| Patent application number | Description | Published |
|---|
| 20080240868 | Mine support having a linearly moveable and/or pivoting end plate - A mine support yieldable prop includes a threaded shaft rotatably mounted in an end of the prop to move into and out of the prop end to move a bearing plate toward or away from a mine roof, and/or a bearing plate pivotally mounted to the end of the prop to level the prop with uneven mine roofs. | 10-02-2008 |
| 20080251296 | Countersink Roof Bit Drill And Method For Using The Same - A roof bit drill has a central shaft with a front end and a back end. The drill also has a base secured about the central shaft proximate to the front end, wherein the base has clearance channels extending axially therethrough. At least one cutting element is arranged on the base in a convex cutting pattern to permit loosened material to be evacuated. The roof bit drill may further include a drill depth locator to identify when the drill has been advanced within a mine roof to a predetermined depth. A method for using the roof drill bit is also disclosed herein. | 10-16-2008 |
| 20090003940 | System And Method For Mine Roof Counter Bore And Cable Bolt Head Securement Therein - A mine roof support includes a plate having a raised portion with an opening, and a mine and roof bolt, e.g. a barrel having a drive end and an opposite second end, and wedge assembly. The plate mates with a recess in a mine roof. In one embodiment, the second end of the barrel extends through the opening in the dome into a bore hole in the mine roof. In another embodiment, a second end of the mine bolt is contoured to match and fill the inner contour of the dome. A drill bit tool used to shape the recess includes a first bit, a second bit, and a third bit between the first and second bits to drill a bore hole, enlarge the end of the bore hole to receive the second end of the mine bolt, and to drill the recess. | 01-01-2009 |
| 20090041550 | Expansion bail anchor and method - An expansion anchor assembly for a mine roof bolt having a tapered plug, expansion leaves, a bail and a removable holding ring configured to hold the expansion anchor assembly in an assembled position is disclosed. The tapered plug is configured to be threaded onto the mine roof bolt and defines plug channels to encourage symmetrical resin flow past the tapered plug. The bail defines a medial opening through which the mine roof bolt extends. | 02-12-2009 |
| 20100042381 | Stress, Geologic, and Support Analysis Methodology for Underground Openings - A method of designing supports for an underground mine opening comprising the steps of: receiving mine slope information including at least one of site location, entry length, entry grade, entry orientation, size of opening, surface topology, adjacent borehole data and rock mechanics test data, historical roof fall height, and expected steel set support capacity; conducting stress and geological condition evaluation of the mine opening using a finite element computer modeling program based on the mine opening information; and designing structural supports for the mine opening utilizing the stress and geological condition evaluation of the mine opening. | 02-18-2010 |
| 20100054870 | MINE ROOF AND RIB SUPPORT WITH REINFORCED CHANNEL - A mine roof and rib support can be a support member having a roof support arm and a rib support arm, wherein the roof support arm is provided at an angle to the rib support arm. An aperture for a roof bolt is provided through the support member adjacent an intersection of the roof support arm and the rib support arm. A bearing plate having an upper edge and a lower edge, and a through-hole provided therebetween, can be provided wherein the upper and lower edges are positioned in abutment with the roof and rib support arms, respectively, to simultaneously apply force to each arm when a roof bolt is installed through each of the bearing plate and the support member. A flange can be provided at a distal end of one or both of the roof and rib support arms, each flange projecting toward the mine roof or rib. | 03-04-2010 |
| 20100310325 | Truss Shoe with Wedge Retaining Sleeve - A truss shoe for a roof support system includes a bolt receiving section, an intermediate section, and a cable engaging section. The cable receiving section has a passageway having a first open end spaced from, and in facing relationship, to the bolt receiving section and an opposite second end, wherein the passageway has a cone-shaped portion having a decreasing diameter as the distance from the first end of the passageway increases to receive a wedge shaped cable retention assembly. The surface of the intermediate section includes a cut out portion that extends from the first opening of the passageway toward the bolt receiving section and terminating at a riser. A locking tube has one end in the passageway in facing relationship to the retention assembly and the other end in engagement with the riser to prevent the retention assembly from moving out of the first opening of the passageway. | 12-09-2010 |
| 20110200400 | PLASTIC CABLE BOLT BUTTON - 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. | 08-18-2011 |
