Perturbation effect of rock rheology under uniaxial compression

作     者：GAO Yan-fa HUANG Wan-peng QU Guang-long WANG Bo CUI Xi-hai FAN Qing-zhong 高延法;黄万朋;曲广龙;王波;崔希海;范庆忠

作者机构：School of Mechanics and Civil EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China College of Mining and Safety EngineeringShandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control(Shandong University of Science and Technology)Qingdao 266590China North China Institute of Science and TechnologyLangfang 065201China College of Water Conservancy and Civil EngineeringShandong Agricultural UniversityTaian 261000China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2017年第24卷第7期

页      面：1684-1695页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Projects(51474218,51304127,50474029)supported by the National Natural Science Foundation of China Project(2016M590646)supported by China Postdoctoral Science Foundation Project(2016121)supported by Qingdao Postdoctoral Applied Research Foundation,China 

主　　题：rock rheology perturbation effect experimental system strain threshold 

摘      要：Soft and medium-hard rocks are subjected to high rheology under high stress,and they are prone to a relatively large-degree of deformation when perturbed by external impacting *** phenomenon where rock deformation is developed due to external impacting perturbation in the rheological state is defined as the rock rheological perturbation *** work presents a new experimental system for investigating the rock rheological perturbation effect with experiments on medium-hard red *** from our analysis show that red sandstone changes under two mechanical mechanisms:deformation-hardening effects at low stress states,and damage-fracture effects at high stress states when impacted by certain external impacting *** sandstone tested in our experiments has a strain threshold of about 90% of the ultimate strain under the perturbation effect;the red sandstone is sensitive to a perturbed load when its actual strain exceeds the *** perturbed deformation process of the rock can be divided into three phases:decline,approximately constant speed and *** rock will be rapidly destroyed when the perturbed deformation accumulates to a certain *** perturbation effect of rock deformation under uniaxial compression is more obvious than that under axial *** on our experiment,a constitutive relation of the rock rheological perturbation effect is developed.