Effect of parallel joint interaction on mechanical behavior of jointed rock mass models. (February 2017)

• Record Type: Journal Article
• Authors: Yang, Xu-Xu; Jing, Hong-Wen; Tang, Chun-An; Yang, Sheng-Qi
• Is Part Of: International journal of rock mechanics and mining sciences. Volume 92(2017)
• Page Start: 40
• Page End: 53
• Publication Date: 2017-02
• Subjects: Rock mass -- Joint interaction -- Joint spacing -- Joint overlap -- Mechanical behavior; Rock mechanics -- Periodicals; Soil mechanics -- Periodicals; Mining engineering -- Periodicals; Roches, Mécanique des -- Périodiques; Sols, Mécanique des -- Périodiques; Technique minière -- Périodiques; 624.151305
• DOI: 10.1016/j.ijrmms.2016.12.010
• Languages: English
• ISSNs: 1365-1609

Abstract

Abstract: To better understand the interaction of parallel joints and its effect on the mechanical behavior of jointed rock mass models, the results of a physical experiment program undertaken in the laboratory were present in this manuscript. The joint spacing and joint overlap are varied to alter the relative positions of parallel joints in geometry. Accordingly, four basic failure modes identified from the testing results are tensile failure across the joint plane, shear failure along the joint plane, tensile failure along the joint plane, and intact material failure . The wing cracks from tensile failure across the joint plane mode represent the interaction between parallel joints which depends on the joint dip angle, joint spacing and joint overlap. With the increment of parallel joint interaction, the corresponding normalized strength and maximum displacement at peak stress of jointed rock mass models reduced generally except at α =0°. Highlights: Jointed rock mass models exhibited four different failure modes. Wing crack generation and coalescence were found to reflect the interaction between parallel joints. The parallel joints interaction depended on the joint orientation, joint spacing and joint overlap. The decrease of joint spacing and joint overlap increased the interaction between adjacent parallel joins. The increment of parallel joint interaction reduced the strength and deformation behavior of jointed rock mass models except at α =0°.