Rockburst is a kind of surrounding rock failure mode in deep underground engineering

and the occurrence conditions of rockburst are restricted. According to the statistical result of rockburst in Jinping II deep-buried tunnel

even if stress conditon and rockmass strength achieve a certain requirements

the intensity of rock burst is still closely related with rockmass mechanical characteristics. Marble is given priority to Jinping deep buried tunnel

so research works about the marble mechanical characteristic in relation to rockburst are carried out. According to the marble triaxial compression test result

the brittle-ductile-plastic transition characteristic of marbe is verified

and the transition confining pressure and the related Hoek-Brown strength parameters of Baishan group are determined. Adopting the experience method

the rock is evaluated burst risk preliminarily. In order to further study the influence of rockmass mechanics characteristics on rockburst risk

based on the actual rockburst failure pattern

the stress paths of different depths measuring point are investigated

and the mechanical parameters of rock mass are checked. The mechanical state of surrounding rock in rockburst risk is analyzed

and study the influences of rock strength

integrity and brittle characteristics on the occurrence conditions of rockburst are studied. The results show that the rock strength and brittle characteristics can affect the degree of rockburst

but its influence is relatively small

while the integrity of rock mass has the obvious effect on rockburst formation.