Uniaxial Experimental Analysis on Creep Properties of Deep Limestone
LIU Dong yan,ZHAO Bao yun,LIU Bao xian and XUE Kai xi
DOI:10.11835/j.issn.1674-4764.2010.04.007
Received September 15, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 33-37
- Abstract
The uniaxial creep tests were carried out for deep limestone from Chongqing adoptal by the MTS815 servo controlled rock mechanical test system. Meanwhile, the DISP 2 based AE system was used to test acoustic emission (AE) signal. It is found that AE can better reflect rock microstructure such as diffusion of lattice defects, opening and close of the pore and fracture, compatible deformation among particles, the generation and connection of micro ruptures. Through different creep model parameter inversion, 〖JP2〗it is concluded that either the logarithmic function creep model or the exponential function can better reflect deep rock creep deformation behavior and the logarithmic function creep model is much better. 〖JP〗