This paper

according to characters of breaking rock of excavators

deals with the influrnces of physic-mechanical properties and occurrences of rock on the excavatability of rock under the condition of muti-cut breaking performed on a large-scale section. According to analyses of in-situ data

a preliminary plan for excavatable classification under the use of excavators is put forward in terms of geological survey

which depends upon hardness and intactness and grindability of rock.