IMPROVEMENTS IN METHODS FOR MINING IN BARREN ROCKS OR OREBODIES

摘要

We Claim:- 1. A method for mining in barren rocks or orebodies in which drilling and blasting is carried out in order to bring about substantially horizontal drifts or upwardly inclined drifts having an inclination less than the angle of repose of the loosened material, and vertical mining of underground cavities, respectively, characterized in that said mining is carried out with a drill unit, which is movably suspended on rail means fastended to the roof of said drifts or underground cavity and extending along said roof into a raise, the mining being carried out from said drill unit and comprising drilling and loading blast holes, the drill unit is removed from the mining area, blasting is carried out, the drill unit is again brought forwar to the working area and the drilling and loading steps are repeated at the same time as the loosened material is removed without hindrance during the drilling.