三山岛金矿深埋蚀变硬岩真三轴压缩下的力学性质

以深部三种不同的蚀变岩为研究对象，利用真三轴加载系统和声发射监测系统，对岩样进行加载试验和声发射监测试验，对三种蚀变岩的变形、强度、破裂演化过程及微观破坏机制进行分析.试验结果表明:受动力变质作用和蚀变作用影响，三种蚀变岩的力学性质有较大差异.蚀变后产生方解石含量高的岩样脆性大，破坏过程最剧烈，弹性能释放最快;遭受严重动力变质作用和发生碳酸盐化蚀变都会降低蚀变岩的强度，且其抵抗和容纳变形的能力较弱，岩石容易破坏;蚀变产物中白云石含量高会导致蚀变岩主裂纹扩展方向发生偏转.

Mechanical Properties of Deep Buried Altered Hard Rock Under True Triaxial Compression in Sanshandao Gold Mine

The triaxial loading tests and the acoustic emission monitoring tests were carried out three types of altered rocks buried in the depth by using the true triaxial loading system and the acoustic emission monitoring system. The deformation， strength， crack evolution process and microscopic failure mechanism of the altered rocks were analyzed. The experimental results show that the mechanical properties of the three types of altered rocks are quite different due to the influence of the dynamic metamorphism and alteration. After alteration， rock sample with high calcite content becomes brittle， and the failure process is severe accompanied by fast release of elastic energy. The strength of the altered rock suffered from severe dynamic metamorphism and carbonate alteration can be reduced， so its ability to resist deformation is weakened and being vulnerable to be damaged.High content of dolomite in the alteration products can lead to the deflection of crack propagation.