化学-渗流耦合作用下花岗岩变形破坏试验研究

发布时间：2018-06-10 21:15

  本文选题：花岗岩 + 水化学侵蚀　； 参考：《矿业研究与开发》2016年07期

【摘要】：以三山岛金矿深部赋存的花岗岩为研究对象,通过不同pH值的酸性NaCl溶液与蒸馏水作用后花岗岩的单轴压缩试验,探讨了水化学侵蚀效应对花岗岩的变形和破坏特性的影响。试验结果表明:水化学溶液侵蚀后,花岗岩试样峰值强度降低,变形有脆性向延性转变的趋势;由于水化学溶液对岩石的软化影响,花岗岩试样的弹性模量降低,泊松比相应有所增加;在酸性溶液与花岗岩的物理化学作用中,溶液pH值越小、流速越大,花岗岩各项力学参数指标的劣化越大。
[Abstract]:Based on the uniaxial compression test of granite with different pH values of acidic NaCl solution and distilled water, the effects of hydrochemical erosion on the deformation and failure characteristics of granite were studied. The experimental results show that the peak strength of granite samples decreases and the deformation tends to be brittle to ductility after erosion by hydrochemical solution, and the elastic modulus of granite samples decreases due to the effect of hydrochemical solution on the softening of rock. The Poisson's ratio increases correspondingly, and in the physicochemical interaction between acid solution and granite, the smaller the pH value of the solution, the greater the velocity of flow, and the greater the deterioration of the mechanical parameters of the granite.
【作者单位】： 北京科技大学土木与环境工程学院;北京科技大学金属矿山高效开采与安全教育部重点实验室;青岛市勘察测绘研究院;
【基金】：中央高校基本科研业务费专项资金资助项目(FRF-TP-15-037A2) 国家自然科学基金项目(51574014)
【分类号】：TD313.1
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本文编号：2004697