Numerical investigation on the sensitivity of jointed rock mass strength to various factors

作     者：NIU Shuangjian JING Hongwen HU Kun YANG Dafang 

作者机构：State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining & Technology Xuzhou 221008 China School of Civil Engineering Henan Polytechnic University Jiaozuo 454003 China 

出 版 物：《Mining Science and Technology》 (矿业科学技术（英文版）)

年 卷 期：2010年第20卷第4期

页      面：530-534页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0706[理学-大气科学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The financial supports from the National Natural Science Foundation of China (No.50674083) the Eleventh Five-Year Plan of National Scientific and Technological Support of China (No.2008BAB36 B07) the Jiangsu Civil Engineering Graduate Center for Innovation and Academic Communication Foundation 

主　　题：jointed rock mass peak strength residual strength variance analysis sensitivity 

摘      要：The mechanical properties of jointed rock masses, such as strength, deformation and the failure mechanism, can be understood only by studying the sensitivity of jointed rock mass strength (both the peak and residual strengths) to the factors that affect it. An orthogonal design of uniaxial compression tests was simulated on eighteen groups of jointed rock specimens having different geometric and mechanical properties using RFPA2D (Rock Failure Process Analysis) code. The results show that the peak strength is controlled by the geometric parameters of the joints, but that the residual strength is controlled by the mechanical prop- erties of the joint interfaces. The failure mode of jointed rock specimens is mainly shear failure. Joint quantity, or density, is the most important index that affects jointed rock mass strength and engineering quality.