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Experimental study on the relationship between P-wave velocity and mechanical properties of damaged sandstone

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Document pages: 10 pages

Abstract: In order to better and more accurately understand the relationship between P-wave velocity and mechanical properties of damaged sandstone, uniaxial compression tests were carried out on sandstone subjected to different high temperature treatments or freeze-thaw (F-T) cycles. After high temperature treatment, the test shows that there is a general positive correlation between P-wave velocity and mechanical properties, although there are many exceptions. For a given P-wave velocity, the mechanical properties show significant differences. According to the mechanical test after F-T cycle, the mechanical properties and P-wave velocity show different trends. After 30, 40 and 50 cycles, UCS and Young s modulus decreased slightly, but increased and a dcrease occurred in the P-wave velocity. The UCS, Young’s modulus, and P-wave velocity represent different macrobehaviors of rock properties. A statistical relationship exists between the P-wave velocity and mechanical properties, such as the UCS and Young’s modulus, but no mechanical relationship exists. Further attention should be given to using the P-wave velocity to estimate and predict the mechanical properties of rock.

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