›› 1991, Vol. 12 ›› Issue (2): 81-86.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Type BEM-1-D76 Jack for Measuring Deformation Behavior of Rock Mass

Wang Wulin， Chen Jingxi   

  • Published:1991-02-15

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Abstract: In order to measure elastic modulus of rock in a borehole, Type BEM-1-D76 Jack was developed by our institute. In this paper, working principle, targets and measuring method of this jack are introduced. It's practical applications in a region with high stress are given. In addition, the jack are compared with other similar jacks in abroad. It is shown that Type BEM-1-D76 Jack is a new effective instrument for measuring deformation behavior of rock mass.

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