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Experimental Analysis of the Acoustic Emission Characteristics of Sandstone Specimens under Uniaxial Loading Tests

LI Bo1,SUN Qiang2,WANG Si-yuan1,LIN Zong-zong1(1.School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou,Gansu 730000,China; 2.School of Resources and Earth science,China university of Mining and Technology,Xuzhou,Jiangsu 221116,China)  
Acoustic emission(AE) is a ubiquitous phenomenon associated with deformation and failure of rock material.Experiments on AE characteristics of full-regime sandstone failure are conducted with a stiffness test machine under the condition of uniaxial compression.The relationships of stress characteristics with time-strain level and AE characteristics with time-strain level are obtained in the failure process of sandstone specimens.On the basis these results,the relationship of AE characteristic with strain level is discussed.The approximate critical point of the sandstone specimen is determined to be 0.9 through the curve fitting method.This study provides theoretical guidance to the monitoring and prediction of sandstone behavior.
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