Simulation study on the mechanical stability of subsequent filling mining stope

摘要

The aim of the study is to investigate the influence of subsequent cemented filling on surrounding rock's mechanical stability. The mechanical parameters of surrounding rock and filling body were determined on conditions of in-situ investigation and indoor rock mechanics experiment. Based on the parameters, the stress distribution and displacement of filling stope's surrounding rock were simulated using FLAC3D according to a underground mining ore-body existing condition and mechanical property of surrounding rocks. This paper analyzed the stress-strain appearance and change rule of displacement field, the deformation mechanism of surrounding rock and filling body, and the stope's stress distribution rule and damage mechanism. This study will pay an active role in theoretical basis and scientific evidences to the optimization of mining method and structure parameters, reasonable mining engineering design, and safety production management.