摘要
针对某大型露天—地下联合开采铜矿山的开采现状,将协同理论引入地下采场的稳定性分析,主要考虑了地下采场中矿房、矿柱以及充填体假柱在结构尺寸上的协同作用,对原有采场结构参数进行了改进。为保证改进后地下采场在巷道掘进及矿房回采过程中的稳定,对3个充填方案下掘进巷道和回采采场的稳定性进行了数值模拟。结果表明:对于不同的充填方案,在待开挖矿体中掘进较大尺寸的巷道,其巷道基本稳定;回采过程中,其采场的稳定性与充填体刚度相关,充填体的刚度高低结合,采场应变、位移较理想。底部块石胶结、上部尾砂胶结充填是地下采场的首选方案;采用的大采矿横巷9 m扩底采场结构方案,回采过程中,采场顶板的稳定性提高了,同时出矿巷道的变形较小、保持稳定,该改进采场结构参数具有明显的优势。
In view of the exploitation status of a large scale open-underground combined mining of copper mine,the synergistic theory was introduced into stability analysis of the underground stope,and the synergistic effect on the structure size of stope,pillar and backfill fake pillar are mainly considered. The original stope structures are optimized. In order to ensure the optimized mine stope stability in roadway excavation and stope mining process,the stability of drifting tunnel and mining stope was numerically simulated under three filling schemes. The results showed that： in different filling program,and for the ore-body remaining to be exploited,large roadway basically keeps stable. In stoping process,the stability of stope is associated with the stiffness of the backfill materials. The stope strain and displacement are ideal while combining the high and low stiffness of backfill. The cemented lumpy-rock at the bottom and the tailings cement at the upside are the preferred alternative. Foe the 9m belled stope structure scheme,and in the stoping process,the stability of stope roof is increased,meanwhile,the ore removal roadway is less deformed and keeps stable. The optimized stope structure parameters have obvious advantages.
出处
《金属矿山》
CAS
北大核心
2015年第7期16-20,共5页
Metal Mine
基金
"十一五"国家科技支撑计划项目(编号:2006BAB02A17)
关键词
结构协同
采场结构
稳定性
参数优化
数值分析
Structural synergy
Stope structure
Stability
Parameter optimization
Numerical analysis
