A study of highwall mining panel stability

摘要: Abstract This study describes numerical work carried out to investigate the stability of a highwall mining panel using local mine stiffness (LMS) theory. theory estimates whether any small change in equilibrium state stress field region provokes sudden release energy or induces large geometry system. focuses solely on instability that may arise due pillar crushing. Panel slip along pre-existing faults has not been considered. The major conclusion is use LMS concept, leading calculation factor (PFS), used conjunction with safety (FoS), can provide added confidence layout design. A wide range sensitivity analyses was conducted gauge most significant factors (such as width-to-height ratio, mass coal strength, host rock stiffness, and rock/coal interface properties, configuration, etc.) would affect stability. finding FoS value about 1.2 critical level below which PFS starts decrease rapidly, so threatened. statement true over considered this paper. However, results be directly applied outside these ranges geomechanical parameters geometries for different analysis techniques. If input lie study, both need calculated specific trend versus further established. Previous back-analyses undertaken number pits have found design less than did ensure even short-term (less year). One such example included study.