›› 2014, Vol. 299 ›› Issue (2): 429-434.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Comparison of triaxial compression test and data processing methods for rock salt

WANG Guan1, 3, XIE Ling-zhi2, 3, HOU Zheng-meng1, 4, LIU Jian-feng2, XING Wei1, 5   

  1. 1. Sino-German Energy Research Center, Sichuan University, Chengdu 610065, China; 2. Key Laboratory of Energy Engineering Safety and Disaster Mechanics, Ministry of Education, Sichuan University, Chengdu 610065, China; 3. College of Architectural and Environment, Sichuan University, Chengdu 610065, China; 4. Institute of Petroleum Engineering, Clausthal University of Technology, Clausthal 38678, Germany; 5. Energy Research Center of Lower Saxony (EFZN), Goslar 38640, Germany
  • Received:2013-05-22 Online:2014-02-11 Published:2014-02-18

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Abstract: Strength and deformation characteristics of rock salt are extremely important parameters for the design, construction and safe operation of underground energy and waste repositories. However, these require accurate measurements of the strength parameters for the concerned rock salt. In this study, samples of rock salt from Jintan in Jiangsu province and Jianghan in Hubei province, respectively, are chosen for triaxial compression tests to locally determine their short-term strength and deformation parameters. This allows a comparison of the Germany test and data processing methods, performed on behalf of the Western countries, and the Chinese test and data processing methods. Based on the German method including its shortcomings for determining the damage boundary of Jintan rock salt which was employed in the German short-term strength test, this paper presents an improved method and calculates the damage boundary for the Jintan rock salt. Comparison between the two test and data processing methods reveals that German experimental measurements yield lower strength parameter values for rock salt with large deformation. Hence the German test and data processing methods, in which the change of the sample cross-section area is considered and the data are secondarily revised by using scientific strain instead of engineering strain.

Key words: rock salt, short-term strength, test method, data processing method

CLC Number: 

  • TU 455
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