摘要
基于蒙特卡罗法建立巨石混合体随机块体模型,进行了双轴压缩数值试验,对巨石混合体的力学性质及参数取值进行了研究。结果表明:巨石混合体具有高围压条件下的应变硬化和低围压条件下的应变软化特征,且具有剪胀性;低应力条件下巨石混合体的抗剪强度符合莫尔-库仑强度理论,抗剪强度参数与块体表面的摩擦系数有关,其内摩擦角比块石表面摩擦角大10°左右。
Numerical simulation test was carried out to study the mechanical characteristics of creating random block model based on Monte Carlo method. The results show that large large rock mixture by rock mixture has the characteristics of strain hardening in high stress and strain weakening in low stress, and show up obvious dilatation. Shear strength of large rock mixture obeys the Mohr-coulomb criterion under low stress and has a lot to do with superficial friction coefficient. The friction angle is usually 10° higher than superficial friction angle.
出处
《中国地质灾害与防治学报》
CSCD
2014年第1期108-114,共7页
The Chinese Journal of Geological Hazard and Control
基金
"十二五"国家科技支撑项目(2012BAK10B01)
关键词
巨石混合体
力学性质
数值模拟
large rock mixture
mechanical characteristic
numerical simulation
