Reinforcement of rock mass with cross-flaws using rock bolt

Bo Zhang, Shucai Li, Kaiwen Xia, Xueying Yang, Dunfu Zhang, Shugang Wang, Jianbo Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)

Abstract

Rock bolting is one of the most effective and economical means of rock mass reinforcement. Existing studies of rock bolt reinforcement are mostly focused on rock masses without flaw, with a single flaw, or with parallel flaws. However in rock masses, cracks or flaws usually exist in the form of cross-flaws. In order to understand the impact of cross-flaws on rock bolt reinforcement and to further explore the differences of bolt reinforcement between rock mass with cross-flaws and rock mass with a single flaw, reinforced analog specimens with cross-flaws and with a single flaw were tested under uniaxial compressive condition. The experimental results show that the uniaxial compressive strength of the reinforced rock mass with cross-flaws in this research is higher than that of reinforced rock mass with a single flaw. This observation can be explained by the difference in the failure modes of reinforced specimens: the reinforced rock masses with a single flaw fail due to the formation of a shear crack while reinforced rock masses with cross-flaws fail as a result of a tensile fracture or interaction between tensile fracture and shear fracture.
Original languageEnglish
Pages (from-to)346-353
Number of pages8
JournalTunnelling and Underground Space Technology
Volume51
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Cross-flaws
  • Reinforcement
  • Rock bolt
  • Rock mass

ASJC Scopus subject areas

  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

Cite this