide a clamping force adapted to secure the grout tube to the grouting tool.

A resin input nozzle (10A) which is adapted to engage or connect to a hollow resin-anchored rock bolt (12) to introduce a resin composed of a plurality of resin components (A,B,C), into and through the bolt, the nozzle including a body (14) with a leading end (16), a leading end portion which ends at a leading end and a trailing end (18), a first conduit (22) and a second conduit (24) formed through the body, each conduit having an outlet (28A, 28B), which opens at or adjacent the leading end, and at least one inlet (26A, 26B) which is adapted to engage with a supply of a respective resin component, wherein the outlets are spaced from one another to prevent mixing of the resin components as each emerges from a respective outlet after passage through a respective conduit.

The disclosure relates to a hollow rod shear connector for stabilizing rock layers in mining, tunnel construction, civil engineering and rock construction, at least having a connector base with one or more outlet channels and a hollow rod which can be fastened to the connector base and comprises a static mixing apparatus adjoining the connector base, a cartridge, divided by a partition into two compartments, for receiving chemical fastening means, and a two-part plunger corresponding to the compartment division, wherein the static mixing apparatus consists of a plurality of mixing elements one behind the other, wherein the flow direction of the chemical fastening means is changed by greater than or equal to 150 and less than or equal to 210 at least twice along the static mixing apparatus. The present disclosure also relates to a method for setting a hollow rod shear connector in a rock layer.

A zonal bolt-grouting support device and method for cataclastic rock mass large deformation of a high-stress tunnel, the method includes: drill holes in surrounding rock of a tunnel against a tunnel face after rock mass excavation, install high-strength prestressed anchor members, apply a preload to anchor bolts when expansion anchoring agent is fully expanded and has a certain strength, and zonally grout the surrounding rock after stress adjustment. The high-strength prestressed anchor member comprises an anchor bolt, an expansion anchor agent, a decoupling material, a grouting device, a reverse anti-skid device, etc. The grouting device consists of a shallow grouting steel pipe, a deep grouting steel pipe and a grouting stop valve, and the grouting steel pipe is arranged side by side with the anchor bolt in a drill hole. The technical proposal of the invention effectively inhibits the large deformation of a cataclastic rock mass.