基于Hoek-Brown破坏准则的岩体参数预测方法与应用

Method and Application of Rock Mass Parameter Prediction based on Hoek-Brown Criterion

一般来讲,岩体破坏过程的计算均采用Mohr-Coulomb准则,但此时的岩体力学计算参数的选取是关键,直接影响着理论计算和分析的准确性。Hoek-Brown破坏准则能够较全面地反映岩体受构造应力、人为开挖等因素的作用,因此,在该准则理论的基础上分别介绍了Mohr-Coulomb准则中的抗剪强度参数、抗压强度和变形模量的等效估算方法;然后针对某矿区的矿岩参数进行了预测,得到了一些有实用价值的结论,为该矿区的采矿设计、数值分析和岩体评价提供了基础数据资料。

Generally speaking, Mohr - Coulomb criterion is adopted in the calculation of the damage process of rock mass. The key step is to reasonably select rock mass parameters, which d/reet/y impact the accuracy Of theoretical calculation and analysis. Because Hoek - Brown criterion can reflect roundly the effect of which factors such as tectonic stress, man - made excavation and so on to rock mass, the estimation method of shear strength, compressive strength and deformation modulus of Mohr - Coulomb criterion are introduced based on Hoek-Brown criterion. In addition, the estimation method is applied to forecast ore rock parameters of a mine, some practical value results are got, and base data are provided for mining design, numerical analysis and surrounding rock evaluation.