Academic Center

All Issues
Latest Issue
Most Download Articles
Most Read Articles

Study on rock visco-elastic plasticity analysis and yield criterion ofwater and rock interaction

Author:

LYU Hongmiao,LIN Xiaonan

Author Unit:

1. School of Civil Engineering, Liaoning Technical University, Fuxin , China; 2. Eastern Liaoning University, Dandong , China

Key Words:

fluid-solid coupling; yield function; cohesion strength; internal friction angle; degradation
  • Abstract
  • Paper Chart
  • Related Articles
  • Citation Format
In order to describe the creep features of the rock under different pore water pressure, a MTS815.02 rock testing machine was applied to have a fluid-solid coupling creep test of the saturated sandstone and according to the improved Druck-Prager Yield Function, the creep constitutive model of the rock was conducted. The study result showed that under the joint function of the effective stress and time, the strength parameters would be continuously deteriorated. Generally the cohesion strength was reduced by 16.89% and the internal friction angle was reduced by 7.93%. Under the external loading, the rock failure was mainly caused by the reduction of the cohesion strength. Therefore in the engineering practices, to prevent the failure and damage of the surrounding rock should control the cohesion strength and secondary should consider the control of the internal friction angle variation. Finally according to the improved Druck-Prager yield parameters, the creep constructive model of the rock was established as for describing on the rock attenuation creep, stable creep stage and accelerated creep.The fitting coefficients of the fitted curve and the experimental curve would be both above 0.95.
No Content Yet
No.06
June 15th,2022

Contact Us

  • All Rights of Website Desige Reserved©《COAL SCIENCE AND TECHNOLOGY》Editorial Department
  • 京ICP备05086979号-19

  • Address:8th Floor, Coal Building, District 13, Heping Street, Chaoyang District, Beijing:Ad & Finance Department(Room 1204),Editorial Department(Room 811)
  • Telephone:010-87986431(Ad Consult)
  • Mailbox: mtkxjs@vip.163.com