Original data of compression test for cracked specimen

To explore the crack propagation and failure process of surrounding rock with deep cracks under external stress adjustment, the failure of cracked specimens under external load was studied. The required test pieces were prepared by using a self-developed mold and using cement mortar as a similar material. Through the uniaxial compression test, the basic mechanical properties of the material and the specimen were obtained, and the crack propagation process and the failure evolution mechanism of the specimen under different crack inclination angles and loading rates were revealed. The test results show that the presence of cracks can significantly affect the overall strength of the specimen, and the strength and failure mechanism of the specimen vary with the change in the crack angle and rate of loading. The larger the crack inclination angle, the lower the strength of the specimen, and the two are linearly related. With the increase in the loading rate, the failure mode of the specimen ...