as: Raise bore, a circular shaft mined bottom up using mechanical rollers to achieve shaft profile. This method works well in larger stopes however requires both access to top and bottom of stoping block. Raise bores work most effectively between 45 and 90 deg. Longhole raise, a pattern of tightly spaced blastholes and reamers (empty holes with no charge), similar to a burn cut in a development round. Can be done as downhole and fired in multiple lifts (15m rise in 3 lifts of 5 m to minimise chance of blast failing) or as uphole in one single firing. This method works well for shorter raises between 45 and 90 deg, however it is prone to freezing and may require remedial drilling to extract slot to full height. Airleg raise, using an airleg (jackleg) machine to develop a sub vertical raise into the stoping block. This method has the advantage of giving geological and geotechnical teams further analysis of the stoping block prior to mining. Boxhole boring, similar to raise boring but less productive as broken material is extracted from the same location as the drill, is used to bore vertically with no top level access required. (Hamza, 2016) References Underground mining