Method of bonding roofbolt rods to boltholes

Details Method of bonding roofbolt rods to boltholes Method of bonding roofbolt rods to boltholes

1983-01-10

1985-02-05

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405260, E21D 2002, E21D 2100

Patent

active

044975953

ABSTRACT:
A procedure of bonding roofbolt rods to boltholes whereby the roofbolt rod is pushed under rotating movements into a bolthole filled with an adhesive mass consisting of a mix by whose reaction is obtained polyurethane, characterized in that a mass consisting of polyisocyanate-prepolymerides is used which has been prepared from polyisocynates and one or more bifunctional polyols in a molecular weight range between 800 and 5,000, preferably between 1,200 and 3,000, and which reacts in the borehole with 1 to 25% by weight (related to the mass) of water and/or polyols serving as the hydroxyl component.

REFERENCES:
patent: 2867278 (1959-01-01), Mallory et al.
patent: 2889883 (1959-06-01), Santora
patent: 3925996 (1975-12-01), Wiggill
patent: 4353463 (1982-10-01), Seemann
patent: 4386877 (1983-06-01), McDowell

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