Open AccessUniaxial Compression Properties of Marble with Crossed Double Fissures at Different Angles in Mineral Resource Exploration
Author(s) -
Tang Lizhong,
Yihao Tu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/804/2/022088
Subject(s) - materials science , acoustic emission , composite material , compression (physics) , compression test , stress (linguistics) , structural engineering , engineering , philosophy , linguistics
In order to study the effect of the two prefabricated crack angles of the prefabricated cross-shaped cracks on the peak stress, crack development and acoustic emission characteristics of the marble specimens under uniaxial compression, the uniaxial compression test and acoustic emission were carried out by using natural marble specimens to prefabricate the intersecting cracks at different angles. test. Experimental research shows that: (1) The strength of the prefabricated cracked specimen is significantly lower than that of the complete specimen, and the strength of the specimen decreases as the sum of the angles between the two cracks and the loading direction increases. When the sum of the angles is the same, the strength of the two cracks the greater the angle of the crack with the load direction, the lower the strength. (2) The test piece always cracks first at the end of the crack with a larger angle with the loading direction, and the through crack that leads to the final failure of the test piece is also gradually developed from the two ends of the crack. (3) The larger the angle between the two prefabricated cracks of the specimen and the load direction, the higher the accumulated acoustic emission energy, the higher the accumulated acoustic emission energy, and the lower the strength of the specimen.