Particle mechanics modeling of brittle behavior of rock specimens with an infilled flaw
Natural fractures often contain infilling materials, such as sheared-off or broken rock fragments and clay, and rock fractures can also be manually infilled by grout. Although a large number of studies focused on the strength and failure behavior of rock samples with open flaws, the progress of research on the mechanical properties and failure modes of rock specimens with infilled flaws has been slow. Particle mechanical method was used to study the brittle behavior and mechanical properties of rock specimens with a grout-infilled flaw under uniaxial compression testing. Compared with rock specimens with open flaws, the rock uniaxial compressive strengths and Youngs moduli of rock specimens with infilled flaws increase, and their Poissons ratios decrease. Grout plays a more significant role in improving the mechanical properties of pre-cracked rock specimens with inclination angles of flaws less than 45°. In terms of failure modes, grout can affect the crack initiation, propagation and coalescence patterns in rock specimens with infilled flaws.
Dong Zhou Zhihong Zhao Hai Pu
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing Department of Civil Engineering, Tsinghua University, Beijing, China;State Key Laboratory for GeoMec State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining a
国际会议
西安
英文
192-201
2016-05-25（万方平台首次上网日期，不代表论文的发表时间）