ABSTRACT
The paper briefly describes the principal types of anchorage available and outlines their advantages and limitations based on field observations. The research approach includes roofbolt anchorage tests carried out in a metalliferous mine and installation efficiency tests performed in the laboratory. The anchorage tests include both failure tests as well as load-displacement tests performed on mechanical and resin rockbolts, cement or resin grouted dowels, Split Sets and Swellex dowels. Two series of laboratory tests were performed to investigate the properties and attributes of bearing plates and to illustrate the underlying principles of resin cartridge use. The results of these tested systems are given together with their critical appraisal. Practical application of this approach for the selection of a roofbolt system in a particular locale is illustrated.
