Numerical Simulation of Underground Mining-Induced Fault-Influenced Rock Movement and Its Application

The F317 fault, as a major tectonic zone in the Jianshan mine area, influences geotectonic features and geomechanical properties of area. Mining operations need to be conducted within these systems, so it is important fully study understand characteristics evolution systems develop reasonable mining plans safety measures. Aiming at problem that existence fault affects stability west road during security pillar underground Panzhihua Iron Mine, mechanical model surface was established through theory material mechanics. criterion slip retrieval process obtained combined with contact numerical analysis software FLAC3D. Two calculation models without were analyze change maximum tensile stress displacement protection under different simulation scenarios. influence fault’s presence on road’s obtained. results show changes positive shear stresses face caused by are main factors influencing slip. upper side tends along process, which theoretically prevents transfer subsidence roadside (foot fault). has less effect zone. Still, allows concentrated top bottom quarry isolated pillar, more likely cause rock stretched squeezed. Without 30.59 mm, X-directional 42.17 mm (both greater than safe limit 20 mm), Y-directional 19.75 mm. Compared case smaller, 16.92 19.63 3.35 all limits. Therefore, provides some from collapse due mining.