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Abstract Under different temperatures(20 ℃，100 ℃，200 ℃，300 ℃)，the impact experiments of sandstone samples with different axial pressures(0，20，60，80 MPa) were carried out by a self-developed dynamic testing system under thermo-mechanical coupling. With the test results，the damage dissipation energy of rock under thermo-mechanical coupling can be calculated based on the principle of energy dissipation in conventional split Hopkinson pressure bar(SHPB). The results show that，at a given dynamic load，rock samples at temperatures of 20 ℃，200 ℃ and 300 ℃ and axial pressure of 20 MPa have the maximal energy-absorb capability；but at temperature of 100 ℃，rock samples under axial pressure of 0 MPa have the maximal energy-absorb capability. The results are helpful for understanding rock fracture mechanism of rock under high temperatures and can be used in the practical rock engineering.
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Received: 05 November 2012
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2013, Vol. 32 
