中文摘要：

以玲珑金矿东风矿区的阶段矿房法试验矿房采切为工程实例,采用强度折减法和具有拉剪破坏分析功能的FLAC程序,对矿房的稳定性进行分析.通过不断折减岩体材料的力学强度参数,使围岩塑性区接续扩展,直至采场发生破坏,此时的折减系数即为安全系数.计算结果表明,采场被切割后结构复杂,单纯根据塑性区范围大小或等效塑性应变贯通作为采场整体失稳的临界判据是值得商榷的,而关键点位移和单元破坏规律发生突变具有较好的一致性,可用于作为确定采场整体失稳的判据.对试验矿房两个分段切割槽形成后的计算结果分别为2.14和1.94,可见矿房的稳定性较高,该采矿方法适合在矿区推广使用,得到的结果能够为类似工程实践提供参考.

英文摘要：

According to preparation and cut engineering of stage room mining method in Dongfeng mining area of Linglong gold mine,strength reduction finite element method was introduced into the underground stope stability analysis.The calculation results showed that the transfixion of equivalent plastic strain in wall rock is not suitable to define the complex underground stope.The deformation of wall rock shows a good agreement with the number or volume of failure elements tending to rise suddenly and sharply.The general safety of caverns is obtained when the result of simulated excavation showed that the underground stope failure.Using the underground caverns strength reduction technique,the general safety factor of cut slot in two stages was gained,which is 2.14 and 1.94.The calculation results showed that the safety factor is high enough to maintain the stability of underground stope.This method has guidance to popularize the stage room mining method in similar mining area.