Abstract
Remote fracturing exists actually but it is not frequently observed in engineering practice. It attracts much attention on the study of growth process, rupture zone (or location), prerequisites and producing mechanism. A numerical model of a square rock block with a hole in the center was biaxially loaded, according to a constant lateral pressure coefficient, λ. The outer loading is applied in an increment of pressure step by step to simulate continuous and non-decreasing high-stress flow in deep rock. The failure characteristics, occurrence sequence and formation conditions of remote fracturing were discussed based on the numerical simulations using Rock Failure Process Analysis (RFPA2D) code. Research results show that under a lower confinement, remote fracturing might appear in the remote zone which is about 0.5r away from the perimeter of a circular opening, where r is the radius of a circular opening. Remote fracturing can arise repeatedly in en echelon forms when a circular opening is under the same stress boundary condition. Remote fracturing is mainly induced by tensile damage, simultaneously with some shear damage. The location of each sublayer of remote fracturing obeys the modulus ()i r (i = 1, 2, 3, 4), where i denotes the occurrence sequence of remote fracturing. A low lateral pressure is the root cause of the formation of remote fracturing.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: European Journal of Environmental and Civil Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.