深部开采尾砂胶结充填体变形的混沌研究  

Research on chaos of deformation of cemented tailings backfill in deep mining

作　　者：刘志祥[1] 李夕兵[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《矿山压力与顶板管理》2005年第3期94-97,共4页Ground Pressure and Strata Control

基　　金：国家自然科学基金重大项目(50490274);国家973项目(2002CB412703)

摘　　要：试验得出了不同配比尾砂胶结充填体最大屈服应变,对深部开采高阶段充填体变形进行了监测,用混沌理论研究了充填体稳定性。通过对监测数据重构相空间,提示了不同配比充填体变形的内在规律。根据监测数据,计算了不同配比尾砂胶结充填体变形的混沌吸引子和最大Lyapunov指数,并用最大Lyapunov指数预测了充填体变形,确定了安庆铜矿深部开采高阶段矿柱合理回采周期。研究结果表明:充填体变形具有混沌特性,混沌理论能较好地反映尾砂胶结充填体的变形与破坏特征;充填体配比越低,变形的分形维数越高,最大Lyapunov指数越大。The maximum yield strains of backfill specimen with different cement-tailing ratios being tested, and the deformations of high backfill in deep mining being monitored, the stability of high backfill was researched on chaotic theory. Reconstructing phase space to measured data, the intrinsic laws of deformation of different backfill were researched. According to monitored data, the chaotic attractors of deformation of backfill with different cement-tailing ratios and their maximum Lyapunov exponents were calculated, and their deformations were predicted with maximum Lyapunov exponents, as well as a reasonable period in high-level deep mining in Anqing copper mine was analyzed. Research results show that the deformations of backfill hold the character of chaos, and chaotic theory is propitious to research their characters of deformation and breakage, e. g. the lower the cement-tailings ratio, the higher the fractal dimensions and maximum Lyapunov exponents of deformation will be.

关 键 词：深部开采 尾砂胶结充填体 混沌 

分 类 号：TD853.34[矿业工程—金属矿开采]