Abstract:Aiming at the actual conditions of No.2-1# and No.2-2# ore bodies in a certain mine, based on the backfill mining method currently used in the mine, three stope structure parameter schemes were studied. The research was carried out by combining Midas modeling with FLAC numerical simulation to analyze the vertical displacement and principal stress distribution characteristics of each scheme, and a technical and economic comparison was conducted. The results show that Scheme 3 with large stope and small pillar (stope 50m, barrier pillar 10m, low-strength backfill) has obvious advantages over other schemes in controlling surrounding rock deformation, reducing backfill costs (5332 million yuan per standard ore block), and improving mining efficiency. Its maximum displacement value, maximum principal stress value, and minimum principal stress value all meet the stability requirements for safe mining. The research results provide technical parameter references for the safe production of the mine.
