Abstract: A mine roof bolt assembly (10) comprises a bolt (20), a bearing plate (30), and a washer (40) situated between a ledge (24) of the bolt (20) and a lower face (33) of the bearing plate (30). The washer (40) includes an elbow (42), a radially inner portion (43) extending upward from the elbow (42), and a radially outer portion (44) sloping upward from the elbow (42). The elbow (42) engages an inboard location of the bolt ledge (24) so as to reduce stress on the flange (23) of the bolt (20).

Abstract: An anchor fitted with a self-tapping thread and an anchor rod, whereby at least one axially oriented feed channel for a curable compound is arranged in the anchor rod. A head element on which the self-tapping thread is arranged is fastened to a first end of the anchor rod.

Abstract: A rock bolt includes an elongate tubular body with an internal bore. A filler material is insertable into the internal bore at one end of the elongated tubular body. The end of the tubular body is then deformed thereby using the filler material to seal the end of the bore. The filler material may be a non-metallic material, such as a tube of plastic.

Abstract: An anchorable mine support for anchoring in a borehole with resin or grout. The anchorable mine support comprises a tensionable elongate metal member and a sleeve disposed on at least a portion of the tensionable elongate metal member. The sleeve has a thickness of less than about 1 mm. A method of reducing frictional resistance between a tensionable elongated bolt and a hardened resin nut in a borehole formed in a face of a mine passage. The method reduces the frictional resistance between a tensionable elongated bolt and a hardened resin nut, thus improving the ability to tension a tensionable elongated bolt and stabilize a rock formation or structural body.

Abstract: A subsurface support is provided comprising a soil nail having an outer member and an inner member placed within the outer member. The soil nail includes features that maintain a uniform spaced relationship between the inner and outer members. The soil nail may be installed by drilling or launching through a launching device. The spaced relationship between the inner and outer members may be achieved by crimping the outer member, or by use of an insert installed between the inner and outer members. In other embodiments, the support is made of composite construction materials, and having a self-drilling capability. The soil nail has two primary members, namely, an outer threaded member, and an inner threaded member that is placed through the outer member The outer member is made from fiberglass, and a metallic drill bit is secured to a distal end of the soil nail. The inner member is preferably steel.

Abstract: A hollow rock bolt comprising a shaft having a spiral form protruding from the exterior surface of the shaft, wherein the spiral form has a flank angle of between 30° and 60°.

Abstract: A screen-handling stinger extends and retracts hydraulically from within a bore of a hydraulic stinger of a rock bolter. The screen-handling stinger has a finger that engages a screen. The screen-handling stinger retracts the screen until it snugly abuts the front face of a pad of the stinger. The screen can then be rotated by the rotation motor of the stinger.

Abstract: A cutting device for use with installation of helical ground anchors designed to cut through rock. The invention has carbide steel cutting tips attached to the distal end of a shaft extending below the end in order to make a first cut through rock along the axis of rotation of the shaft. Helically shaped plates are attached to the shaft at a distance above the shaft set of cutting tips. Attached along the outer edge of the helix are additional carbide steel cutting tips that extend below the bottom surface of the helix and cut along the axis of rotation of the shaft. The present invention allows for the installation of helical ground anchor supports at proper depths without deviation, in situations where the path is obstructed by rock or other hard materials.

Abstract: In one aspect of the invention, an apparatus and related methods for installation in a borehole formed in a face of a mine passage comprises an elongated bolt including a spiral portion coated with a lubricity agent for positioning in the borehole; preferably, a fixing agent as well; and most preferably, a colored fixing agent. A hardened, stationary resin nut formed in only part of the borehole, preferably spaced from the distal end thereof, my receive the spiral portion of the bolt. Consequently, rotation of the spiral portion within the hardened resin nut serves to move the bolt within the borehole, such as for purposes of tensioning.

Abstract: An apparatus and method for forming a borehole in an earthen formation includes a side cutting device comprised of a laterally extendable side cutting element that can be actuated from a retracted position to an extended position in which the side cutting element is selectively employed to create a larger borehole diameter in a down hole location than the remaining portion of the borehole that is closer to the borehole opening.

Abstract: A constant-resistance and large deformation anchor cable and a constant-resistance device are provided. The constant-resistance and large deformation anchor cable comprises cables (7), an anchoring device (13), a loading plate (12) and clipping sheets (4). The upper end of cables (7) is fixed on the anchoring device (13) and the loading plate (12) by clipping sheets (4). The constant-resistance and large deformation anchor cable also comprises a constant-resistance device, and the constant-resistance device comprises a sleeve (8) and a constant-resistance body (5). The sleeve (8) is a straight tube. The constant-resistance body is conical, and the diameter of the lower end of the constant-resistance body is bigger than the diameter of the upper end of the constant-resistance body. The inner diameter of the sleeve (8) is smaller than the diameter of the lower end of the constant-resistance body.

Abstract: A rock bolt includes an elongated tubular shank which has a defined outer diameter in which has a first end and a second end. A component is received on the first end of the elongate tubular shank and is fixed to the shank by welding. The component can be externally threaded and can be configured to be threadably engaged by a nut.

Abstract: A bolt includes a tube, at least a portion of which is hollow, having a top and the bottom and at least one dimple. The bolt includes an insert fixed to the interior of the tube in proximity to the dimple with the dimple disposed between the insert and bottom of the tube. A method for a bolt includes the steps of inserting a resin cartridge into a hole.

Abstract: A pole with an eyelet disposed at one end and the first and second group of furled cup shaped furled containers are connected along the longitudinal length of the pole. The pole with the containers is inserted into a substance. The substance may, if desired, be sand, mud or mud-like soil. If desired, the insertion process may be accomplished by forcing the pole into the substance by applying downward force on the eyelet or twisting the pole in a clockwise direction into the substance. Once the pole is inserted into the substance the pole may, if desired, be twisted in the counterclockwise direction to unfurl the cup shaped containers. To extract the pole, the pole is twisted in the clockwise direction closing the cup shaped containers and pulling the pole in the vertical direction.

Abstract: A ground anchor system shaped and dimensioned for secure attachment within a support surface. The ground anchor system includes a primary anchor body extending along a longitudinal axis and including a first end and a second end. A coupling member is associated with the first end of the anchor body. A fastening assembling extends from the second end of the anchor body, the fastening assembly being composed of a plurality of downwardly extending facets, wherein each facet includes a first end and a second end. The first end of each facet is secured to the second end of the anchor body and the second end extends away from the anchor body.

Abstract: A cable bolt includes a cable having a first end and a second end, and a barrel and wedge assembly attached to the cable at a position adjacent to the first end of the cable. The barrel and wedge assembly has a first end and a second end. The cable bolt also includes a nut positioned adjacent to the first end of the barrel and wedge assembly and defines a sealed interface therebetween. The nut defines a passageway in fluid communication with the cable.

Abstract: The invention provides an injection, sealing, valving and passageway system for use with hollow rock bolts and hollow injection bars used in mining, civil engineering, tunneling and construction including use with hollow self drilling rock bolts. The invention comprises a plurality of passageways with one or more one way flow valves along the passageways. The invention enables one or more fluids to be pumped into a hollow rock bolt or other hollow elongate member either sequentially or simultaneously without cross contamination of fluids in another passageway or back flow of fluids along the wrong passageway. The invention is typically used to install self drilling rock bolts whereby a drilling fluid is initially pumped through the hollow bolt during the drilling cycle, and then a two part chemical resin or cement grout is pumped through the hollow bolt to anchor the bolt in the borehole.

Abstract: Tie fastening devices, systems apparatus, and methods of fastening and staking concrete cloth, and landscape and erosion control stabilizer sheets and timbers in place with a drill adapted fastener. The fasteners can elongated with anvil top ends that can be mounted to a drill chuck and lower cutting heads with arrow shaped blades that can raised burr edges for driving into ground surfaces.

Abstract: A reinforcement system includes an adapter, a friction bolt, a drilling rod coupled to the adapter, and a drill bit configured to drill an opening optimally sized for receiving the friction bolt. The drilling rod has a diameter that allows for introduction of the drilling rod into the friction bolt.

Abstract: A feed rail for a rock drill is composed of two segments, a first beam defining a first rail segment and a second beam defining a second rail segment. The second beam may be detachably connected to the first beam so that the second beam can be removed altogether from the first beam. This invention enables the feed rail to be shortened, thereby making the feed rail much easier to manoeuvre in mines.

Abstract: An anchor includes a rotatable anchor rod an anchor plate and an anchor nut. The screw thread in the anchor nut matches the screw thread of the anchor rod only over part of the screw thread hole. Thus the anchor nut can only be screwed some way further onto the anchor rod, and up to a predetermined torque can be used for rotating the anchor rod during placement of the anchor. As soon as the anchor rod is firmly seated in the drill hole, as a result of the action of adhesive, mortar or expansion or spreading, the anchor rod forms a through-thread in the screw thread hole when the anchor nut is rotated relative to the anchor rod, and consequently the anchor nut can finally be screwed onto the anchor rod until it affixes the anchor plate in its final position to the ground.

Abstract: A cable bolt lifting and feeding device that is a lightweight unit that mounts into a drill rig rotation unit. The device uses the mechanical power provided in the rotation unit to drive a set of wheels that engage with the cable bolt, causing the cable bolt to be pushed through the device and into a pre-drilled hole.

Abstract: A mine roof bolt includes an elongated rod and a polymer coating layer. The elongated rod has a first end and a second end with a protruding portion extending radially outward from the elongated rod. The polymer coating layer covers at least a portion of the elongated rod between the first and second ends. The elongated rod is movable relative to the polymer coating layer in an axial direction. The elongated rod has a first position where the elongated rod has a predetermined axial position relative to the polymer coating layer and a second position where the elongated rod has a displaced axial position relative to the first position.

Abstract: A bolting apparatus and method for inserting a rod into a surface, the bolting apparatus including a base having a foot end and a head end, at least one stabilizing rod extendable from the base head end and having a stabilizing rod end adapted to contact a surface to be drilled, and a mechanism attached to the base between the base foot end and the stabilizing rod end and adapted to grip the rod.

Abstract: A compact apparatus for providing a substantially pressure-tight connection between a source of a plastics component and an opening of an inner channel of a rock bolt. The apparatus includes a central block moveable to be aligned with the rock bolt, a supply pipe slidably arranged in the central block, a first force transmitter, a gripper for attaching the central block to the rock bolt, a gripper drive slidably mounted on the central block and arranged to operate the gripper, and a second force transmitter, such that the first force transmitter is arranged to press the supply pipe onto the opening of the inner channel of the rock bolt. The gripper is mounted on the central block, and the second force transmitter is arranged to operate the gripper drive to force the gripper to clamp the central block onto the rock bolt.

Abstract: A rock bolting system comprises independently movable hydraulic stinger, drill feed and bolting feed. The stinger is hydraulically extended to sting or engage the face of the rock. With the stinger stinging the rock face, the drill feed drills a hole in the rock. With the stinger still stinging the rock face, the bolting feed is indexed into position and a rock bolt is installed in the hole. A flexible elastomeric bolt centralizer may be mounted to the bolting feed to guide the rock bolt into the hole drilled by the drill feed.

Abstract: An anchor system for an erosion control mat is provided. The system includes a bullet anchor comprising a bullet anchor body and a bullet anchor strap integrally molded with and extending from a first side of the bullet anchor body. In embodiments, a lock washer is coupled to the bullet anchor strap. In embodiments, serrations on at least one side of the bullet anchor strap are adapted to prevent the lock washer from traversing the bullet anchor strap in a direction away from the bullet anchor. In embodiments, the lock washer is adapted to couple with an erosion control mat. In embodiments, an anchor tab on a second side of the bullet anchor body secures the bullet anchor body in a ground surface. The anchor system is utilized to secure the erosion control mat to the ground surface and prevent undesired movement of the erosion control mat.

Abstract: A low profile tensionable bolt cable system and method of installation. The tensionable bolt cable has a tension cylinder with a constant diameter throughout its length and a threaded exterior. A bearing plate is provided with an opening and a first mating member. The tension cylinder has a proximal and a distal end with the proximal end having an angled interior surface and a longitudinally extending second mating member. The first and second mating members mate when the tension cylinder is inserted into the bearing plate. Angled wedges are inserted into the angled interior surface. A cable is inserted into the tension cylinder and between the wedges to hold the cable with respect to the tension cylinder to prevent the cable from twisting. A nut is threaded onto the tension cylinder, to tension the cable.

Abstract: A threaded rod comprises a single coarse thread having flattenings on opposite sides forming thread sections on opposite sides. At least one of the thread sections on one side of the threaded rod is omitted.

Abstract: A rock bolt component includes an elongate tubular section with an internal bore. A fixing member has an elongate body that includes a securing portion positionable in the internal bore of the tubular section and a coupling formation which projects from an opposite end of the fixing member. The fixing member is securable by deformation of an end of the tubular section, once the securing portion of the fixing member has been inserted into the end of the tubular section.

Abstract: A mine roof bolt assembly (10) comprises a bolt (20), a bearing plate (30), and a washer (40) situated between a ledge (24) of the bolt (20) and a lower face (33) of the bearing plate (30). The washer (40) includes an elbow (42), a radially inner portion (43) extending upward from the elbow (42), and a radially outer portion (44) sloping upward from the elbow (42). The elbow (42) engages an inboard location of the bolt ledge (24) so as to reduce stress on the flange (23) of the bolt (20).

Abstract: A cable bolt comprising a tension member having a first end and a second end. A rotatable collar is positioned on the tension member and is rotatable relative to the tension member. An elongate sheath, having a first end and a second end, is disposed over at least a portion of the tension member and secured to the rotatable collar. A method of securing an anchor in a structure is also disclosed.

Abstract: Alpine anchor for anchoring threaded rods in soil or rock, with a metal base plate having a number of threaded bores which are distributed about the circumference and into which the threaded rods can be screwed with an assembly machine, wherein at least one plug coupling is arranged between the stationary part of the assembly machine and the base plate.

Abstract: A tandem plate for use with a friction rock stabilizer of the kind that includes an elongated metal tube driven into a bore drilled in a rock wall and having an end adapted to engage a bearing plate. The tandem plate includes a substantially planar metal sheet having an upper surface, a lower surface and an overall dimension which is larger than the size of the bearing plate. An opening adjacent the center allows the tube to pass therethrough. The lower surface engages the rock wall while the upper surface of the tandem plate engages the bearing plate. A tabs on the upper surface, formed by punching and bending parts of the planar sheet from which the tandem plate is made, engage the bearing plate while the tube is being driven into the bore. A plurality of ribs formed on the tandem plate increase the strength thereof.

Abstract: An open mat system to reinforce turf includes an anchor arrangement to help secure the mat to the turf. The anchor arrangement includes an anchor head embedded in the earth, a cable connected to the anchor head, a cable connector device, and a brace. The cable is inserted into the connector device, which holds the cable against withdrawal from the connector device. The brace includes a receiver, in which the cable connector device is removably oriented in the receiver.

Abstract: A cable bolt button comprising a continuous sidewall having a first end, a second end and an end portion attached to the first end of the sidewall, forming an inner cavity. The cable bolt button forms an interference fit between the sidewall of the cable bolt button and a cable bolt when the button is placed over the distal end of the cable bolt. The cable bolt button may also include a plurality of protrusions extending outwardly from the end portion away from the inner cavity and/or at least one recess. The protrusions may be separate features of the end portion or the first end of the sidewall may have a non-linear profile with the periphery of the end portion following the profile of the sidewall to form the protrusions and recesses. The end portion may also comprise a plurality of intersecting surfaces further shaping the protrusions and recesses.

Abstract: A ground stabilising device (10) comprises a securing arrangement (16) and a load spreading arrangement (18) on the securing arrangement. The securing arrangement defines a through passage (40) for an elongate article (12). The securing arrangement comprises a guide member (54) extending towards the passage, and a clamping assembly (38). The clamping assembly is movable along the guide member towards the passage to clamp the elongate article in the passage and secure the elongate article to the ground stabilising device.

Abstract: A machine (23) that is operable to drill passages in a surrounding rock layer and insert bolts therein. The machine (23) is operated by an operator (24) that stands on a platform (25) that is preferably secured to a rail upon which the machine (23) moves.

Abstract: Disclosed is a rock bolt comprising an elongate shaft extending between opposite leading and trailing ends and a deformed section disposed proximal to the leading end, the deformed section being configured such that a protrusion extends outwardly beyond an outer surface of the shaft.

Abstract: A chemical anchoring assembly useful for fast application of a driving tool into a borehole includes an elongated tube having a first end and a second end, a quantity of chemical anchoring material within the elongated tube, and a vent at the second end of the elongated tube. As an anchor pin is driven through the elongated tube and into the borehole, forcing the chemical anchoring material into the borehole, some of the pressure caused by compression of the chemical anchoring material is released into the vent, allowing easier driving of the anchor pin.

Abstract: A rock bolt is for use in stabilizing a rock face. The rock bolt comprises a body having a plurality of elongate lobes spaced apart by substantially resilient channel means. The rock bolt is further configured to receive expansion means for urging the lobes outwardly to thereby expand the rock bolt for improving a communication with a bore hole in the rock face. Following expansion the expansion means may be removable, the expansion means can comprise any suitably sized hollow or solid bar expansion member. The configuration of the present invention also enables, subsequent to an initial expansion, the resilient channel means to provide a gripping force on any suitably sized member inserted into the internal space. This feature of the rock bolt allows for a mesh plate having an elongate portion to be securely and removably fitted to the rock bolt after the rock bolt has been expanded.

Abstract: A cable bolt has a multi-strand cable, and a sleeve having at least one open end. The sleeve has an outer surface and an inner surface. The outer surface of the sleeve is at least partially threaded. An end portion of the multi-strand cable is disposed inside the sleeve. A bonding material is disposed between the inner surface of the sleeve and an outer surface of the end portion of the multi-strand cable. The bonding material bonds the sleeve to the multi-strand cable.

Abstract: A mine roof support includes a substantially dome-shaped plate including a curved portion having a first side and a second side. The mine roof support includes a drive end such as a barrel and wedge assembly, a nut or a forged head. The first side of the plate is adapted to mate with a recess defined in a mine roof. A top portion of the drive head may be contoured to substantially match the contour of the second side of the plate. A drill bit tool used to create the recess includes a first drill bit situated at one end of the drill bit tool and a second drill bit situated near an opposite end of the drill bit tool, wherein the drill bit tool is adapted to drill a bore hole and the recess. A method for supporting the mine roof utilizes the mine roof support.

Abstract: The present invention relates to a drilling tool incorporating first and second ends, a cuttable and/or processable shaft extending between the ends. The first end has a drill bit to penetrate rock. The drill bit and the shaft have complementary threads. The drill bit and the shaft comprise a relative rotation stop means that ensures that the drill bit remains loose during drilling in a first direction. The invention further relates to a self drilling rock bolt, a drill bit, drill shaft and shaft coupling, and an anchoring device per se.

Abstract: A cable bolt and related methods are provided. In one aspect of the invention, the bolt includes a sleeve for connecting or securing to a cable. A plurality of facets along a peripheral portion of the sleeve create corners that prevent the cable from rotating within the borehole during installation. The sleeve may he secured to the cable using resin.

Abstract: A bearing plate and a nut and bolt arrangement for use as a rib or roof support for coal mines where the extracted coal is used for powder coal and has a specific gravity in the range of 1.5-1.9, preferably 1.7. The bearing plate has an outer reinforced area surrounding an inner reinforced area. The outer reinforced area has one or more endless rib members and the inner reinforced area has a plurality of legs, wherein the legs are spaced from one another and the first end of each leg encircles a bolthole in a center of the bearing plate to receive the bolt of the nut and bolt assembly.

Abstract: A mine roof support assembly for anchoring in a bore hole by means of a resin, cementitious grout which includes an elongated reinforcing tendon which extends from a proximal end portion to a distal end portion. A slip sheath formed from a heat shrunk plastic, is secured by heat shrinkage radially about the tendon. The sheath is mechanically coupled to the tendon so as to allow the desired axial sliding of the tendon relative to the sheath on the application of predetermined forces which sufficient to effect any desired yielding movement of the tendon in the bore hole. An anti-bonding agent or coating and/or anticorrosive may be interposed between the sheath and the tendon, whereby the sheath substantially encapsulates and limits the admixing of the interposed anti-bonding agent/anti-corrosive coating with the resin.

Abstract: The invention relates to a sliding bolt (10) for introducing into a bore, having an anchor rod (12), on which is disposed a sliding control element (14) with a through-opening (18), through which the anchor rod (12) extends, wherein the sliding control element (14) comprises a sliding body cage (16) having at least one recess (20) for receiving a sliding body (22) that is in contact with the lateral surface of the anchor rod (12), and having an anchor plate (24), which is intended to lie against a region surrounding the mouth of the bore once the sliding bolt (10) has been introduced into the bore. In contrast to conventional sliding bolts, the anchor plate (24) is in load-transferring connection with the sliding body cage (16), with the result that it is easily possible to provide a device that indicates a sliding path of the sliding bolt that is still available.

Abstract: A rock bolt component includes an elongate tubular section with an internal bore. A fixing member has an elongate body that includes a securing portion positionable in the internal bore of the tubular section and a coupling formation which projects from an opposite end of the fixing member. The fixing member is securable by deformation of an end of the tubular section, once the securing portion of the fixing member has been inserted into the end of the tubular section.

Abstract: A stabilizing device for a load element of a ground anchor includes two plate members, wherein the plate members have a generally L-shape and are complementary and do form a generally cross shape when coupled together and when coupled together form a feed through sleeve for leading the load element there through. Each plate member includes at least one recess surrounded by plate material, which at least one recess of each plate member receives a central feed through sleeve forming plate member portion when the plate members are coupled together for forming the generally cross shaped stabilizing device.