一、国内外围岩分类概况 (一)概述 自十八世纪出现最初的围岩分类——岩石开挖分类——以来,分类历史已有一、二百年。二十世纪五十年代以后,分类发展较快,至今约有百余种。国内分类,以铁道部门最早(1960);七十年代我国自己的围岩分类在铁路、建筑、水电、地质、冶金、煤炭和工程兵等部门相继出现,约有三十余种(参阅文献[1]～[4])。 (二)国外围岩分类简介 普氏f值分类,在苏联和我国普遍采用较久;在法国(AFTES,1976)至今 I. Introduction to the Classification of Surrounding Rocks at Home and Abroad (I) General The history of classification has been one or two hundred years since the original classification of rock surrounding the rock excavation category in the 18th century. After the 1950s, classification developed rapidly, so far about a hundred species. Domestic classification, the earliest railway sector (1960); seventies own classification of wall rock in the railway, construction, hydropower, geology, metallurgy, coal and engineering and other departments have emerged, there are about more than 30 species (see [1 ] ~ [4]). (B) Introduction to the classification of foreign rock The Platts f-value classification, generally used in the Soviet Union and China for a long time; in France (AFTES, 1976) so far