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含裂隙岩石/类岩石试件在单轴压缩下的破坏特征已有较多研究,但对含X型裂隙试件单轴拉伸下的破坏特征尚无研究结论。对含两组叠置X型裂隙类岩石材料试件进行了单轴拉伸试验,并与对应试件单轴压缩情况的已有实验结果进行了对比,研究了含两组叠置X型裂隙类岩石试件单轴拉伸下的岩桥贯通行为及强度特征。研究结果表明:含两组叠置X型裂隙类岩石材料试件在单轴拉、压作用下的破坏模式及岩桥贯通模式表现不同,在单轴拉伸作用下含两组叠置X型裂隙类岩石试件岩桥处不会出现贯通现象;含两组叠置X型裂隙类岩石材料试件的次裂隙位置影响试件单轴拉伸强度,在主裂隙位置固定情况下,次裂隙角度与最大拉应力方向垂直时试件强度最低,次裂隙角度与最大拉应力方向相同时试件强度最高。
There have been many studies on the failure characteristics of fractured rock / rock-like specimens under uniaxial compression. However, there is no conclusion about the failure characteristics under the uniaxial tension of fractured rock specimens. The uniaxial tensile test was carried out on two kinds of specimens with stacked X-type fractured rock materials and compared with the existing experimental results on the uniaxial compression of the corresponding specimens. ROCKBORNE THICKNESS CHECK BEHAVIOR AND STRENGTH CHARACTERISTICS UNDER UNIAXIAL TENSION OF ROCK CRUSTS. The results show that the failure mode and rock through mode of rock specimen containing two stacked X-type fractured rock materials under uniaxial tension and compression are different. Under uniaxial tension, Cracks in rock specimen rock through the bridge will not occur through the phenomenon; containing two sets of superimposed X-type fractured rock material specimens of the secondary crack location uniaxial tensile strength test specimen, the main crack in the case of fixed position, the secondary cracks When the angle is perpendicular to the direction of the maximum tensile stress, the strength of the specimen is the lowest, and the strength of the specimen is the highest when the direction of the secondary cracks and the direction of the maximum tensile stress are the same.