关键词: 采矿方案优选, 数值模拟, 预支护

Abstract: In view of the geological conditions and mining needs of a gold mine in Minxian County， Gansu Province，a mining scheme is proposed to improve mining efficiency，reduce costs，ensure operation safety and reduce environmental impact. The geographical environment，ore body occurrence and mining technical conditions of the mine are comprehensively summarized，and the geological characteristics，hydro‐ geological and engineering geological conditions of the ore body are clarified. Through the systematic rock mechanics parameter test，it provides a scientific basis for the design of mining methods. Using FLAC3D nu‐ merical simulation，the numerical calculation model is established，the displacement law of stope and the evolution process of mining stress are analyzed，and the recommended mining scheme is determined. Two main mining schemes of surface unnatural collapse and surface natural collapse are proposed，comparison of structural parameters，mining and cutting engineering，drilling and blasting，ore filling，stope ventilation and pillar recovery are compared. Finally，according to the mechanical properties of rock，mining cost，safe‐ ty requirements and environmental impact and other factors，the most suitable mining method is recommend‐ ed，and the selection of support technology is proposed.

Key words: mining scheme optimization, numerical simulation, pre-supporting