Hoek-Brown强度准则在FLAC3D数值模拟中的应用

为了弥补Mohr-Coulomb准则不能动态地反映岩体破坏时的力学性质的不足，克服其在工程模拟中的局限性，本文通过对比分析Mohr—Coulomb准则和Hoek—Brown准则，将Mohr-Coulomb中的内聚力和内摩擦角用Hoek—Brown中的内聚力和内摩擦角来代替，将Hoek-Brown强度准则应用于FLAC如中，进行开采沉陷数值模拟．结合大柳塔1203综采工作面开采后的岩移观测资料，分别用Mohr-Coulomb准则和Hoek—Brown准则进行数值模拟，对比结果表明，HoedBrown准则更能反映实际的地表移动特征，这为FLAC^3D更好地在工程中应用提供了很好的参考．

Application of Hoek-Brown Strength Criterion in Numerical Simulation of FLAC3D

In order to make up the deficiency that the Mohr-Coulomb strength criterion can not dynamically reflect rock mechanical behaviors during the failure process and that it has some limitations in engineering simulation, the difference between Mohr-Coulomb strength criterion and Hoek-Brown strength criterion was analyzed and the relationship between them found. The mining subsidence was numerically simulated by replacing the cohesion and the internal friction angle in Mohr-Coulomb strength criterion with the Hoek-Brown strength criterion and by applying Hoek-Brown strength criterion in the FLAC^3D. The observed rock movement data coming from 1203 working face in Daliuta Coal Mine were simulated by both the Hoek-Brown strength criterion and the Mohr-Coulomb strength criterion, showing that the former is much better than the later in reflecting actual ground movement. This has provided a reference for applying the FLAC^3D in projects.