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各种用途的岩石分类和岩体分类,目的在于研究它们的工程质量的好坏。其判断标准在长时期以来,不论是在国内还是国外,都是采用易于测定又能全面反映岩石力学特征的单轴抗压强度这一指标参数。一般说来,人们根据自然界中各类岩石的特点,从工程实际出发,通常将它们区分为软岩和硬岩两个大类。在实际工作中,为便于使用又将它们进一步细分为极软岩、软岩、中硬岩、硬岩、极硬岩等五个等级。目前,在国外也还有划分为七个等级的,即除上述五级外,再加非常软和非常硬的二级。但实际应用还
The purpose of rock classification and rock mass classification for various purposes is to study the quality of their work. Its criterion has been used for a long time, both at home and abroad, using the uniaxial compressive strength parameter which is easy to measure and can fully reflect the mechanical characteristics of rock. In general, people according to the characteristics of various types of rocks in nature, starting from the actual project, they are usually divided into two categories of soft rock and hard rock. In practical work, they are further subdivided into five grades: soft rock, soft rock, medium hard rock, hard rock and hard rock for ease of use. At present, there are also seven levels in foreign countries, that is, in addition to the above five levels, plus very soft and very hard level two. But the practical application also