Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1994-01-24
1995-10-31
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
4052591, 405288, E21D 2100, E21D 2002
Patent
active
054623910
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.
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Castle Brian R.
Scott James J.
Scott Investment Partners
Taylor Dennis L.
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