The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 1995
Filed:
Jan. 24, 1994
Brian R Castle, Rolla, MO (US);
James J Scott, Rolla, MO (US);
Scott Investment Partners, Rolla, MO (US);
Abstract
A cable bolt mine roof crib for support and stabilization of roof rocks employing a series of cable bolts and/or cable members through a cribbing frame for actively supporting the roof and area surrounding an underground opening. The support imposes a restraint on geologic movement of the roof by the placement of rock anchors on the ends of cables at depth through the rock mass. The anchor portions of the cable bolts are placed beyond the zone of failure that would normally take place around an underground opening. The roof crib provides a bearing area for the roof rock which limits deformation and offers support by suspension to maintain interlock of rock fragments of the roof of the underground opening. The strength and length of cable bolts can be adjusted to fit initial tectonic load conditions and subsequent loads placed upon the opening by adjacent mining. The roof rocks above the crib may be prestressed by tensioning of the individual cable members, by the placement of pump packs or timber lagging between the crib frame and the roof rocks which may be pressurized to preload the entire structure.