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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。
Taking the granite in the deep of the Sanshandao gold deposit as the research object, the uniaxial compressive tests of granite with different pH values of acid NaCl solution and distilled water were carried out to investigate the effect of chemical attack on the deformation and failure characteristics of granite. The experimental results show that the peak strength of granite samples decreases with the erosion of water chemical solution, and the deformation tends to change from brittleness to ductility. The elastic modulus of granite samples decreases due to the softening effect of water chemical solution on rocks, and the Poisson’s ratio In the acidic solution and granite physiochemical reaction, the smaller the pH value of the solution, the greater the flow rate, the greater the deterioration of the mechanical parameters of the granite.