Numerical modelling for the recovery of protecting pillars in Soma district

The need for more production has become necessary in recent years as a result of increase in lignite demand in TURKEY. Therefore, it is important to increase productivity in longwall mining method to provide as much utilization as possible from this source. Safety pillars, which have been left for the stability of main drift and shaft, should therefore be recovered after the operational life of the mine. In this research work entitled "Numerical Modelling for the Recovery of Protecting Pillars in Soma District", an underground mine based in Soma-Manisa, belonging to Hüstaş A. Ş. of Turkey was studied. Stability of main drift and shaft safety pillars due to stresses and deformations occurring during the production have been investigated by means of a numerical analysis method, namely LAMODEL, operating by boundary element technique. Stability of shaft due to stresses and deformations has similarly been investigated by using one of the numerical analyses methods known as finite element technique which operates with ANSYS computer software.