裂隙岩体结构面直剪特性与参数反演试验

发布时间：2019-07-13 17:42

【摘要】：为准确获取裂隙岩体工程中结构面的力学参数,以细观岩石力学理论和岩石结构面的数字精细化测量为基础,运用PFC~(2D)颗粒流软件,建立铜坑矿锌铜矿体裂隙结构面的精细数值仿真模型,开展节理岩石直剪数值模拟试验。实现岩体结构面的剪切力学参数的反演与预测,获得铜坑矿裂隙节理结构面的抗剪力学参数。研究结果表明:由于结构面平滑,在裂隙结构面的直剪数值模拟试验过程中,主要形成剪切滑移破坏;铜坑矿裂隙结构面的黏聚力为0.45 MPa,内摩擦角为35.8°,其反演的数值计算结果与本地区高峰矿的无厚度节理面试验数据相似度高,试验结果可为岩体结构面参数的工程应用提供基础参数。
[Abstract]:In order to obtain the mechanical parameters of structural plane in fracture rock mass engineering accurately, based on the theory of meso-rock mechanics and the digital fine measurement of rock structure surface, the fine numerical simulation model of fracture structure plane of zinc-copper orebody in Tongkeng Mine is established by using PFC~ (2D) particle flow software, and the numerical simulation experiment of joint rock direct shear is carried out. The inversion and prediction of shear mechanical parameters of rock mass structural plane are realized, and the shear mechanical parameters of fracture joint structural plane of Tongkeng Mine are obtained. The results show that the shear slip failure is mainly formed in the process of direct shear numerical simulation test of fracture structure plane because of the smoothness of the structural plane, and the cohesion force of the fracture structure surface of Tongkeng Mine is 0.45 MPa, internal friction angle is 35.8 掳, and the numerical calculation results of the inversion are similar to the test data of the non-thickness joint surface of the peak mine in this area, which can provide the basic parameters for the engineering application of the structural plane parameters of the rock mass.
【作者单位】：湖南省永吉高速公路建设开发有限公司;湖南省交通规划勘察设计院;中南大学资源与安全工程学院;
【基金】：国家自然科学基金资助项目(51478479,51678570) 湖南省自然科学基金资助项目(14JJ4003) 湖南省交通科技资助项目(201524)
【分类号】：TD315

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