A review of test technique and theory of modeⅠ rock fracture toughness

Abstract：Rock fracture toughness is a parameter which can denote the resistance capacity of crack initiation and expansion, and there are more difficulties in its test than usual strength test.In this paper, the current and progress of test method in modeⅠof static fracture toughness was introduced, and some advices were given.Disc specimen has lots of advantages, such as smaller volume, easily loaded, and carried out mixed mode ⅠandⅡ fracture experiments, etc.It is a meaningful and very urgent work to develop and improve the test technology of rock fracture toughness with disc specimens.

Keyword：rock;fracture toughness;disc sample;test method;