Patent ID: 6447228
Filing Date: 2002-09-10
Classification: B21K,E21D

Abstract:
A method of forming and installing a rock bolt, said method comprising the steps of:a. plastically deforming a shank portion of the bolt by application of an eccentric shear force to form at least one paddle section, said paddle section protruding beyond the undeformed exterior of said shank portion prior to deformation; b. inserting the plastically deformed bolt into a hole drilled in a rock body and having a diameter sufficient to receive the plastically deformed bolt with a clearance fit, said hole having previously had inserted therein a resin mixture; c. rotating said bolt about its longitudinal axis to move said at least one paddle section through said resin mixture to mix the constituents thereof together; and d. allowing said resin mixture to harden in said hole and around said at least one paddle section.