摘要
通过理论分析提出了3种减小开采应力集中的方案,并运用MIDAS-GTS和FLAC3D软件对渣滓溪锑矿现行开采方式和改进方案进行了分析研究。结果表明:在现状无序开采方式下,应力集中明显,且应力集中点不易预测。改进方案分析指出先开采下盘矿脉时,对上盘矿脉形成应力叠加,出现应力集中;先开采上盘矿脉时,形成的采空区隔断了上覆岩层压力,可以很好地避免后采矿脉应力集中,因此对渣滓溪锑矿由于应力集中引起的岩爆的防治应选择先开采上盘矿脉。
Put forward three suggestions for reducing the mining stress concentration through theoretical analysis. Analyzed the status quo and improvement scheme of Zhazixi antimony mine by MIDAS-GTS and FLAC3D.The results showed that the stress concentration is obviously and not easy to predict under the status quo of disordered mining way.The stress concentration appeared for the first vein mining footwall and could be avoid better for vein mining on the plate first of improved scheme.So to prevent and control the rock burst by stress concentration of Zhazixi antimony mine should choose vein mining on the plate first.
出处
《黄金科学技术》
CSCD
2016年第3期9-13,共5页
Gold Science and Technology
基金
湖南省自然科学基金项目"红砂岩边坡嵌岩微型组合抗滑桩的弯剪变形特征研究"(编号:14JJ4003)资助
关键词
岩爆
矿山安全
应力集中
rock burst
mining safety
stress concentration
