Since the concept of representative elementary volume (REV) of fractured rock masses is fundamental and significant in rock mechanics

it is worth studying by researchers. This paper critically reviews the latest research achievements in the field of REV of fractured rock masses. Three main aspects are discussed

which are research viewpoints and its relevant parameters

research approaches and quantitative methods. Firstly

from the point view of studying REV

the geometrical parameters of discontinuities and rock blocks

the mechanical and hydraulic parameters of rock masses are investigated in detail. Secondly

the applied conditions

merits and drawbacks of research approaches are briefly introduced

including statistical

analytical and numerical methods. Finally

the quantitative methods for determination of REV

i.e.

intuitive judgment

error and coefficient of variation prediction

hypothesis tests

curve fitting and grey correlation analysis

are summarized. This paper provides reference and guidance for relevant studies.