A Safe Way to Reduce Roof Support Costs and Improve Safety and Productivity

摘要

The fundamentals concepts of roof support are similar between coal mining, metal mining and tunnelling and yet there arerndifferent design approaches, different hardware, and different levels of site investigation. This should not be the case andrnthis paper discusses the key geotechnical issues that should underlie all roof support design -the need to reinforce defects.rnA design method to build a beam in laminated rock under high horizontal stresses is presented. The method allows forrnchanging rock strengths, defect properties and varying horizontal stresses. At one level the design can be implementedrnwith design charts and tables. Lessons learnt during the implementation of the designs at 5 different mine sites arerndiscussed.