Test Study On The Perturbation Properties Of Rock Rheology

In this paper,through theoretical analysis and laboratory test,obtained rheological perturbation deformation law of roadway surrounding rock in the extremely soft formation and constitutive relationship of perturbation effect of soft rock rheology.This paper mainly has carried on the three aspects: one,in view of the external dynamic pressure perturbation caused rheological deformation and failure characteristics of surrounding rock in coal mine soft rock roadway of north soap,summarizing and analysis the deformation law of surrounding rock,concluding that surrounding rock deformation response to the perturbation on the different perturbation stages,expounding the characteristics of the rheological stress threshold point on each stage of the typical rock rheological law,and the concept of the rock “rheological perturbation effect” and “neighbourhood of ultimate strength”.Two,in view of the original test system for perturbation effect of rock rheology existing problems,through the upgrading,developing the RRTS-? triaxial test system for perturbation effect of rock rheology,the system is applicable to the axial load test on perturbation effect of rock rheology,and triaxial load test on perturbation effect of rock rheology under less than 40 MPa confining pressure.Selecting red sandstone for axial load test on perturbation effect of rock rheology,concluding that the law of rock rheology and perturbation deformation under the conditions of axial load,and build constitutive equation of perturbation effect of rock rheology on the basis of test results under the conditions of axial load.Three,taking the same red sandstone for triaxial load test on perturbation effect of rock rheology,exploring the law of rock rheology and perturbation deformation under the condition of the three stress,and build constitutive equation of perturbation effect of rock rheology of triaxial load on the basis of test results.