›› 2011, Vol. 32 ›› Issue (1): 146-150.

• Geotechnical Engineering • Previous Articles     Next Articles

Acceleration response analysis of surrounding rock with different anchorage parameters subjected to explosive loads

YANG Zi-you1，YANG Ben-shui1，GU Jin-cai2，LI Yong-chi3，GAO Guang-fa3   

  1. 1. School of Civil Engineering, Anhui University of Architecture, Hefei 230022, China; 2.The Third Research Institute of the Corps of Engineering, General Staff of CPLA, Luoyang, Henan 471023, China; 3. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China
  • Received:2009-09-25 Online:2011-01-10 Published:2011-01-19

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Abstract:

If acceleration of rock mass is too large, the surrounding rock of underground cavern is not stable. By analyzing time-history curves of acceleration obtained by model test, the acceleration response characteristics of surrounding rock with different anchorage parameters in underground cavern subjected to explosive loads are studied. The forms and peak values of the time-history curves of acceleration of underground cavern’s crown, floor and two sides are explained respectively. Because of the different reinforcing modes, the distinctions of the acceleration response of surrounding rock of underground cavern are compared emphatically. The results indicate that the time-history curves of the vertical acceleration of crown and the horizontal acceleration of floor right side are smooth enough; but the vibration of the time-history curves of the vertical acceleration of floor and the left side are larger than the others. The acceleration of the crown is the largest than the other positions. For the cavern of the smallest spacing of rock bolts in four underground caverns, the acceleration of its crown and two sides is smaller than the other caverns; but the acceleration of its floor is larger slightly than the others’. By means of comparing and analyzing above, reducing the spacing of the rock bolts can enhance the stabilization of underground cavern.

Key words: model test, explosive stress waves, time-history curve, acceleration response, vibration characteristics

CLC Number: 

  • TU 457
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