SCALE EFFECT OF JOINTED ROCKS IN FAILURE
The problem of scale effect of jointed rock masses is an important issue in civil and mining engineering. The scale/size effect of the rock mass specimens containing ideally distributed joints subjected to uniaxial compression is studied numerically by using a numerical code. Unlike other numerical models, complete failure process can be obtained, and also the heterogeneous nature of material in mesoscopic scale can be taken into consideration. By varying the dip angle of the joints, the numerical rock mass specimens show a strong anisotropic feature. Numerical results confirm that scale effect or size effect for jointed rock masses maybe originates from the joint distribution, the strength of joints and rocks. The strength of the jointed rock masses decreases with the increasing of the scale/size, which can be predicted by a negative exponential formula. The failure mode of the jointed rock masses can be classified into tensile fracture perpendicular to the joints or shear fracture parallel to the joints. The results will give help to understand the mechanical behaviour of jointed rock masses.
ZHENG-ZHAO LIANG LIAN-CHONG LI CHUN-AN TANG HAO-YU CHEN
School of Civil and Hydraulic Engineering, Dalian University of Technology Dalian, Peoples Republic of China, 116024
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
1483-1488
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）