... abstract gas shale air pressure gas pressure Reservoir Characterization complex reservoir specific energy Mining Science experimental study strain rate international journal compressive strength dynamic failure behavior Experimental study on dynamic failure behaviors of gas shale...

..., University of Science and Technology Beijing, Beijing, China ABSTRACT: Most studies on strength criterion generally focus on the compressive strength rather than tensile strength. In fact, tensile strength is one of the most important mechanical properties of rock and also a significant controlling parameter...

... is temperature, N is number. From (Fig. 3), we know the uniaxial compres- sive strength of saturated Cretaceous sandstone increases with temperature decreasing. The uniax- ial compressive strength of Medium grained sand- stone increases from 11.335 MPa to 16.943 MPa, and the strength is improved by about 49.4 7...

... features, forging the unique engineering properties of this special type of rock. 3 UNIAXIAL COMPRESSIVE STRENGTH The experimental results Table 1 indicate a wide distribution of the compressive strength of the reef rock, meaning that it falls into the range between extremely soft rock and soft rock. Its...

... ratio characteristics of cemented filling body with different cement-sand ratio have been studied by acoustic emission under uniaxial compression test. The results showed that the damage threshold of cemented filling body of cement-sand ratio 1:4 is 33%~41% of uniaxial compressive strength...

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