中文摘要：

岩爆作为深埋地下工程围岩的-种破坏方式，其发生条件受多种因素的制约。根据在锦屏二级深埋隧洞掘进过程中的岩爆统计结果，即使应力条件和岩体强度达到-定的要求，岩爆发生与否以及剧烈程度还与岩体力学特性有密切的联系。锦屏二级深埋隧洞沿线以大理岩为主，为此开展了大理岩力学特性与岩爆发生关系的相关研究工作。根据大理岩三轴压缩试验结果，验证了大理岩的脆-延-塑转化特性，确定了锦屏白山组大理岩的转化围压和相关的Hoek-Brown强度参数，并利用经验的方法初步评价了锦屏深埋大理岩的岩爆风险。为了进一步明确岩体力学特性对岩爆风险的影响，利用现场实际的岩爆破坏形态，通过考察不同深度处测点的应力路径，校核了现场岩体的力学参数。在此基础上分析了具有岩爆风险的围岩力学状态，分别研究了岩石强度、岩体完整性和岩体脆性特征对岩爆发生条件的影响。研究结果表明，锦屏大理岩岩石强度和脆性特征可以影响到锦屏深埋隧洞围岩岩爆风险程度，但其影响相对较小，而岩体完整性对岩爆风险形成具有比较明显的影响。

英文摘要：

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 Hock-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 ofrockburst 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.