Abstract: A mine bolt formed of continuous fiber reinforced pultruded rod-like reinforcing element is disclosed. This rod-like element includes at least one helical groove and/or protrusion along its length, with the continuous reinforcing fibers in the protrusions or surrounding grooves generally conforming to the helical pattern of the outer surface of the rod. The bolts formed by the instant invention also have utility in reinforcing such structures as mine roofs or concrete. The bolt of the instant invention comprises the above helically grooved rod fitted with an end cap that fits the helical turns of the grooved rod. The end cap may also serve as the mine roof plate.

Abstract: A mine bolt formed of continuous fiber reinforced pultruded rod-like reinforcing element is disclosed. This rod-like element includes at least one helical groove and/or protrusion along its length, with the continuous reinforcing fibers in the protrusions or surrounding grooves generally conforming to the helical pattern of the outer surface of the rod. The bolts formed by the instant invention also have utility in reinforcing such structures as mine roofs or concrete. The bolt of the instant invention comprises the above helically grooved rod fitted with an end cap that fits the helical turns of the grooved rod. The end cap may also serve as the mine roof plate.

Abstract: A continuous fiber reinforced pultruded rod-like reinforcing element is disclosed. This rod-like element includes at least one groove and/or protrusion along its length, with the continuous reinforcing fibers in the protrusions or surrounding the grooves generally conforming to the pattern of the outer surface of the rod. Preferably, the protrusions and/or grooves form a generally helical pattern on the surface of the rod. The rods formed by the instant invention have utility in reinforcing such structures as concrete, mine roofs, plastics and the like. Also disclosed are methods and apparatus for producing these stock materials.