Abstract: A mine bolt for a bore hole in a roof of a mine. The bolt comprises a tube having a cross-sectional diameter less than that of the bore hole, a hollow interior, a first end, and a second end having an opening in communication with the hollow interior. The bolt comprises a flange disposed adjacent to the second end. The bolt can include an anchor means implaced in the tube and an elongated member disposed in the tube and extending from the anchor means out the tube to the second end. A method for supporting a mine roof. A method of forming a mine bolt.

Abstract: The present invention pertains to a mining support for supporting rock within a mine. The mining support is constructed of a cable and means for mixing resin in a resin cartridge as the cable is inserted into a bore hole drilled in the rock which the resin cartridge is disposed. In a preferred embodiment, the mixing means is comprised of a helical mixing strand which is fixedly attached to one end of the cable. The mining support can include a drive ferrule, swaged onto the cable, for driving the end of the cable into the bore hole. In a preferred embodiment, the drive ferrule is threaded and there is included a hex nut washer and contact plate for tensioning the cable after the resin has set. The present invention also pertains to a drive tool for driving a metal cable having drive ferrules disposed in proximity to either end of the cable into a bore hole containing a resin cartridge.

Abstract: The present invention pertains to a mining support for supporting rock within a mine. The support includes a cable and a threaded shaft fixedly attached to a first end of the cable. There is also an expansion anchor threadingly engaged about the threaded shaft for anchoring against the rock within a bore hole and means for bearing against the rock at the opening of the bore hole. The bearing means preferably includes a second collar having a threaded portion on which a hex nut is mounted and a contact plate for bearing against the rock. Preferably, there is a first collar for fixedly attaching the cable to the threaded shaft. Alternatively, the threaded shaft has a cavity for engaging with the cable. In a preferred embodiment, the mining support includes means for mixing resin in a resin cartridge. The mixing means is positioned about a portion of the cable. The mixing means preferably includes a helical wire strand that wraps about a portion of the cable.

Abstract: The present invention is a wrench device for installing a mine roof bolt. The device comprises a body portion having a socket end for holding and turning a nut of the mine roof bolt. There is also a retractable bolt stoppage mechanism engaged through the body portion. The bolt stoppage mechanism when raised prevents the bolt from threading onto the nut during resin mixing so as the nut is turned, the bolt is also turned. In a preferred embodiment, the body portion has a hollow central cavity which extends into the socket. The bolt stoppage mechanism can comprise a head portion and a rod portion slidably engaged within said central cavity. The bolt stoppage mechanism can also comprise a spring for biasing the stop member away from the socket end.

Abstract: The present invention is a system for supporting rock within a mine having a bore hole. The system comprises a mining bolt having a round metal tube which has a completely hollow interior and all cross sectional dimensions less than that of the bore hole. The metal tube has a first end and a second end which are swaged closed to permanently close off the completely hollow interior so the bolt can crush and deform during movement of the rock when in place therein. The swaged second end has a square cross section to allow a tool to turn the mining bolt in the bore hole from the second end. The mining bolt has a metal washer flange fixedly attached to the metal tube adjacent to the swaged second end. The system also comprises a bearing plate disposed between the rock and the flange and a resin cartridge for bonding the mining bolt to the rock within the bore hole.

Abstract: The present invention pertains to a mining support for supporting rock within a mine. The mining support is constructed of a cable and means for mixing resin in a resin cartridge as the cable is inserted into a bore hole drilled in the rock which the resin cartridge is disposed. In a preferred embodiment, the mixing means is comprised of a helical mixing strand which is fixedly attached to one end of the cable. The mining support can include a drive ferrule, swaged onto the cable, for driving the end of the cable into the bore hole. In a preferred embodiment, the drive ferrule is threaded and there is included a hex nut washer and contact plate for tensioning the cable after the resin has set.

Abstract: The present invention pertains to a mining support for supporting rock within a mine. The support includes a cable and a threaded shaft fixedly attached to a first end of the cable. There is also an expansion anchor threadingly engaged about the threaded shaft for anchoring against the rock within a bore hole and means for bearing against the rock at the opening of the bore hole. The bearing means preferably includes a second collar having a threaded portion on which a hex nut is mounted and a contact plate for bearing against the rock. Preferably, there is a first collar for fixedly attaching the cable to the threaded shaft. Alternatively, the threaded shaft has a cavity for engaging with the cable. In a preferred embodiment, the mining support includes means for mixing resin in a resin cartridge. The mixing means is positioned about a portion of the cable. The mixing means preferably includes a helical wire strand that wraps about a portion of the cable.

Abstract: A mining bolt for holding rock comprised of an elongate shaft at least a portion of which has threads. The threads directly thread into the rock and are capable of supporting the bolt under tension in the rock. The mining bolt is also comprised of a flange system disposed about the shaft in proximity to one end thereof such that when the shaft is threaded into the rock, the flange system abuts under tension the rock's face. A method for holding rock in a mine comprising the steps of drilling a bore hole into the rock; and inserting the shaft of a mining bolt into the bore hole. The shaft has a flange system disposed about the shaft in proximity to the end thereof. The shaft has threads and is of a length longer than the length of the bore hole. There is also the step of screwing the shaft into the rock at the top of the bore hole such that the threads of the shaft penetrate into the rock and the flange abuts under tension the rock face.

Abstract: A mine roof anchor assembly usable with a quick-setting resin cartridge inserted into a mine roof opening includes a partially threaded elongated bolt having a head at one end, a bail-type mechanical anchor at the threaded end, and an elongated helical coil having an upper end attached to the bolt and positioned external of and surrounding a substantial length along the bolt. A bearing plate and a two-faced washer can be positioned on the bolt head. Both sides of the washer may be coated with a dry lubricant such as graphite suspended in a resin base.

Abstract: The anchor bolt assembly is of the tensionable type used in mine roofs and the like in which the anchor bolt assembly is positioned in a bore hole of a rock formation. The bolt assembly includes an elongated bolt shaft with a head at one end and is threaded on the other end and has a mechanical expansion anchor on the threaded end. A bearing having a central opening is positioned on the bolt to engage a face of the rock formation. A two faced graphite coated washer is positioned on the bolt between the bolt head and the bearing plate. During installation, the washer acts as an anti-friction bearing between the bolt head and the plate to improve the torque to tension relationship.

Abstract: A reinforcing washer for use in a mine roof bolt assembly comprising a roof bolt having a shaft portion, an embossed bearing plate having a surface which substantially contacts the mine roof, an opposite surface and an aperture through which the roof bolt extends, said washer comprising a rigid member having a first surface shaped to substantially contact and complement the opposite surface of the bearing plate, an opposite surface and an aperture through which the roof bolt extends. Preferably, the shape of the embossed bearing plate and the rigid member is a cup or donut. Most preferably, the washer has a substantially uniform thickness and is manufactured from hardened steel.

Abstract: The anchor bolt assembly is of the type used in mine roofs and the like in which the anchor bolt assembly is positioned in a bore hole of a rock formation. The bolt assembly includes an elongated shaft having a frustoconical shaped plug at the upper end of the shaft and a head on the lower end of the shaft. A quick-setting resin cartridge is positioned in the bore hole above the plug of the bolt shaft and the bolt assembly is secured to the rock formation by at least the resin. The anchor assembly includes a helical coil external of, surrounding and connected to the bolt shaft for mixing the resin and urging it upward toward the plug end while the bolt shaft is rotated in one continuous direction. The helical coil is disposed below the conical plug and extends a substantial length along the bolt shaft to achieve the mixing.

Abstract: A truss bracket for use in a mine roof support system using double tie bars. The truss bracket comprises a substantially flat, planar member for engagement with the mine roof, and an extension depending normal to the planar member. The extension has an angularly disposed channel in communication with an aperture in the planar member. The channel and aperture accommodate a rib or anchor bolt for attachment of the truss bracket. The extension also includes a pair of openings spaced from each other and from the planar member. Each of the openings accommodate a tie bar in parallel relationship to the planar member and to each other. Most preferably, the truss bracket further comprises a tie bar support ring angularly attached to the planar member to accommodate a tie bar in the event of sagging.

Abstract: The anchor bolt assembly is of the type used in mine roofs and the like in which the anchor bolt assembly is positioned in a bore hole of a rock formation. The bolt assembly includes an elongated bolt shaft with a head on one end and is threaded on the other end and has a mechanical expansion anchor on the threaded end. A quick-setting resin cartridge is positioned in the bore hole above the threaded end of the bolt shaft and the bolt assembly is secured to the rock formation by both the expansion anchor and the resin. The anchor assembly includes a helical coil surrounding the bolt shaft for mixing the resin and urging it upwardly toward the threaded end while the bolt shaft is rotated in one continuous direction to secure the mechanical anchor to the rock formation. A method of anchoring such a bolt assembly is also disclosed.

Abstract: The anchor bolt assembly is of the type used in mine roofs where the anchor bolt is assembled and positioned in a drill hole in a rock formation and in which quick-setting adhesives secure the assembly to the rock formation. The assembly includes an elongated reinforcing rod, an elongated bolt, and a coupling internally threaded at each end and connected to the rod and bolt. A cylindrical plug of aluminum is positioned within the bore of the coupling and frictionally engaged by the threads so as to permit the entire assembly to turn in a first position and to disengage from its frictional engagement to permit turning of only the elongated bolt in a second position.