The Strength Effect of Pre-Cracked Rocks at Different Angles
2014 ◽
Vol 522-524
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pp. 1414-1418
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In this paper pre-cracked rock is used to study the strength affect by the coal rock internal fissures, through uniaxial compression tests to observe the different perspectives cracks on rock strength by using the precast specimens. The experimental results show that: the strength of specimens with crack angle increases, decreases and then increases, till reaches a maximum at 90°. Based on the force divided, destruction of different angles of prefabricated crack growth path can be divided into: shear failure, tensile failure and tensile shear composite damage.
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2019 ◽
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2020 ◽
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