扰动频率对充填体力学响应的影响  

Effects of Perturbation Frequency on Mechanical Response of Backfill

作　　者：罗黎明[1] 邓畯仁 李爽[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083

出　　处：《世界科技研究与发展》2016年第5期942-945,1023,共5页World Sci-Tech R&D

基　　金："十二五"国家科技支撑计划(2012BAB14B01);国家自然科学基金(51274253)资助

摘　　要：稳定的充填体是二步骤矿房开采安全控制的关键。为研究不同动力扰动频率作用下充填体的力学响应,以云南某矿为例,采用FLAC3D软件建立充填体动力稳定性分析的三维数值模型,并对扰动幅值一定时,不同扰动频率下充填体的动力稳定性进行数值模拟计算;从位移场和应力场分析了充填体的破坏方式与破坏区域发展过程,得到不同扰动频率作用下充填体的动力响应规律。研究结果表明:充填体的力学响应与动力扰动频率密切相关,扰动频率的改变对充填体暴露面主应力与位移场的分布及充填体的破坏形式有重大影响。The stability backfill is the key of the second step stopping. In order to obtain the dynamic response regularity of backfill under different disturbance perturbation frequency,with a case study of a mine in Yunnan,a three-dimensional numerical model of the backfill stability analysis is established by FLAC3 D software. When the disturbance amplitude is constant,a series of numerical simulation tests on mechanical responses of backfill under different disturbance perturbation frequency have been conducted. The analysis of destruction way and area of backfill are carried out by displacement field and stress field. The mechanical response of backfill under different perturbation frequency is obtained. Research results illustrate that： mechanics response of the backfill is closely related to the dynamic disturbance frequency,the change of disturbance perturbation frequency has a significant impact on principal stress and the displacement field of backfill exposed surfaces and destruction forms of backfill.

关 键 词：地下采矿 充填体 扰动频率 动力响应 数值模拟 

分 类 号：TD853.34[矿业工程—金属矿开采]