Abstract: The various disclosed embodiments provide a split set type composite rockbolt which has a slot extending from a chamfered tip of a tubular body portion of the rockbolt and through a neck portion partway to a collar portion. The rockbolt is made of a composite material which has a resin medium with longitudinal and circumferential fibres.

Abstract: The various disclosed embodiments provide a split set type composite rockbolt which has a slot extending from a chamfered tip of a tubular body portion of the rockbolt and through a neck portion partway to a collar portion. The rockbolt is made of a composite material which has a resin medium with longitudinal and circumferential fibres.

Abstract: A yielding mine roof support is provided which is made in the form of a hollow tube made from an epoxy, phenolic, or polyester fiberglass composite.

Abstract: The invention provides a composite load bearing member, such as a pole, which can be built for any specific design load with the objective of low cost to replace wood support applications for similar loads, typically up to 10 ton yield support load. The member has at least two layers but may also comprise of three layers for applications where UV protection and flame retardancy is paramount. The inside layer consists of a thermoplastic pipe of low cost, preferably HOPE, PET or PVC. The thermoplastic may or may not contain a flame retardant. The next layer consists of a thin fibreglass pipe as shell for the thermoplastic to enable strength. This fibreglass pipe will be tight fitting on the thermoplastic since the thermoplastic can be used as mandrel for the fibreglass pipe which can be manufactured by pultrusion or pullwinding or fibreglass fabric rolling. The fibreglass resin can be phenolic, epoxy, polyester or vinylester.

Abstract: A yielding mine roof support is provided which is made in the form of a hollow tube made from an epoxy, phenolic, or polyester fibreglass composite.