WANG B, HU S Y, HUANG Z K, et al.Study on damage law of rheological disturbance in the neighborhood of rock strength limit[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):15-25.

doi:10.16186/j.cnki.1673-9787.2021080063

Received:2021/08/17

Revised:2021/11/16

Published:2023/01/25

Study on damage law of rheological disturbance in the neighborhood of 

rock strength limit

WANG Bo1, HU Shiyu1, HUANG Zikang1, WANG Ling1, YANG Peiji1, LU Changliang1, WANG Jun2, HUANG Wanpeng3

1.School of Emergency Technology and Management，North China Institute of Science and Technology，Beijing  101601，China；2.School of Civil Engineering，Shandong Jianzhu University，Jinan  250101，Shandong，China；3.School of Energy and Mining Engineering，Shandong University of Science and Technology，Qingdao  266590，Shandong，China

Abstract:In order to study the evolution law of rock damage in the neighborhood of strength limit，red sandstone was taken as the study object，and the RRTS-Ⅳ rheological disturbance test system independently developed and nuclear magnetic resonance test equipment were used to carry out the experimental study of rock damage caused by rheological disturbance in the neighborhood of strength limit.The experimental results showed that with the increase of the disturbance times，the rock in the neighborhood of strength limit was sensitive to disturbance response，and the more the disturbance times were，the greater the strain of rock got，the smaller the instantaneous elastic modulus and the faster the failure speed.Through the identification of rock rheological data parameters under different disturbance times，the damage constitutive model of rock rheological disturbance effect was obtained，and the model verification proved that the test results were in good agreement with the fitting curve，which showed that the establishment of this model was reasonable.The damage characteristics of rocks in the neighborhood of strength limit were detected by nuclear magnetic resonance test equipment，and the areas of T2 spectrum curve and peak spectrum curve were analyzed.The T2 spectrum curve shifted，the third peak appeared and the total area of peak spectrum increased.The results could enrich the theoretical system of rock rheological disturbance effect.

Key words:neighborhood of strength limit;rock strength;constitutive relation;rheological disturbance;nuclear magnetic resonance;pore structure

 岩石强度极限邻域内流变扰动损伤规律研究_王波.pdf