冻融作用下条带状磁铁石英岩破裂失稳过程裂纹演化特征试验研究

邵国梁, 夏冬, 贾淯斐, 李铸熙, 严加驹

Experimental Study on Crack Evolution Characteristics of Banded Magnetite Quartzite During Fracture Instabiligy Under Freeze-thaw Action

Guoliang SHAO, Dong XIA, Yufei JIA, Zhuxi LI, Jiaju YAN

表4 不同冻融次数下条带状磁铁石英岩临界系数

Table 4 Critical coefficients of banded magnetite quartzite under different freeze-thaw cycles

冻融循环次数/次 临界系数k 冻融循环次数/次 临界系数k 干燥 1.54 100 1.20 饱水 1.57 130 1.25 10 1.49 180 1.4 20 1.47 230 1.34 40 1.41 280 1.45 70 1.29