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利用裂隙岩体介质的脆性材料模型试验,在MTS810动三轴仪上对非贯通裂隙的半连续岩体介质动强度特性进行了不同动载下,不同裂隙几何特性的试验研究,研究结果显示:(1)非贯通裂隙介质与无裂隙介质的强度均随加载速率的提高而明显提高;(2)高频动荷下裂隙介质的单轴抗压强度具有一定的残余强度;(3)裂隙倾角45°时裂隙介质的强度最小,这些均与静载下裂隙的强度性质不同。
Based on the brittle material model test of fractured rock mass medium, the dynamic mechanical properties of semi-continuous rock mass with non-through fractures are tested under MTS810 dynamic triaxial apparatus under different dynamic loads and geometrical characteristics of different fractures. The results show that: (1) The strength of non-through fracture medium and non-fracture medium both increase obviously with the increase of loading rate; (2) The uniaxial compressive strength of fracture medium under high-frequency dynamic load has certain residual strength; (3) At 45 °, the strength of the fracture medium is the smallest, which is different from that of the static load.