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为提高深部岩体力学参数估算的准确性。对从某矿现场取得的岩样进行岩石力学性质试验,获得包括岩石的抗压强度、弹性模量、黏聚力和内摩擦角等岩石力学参数。然后,对同一位置、不同方向的多个钻孔进行钻孔成像勘探,延伸其中的结构面,联通获得其三维空间分布特征,确定岩体结构等级和结构面表面特征等级。进而,基于地质强度指标(GSI)系统和Hoek-Brown准则,建立深部岩体力学参数量化取值的新方法。研究表明,用量化GSI方法估算得出的岩体力学参数小于室内岩石力学性质试验得出的结果。
To improve the accuracy of the mechanical parameters of deep rock mass estimation. Rock mechanics properties of rock samples obtained from a mine site were tested to obtain rock mechanics parameters including rock compressive strength, elastic modulus, cohesion and internal friction angle. Then, borehole imaging exploration is conducted for a plurality of boreholes in the same location and in different directions, and the three-dimensional spatial distribution characteristics of the two boreholes are extended to obtain the structural level of the rock mass and the surface feature level of the structural plane. Furthermore, based on the Geo-Intensity Index (GSI) system and Hoek-Brown criterion, a new method for quantifying the mechanical parameters of deep rock mass is established. The research shows that the mechanical parameters of rock mass estimated by the quantitative GSI method are less than the experimental results of indoor rock mechanics.