爆破荷载作用下岩石边坡动态响应的FLAC3D模拟研究

已有的岩石边坡爆破动力响应分析多用有限单元法.作者尝试运用FLAC3D的动力分析模块进行岩石边坡爆破动力响应分析.建立了能够反映主要地质构造的三维岩石边坡数值模型.介绍了三维有限差分程序FLAC3D动力分析的理论基础,包括边界条件的设定、动力荷载的输入、阻尼的选取以及岩体本构模型的选择.采用FLAC3D模拟了该岩石边坡在爆破荷载作用下的动态响应.分析了爆破结束后边坡体内位移场、应力场、速度场以及塑性区的分布情况,并与爆破前进行对比.将计算结果与实测数据进行了比较,结果表明FLAC3D用于爆破荷载作用下岩石边坡动态响应的数值模拟是可行的.

FLAC3D Simulation for Dynamic Response of Rock Slope under Explosion

The dynamic response of blasting for rock slope is simulated by dynamically analyzing the module of FLAC^3D program. A 3-D rock slope model that can reflect its main geological structure is established. The theoretical basis of dynamic analysis by the FLAC3D program is introduced, including setting boundary conditions, inputting dynamic loadings, choosing damping and the physical model of the rock slope. The FLAC^3D program is utilized to simulate the dynamic response of the rock slope under explosion. The distributions of stress field, displacement field, velocity field and plastic zones in the rock slope are analyzed after blasting. The simulation results are compared with the site monitoring results. Results shows that the FLAC^3D program can he used to simulate the dynamic response of rock slope under explosion effectively.