System and method for mine roof counter bore and cable bolt head securement therein
View Patent ↗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.
1. A mine roof support comprising:
a plate having a semi-spherical raised portion, with a first side and a second side defining a second side profile and defining a cavity and a planar portion directly extending from the raised portion, the planar portion of the plate configured to engage a mine roof, the plate defining an opening within the raised portion; and
a mine roof cable bolt having a drive end, the mine roof cable bolt extending through the opening and comprising a barrel and wedge assembly, the barrel and wedge assembly at least partially received within the cavity, a top portion of the barrel and wedge assembly mating with the second side of the raised portion of the plate, the top portion of the barrel and wedge assembly having a profile with a curvature matching a curvature of the second side profile of the raised portion of the plate.
2. The mine roof support of claim 1 , wherein the cavity is sized to substantially receive the entire drive end therein.
3. The mine roof support of claim 1 , wherein one end of the barrel defines a socket dimensioned to receive a drive tool to impart rotational force thereon.
4. The mine roof support of claim 1 , wherein a nut is secured to the drive end of the mine roof cable bolt adjacent to a bottom portion of the barrel and wedge assembly.