化学侵蚀作用下花岗岩力学特性研究

Study on mechanical properties of granite under chemical erosion

为了研究化学侵蚀条件下花岗岩力学损伤特性,文章针对不同酸碱溶液侵蚀时间下集安地区花岗岩,开展了一系列单轴压缩试验。评价了化学侵蚀对花岗岩物理力学损伤机制与开裂失效的影响,并量化分析了化学侵蚀时间对力学参数的影响关系。研究发现:花岗岩抗压强度、弹性模量与侵蚀时间成反比;侵蚀时间与单轴抗压强度、弹性模量、孔隙率、波速之间的相关系数分别为-0.96、-0.98、0.91、-0.95;经过酸碱侵蚀后的花岗岩裂缝数量有所增加且无贯穿裂缝出现。

To study the mechanical damage characteristics of granite under chemical erosion conditions,a series of uniaxial compression tests were carried out in this study for granite in Ji’an area under different erosion times of acid and alkaline solutions.The effect of chemical erosion on the physical and mechanical damage mechanisms and cracking failure of granite was evaluated,while the relationship between the effect of chemical erosion time on mechanical parameters was quantitatively analyzed.The study found that granite compressive strength and elastic modulus are inversely proportional to erosion time.The correlation coefficients between erosion time and uniaxial compressive strength,elastic modulus,porosity,and wave velocity were-0.96,-0.98,0.91,and-0.95,respectively.The number of cracks in granite after acid and alkali attack increased and no penetrating cracks appeared.