›› 2011, Vol. 32 ›› Issue (5): 1394-1398.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of surface crack growth in layered salt rock under uniaxial compression

LI Lin1, CHEN Jie1, JIANG De-yi1, YANG Chun-he2, LIU Chun3   

  1. 1. Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Disaster Control Engineering of Ministry of Education, Chongqing University, Chongqing 400044, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. College of Safety Engineering, Chongqing University of Science and Technology, Chongqing 400042, China
  • Received:2010-01-29 Online:2011-05-10 Published:2011-09-23

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Abstract: The surface crack growth and dispersion in layered salt rock under uniaxial compression are studied by fluorescence and mesomechanical techniques; the differences of physico-mechanical properties of salt rock at home and abroad are briefly analyzed. The experimental results show: for pure salt rock, the surface cracks are mainly sliding cracks between salt grains. Destructive macro cracks are shapes with expand and joint coalescence of cracks between salt grains which impacted by size and uniformity of distribution of salt grains, strength and deformation of salt rock grains abroad are greater than domestic salt rock. For pure intercalation salt rock, the surface crack grown at the mixture of several mineral deposits, and which distribution effected by interlayer mineral composition and structure. For laminated salt rock, the surface crack distribution is effected by form of interfacial transition between interlayer interface and salt rocks. Generally, the serrated cracks mainly form by the main crack expansion to interlayer; the cracks with transition clearly and containing a thin layer of mud form by main crack and mud layers loose cracks assemble and expanding

Key words: layered salt rock, uniaxial compression, fluorescence, mesomechanics, surface crack

CLC Number: 

  • TU 45
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