A failure criterion for shale considering the anisotropy and hydration based on the shear slide failure model

作     者：Qiangui Zhang Bowei Yao Xiangyu Fan Yong Li Nicholas Fantuzzi Tianshou Ma Yufei Chen Feitao Zeng Xing Li Lizhi Wang Qiangui Zhang;Bowei Yao;Xiangyu Fan;Yong Li;Nicholas Fantuzzi;Tianshou Ma;Yufei Chen;Feitao Zeng;Xing Li;Lizhi Wang

作者机构：Petroleum Engineering SchoolSouthwest Petroleum UniversityChengdu 610500China Department of CivilGeological and Mining EngineeringÉcole Polytechnique de MontréalMontreal H3T 1J4Canada State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu 610500China School of Geoscience and TechnologySouthwest Petroleum UniversityChengdu 610500China State Key Laboratory of Coal Mine Disaster Dynamics and ControlChongqing UniversityChongqing 400030China Department of CivilChemicalEnvironmental and Materials EngineeringUniversity of BolognaBologna 40136Italy Department of Civil and Mineral EngineeringUniversity of TorontoToronto M5S 1A4Canada 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2023年第33卷第4期

页      面：447-462页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：The financial supports from the Sichuan Science and Technology Program(No.2022NSFSC0185) the National Natural Science Foundation of China(Nos.42172313 and 51774246) the Natural Science Foundation of Chongqing(No.cstc2020jcyj-msxm X0570) the Fundamental Research Funds for the Central Universities(Nos.2020CDJ-LHZZ-004,2020CDJQY-A046) the State Key Laboratory of Coal Mine Disaster Dynamics and Control(No.2011DA105287-MS201903) The scholarship supports provided by the China Scholarship Council(CSC) 

主　　题：Shale Failure criterion Mechanical strength Shear slide failure Anisotropy Hydration 

摘      要：A failure criterion fully considering the anisotropy and hydration of shale is essential for shale formation stability ***,a novel failure criterion for hydration shale is developed by using Jaeger’s shear failure criterion to describe the anisotropy and using the shear strength reduction caused by clay minerals hydration to evaluate the *** failure criterion is defined with four parameters in Jaeger’s shear failure criterion(S_(1),S_(2),a andφ),three hydration parameters(k,ω_(sh)andσ_(s))and two material size parameters(d and l0).The physical meanings and determining procedures of these parameters are *** accuracy and applicability of this failure criterion are examined using the published experimental data,showing a cohesive agreement between the predicted values and the testing results,R^(2)=0.916 and AAREP(average absolute relative error percentage)of 9.260%.The error(|D_(p)|)is then discussed considering the effects ofβ(angle between bedding plane versus axial loading),moisture content and confining pressure,presenting that|Dp|increases whenβis closer to 30°,and|D_(p)|decreases with decreasing moisture content and with increasing confining ***,|D_(p)|is demonstrated as being sensitive to S1and being steady with decrease in the data set whenβis 0°,30°,45°and 90°.