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Parameter analysis of anchor bolt support for large-span and jointed rock mass

  • Li Xi-bing Email author
  • Zhou Zi-long 
  • Li Qi-yue 
  • Hu Liu-qing 
Article

Abstract

In order to obtain the optimal parameters of anchor bolt supporting system for large-span and jointed rock mass in Kaiyang Phosphor Mine, it is expensive and unavailable with the method of in-situ experiments. This paper describes a numerical modeling with discrete element method for the supporting effects of different type of anchor bolts. The anchor bolts with variant length of 0.5 m, 0.8 m, 1.0 m, diameter of 10 mm, 15 mm, 20 mm, setting spacing of 3.0 m, 2.5 m, 2.0 m, and setting angle of 10°, 20°, 30°, are simulated respectively. The results show that there exist optimal parameters of anchor bolt support for large-span and jointed rock mass. For the bolt support of the concerning, the optimal length is 2.5–3.5 m, the diameter is 25–35 mm, the spacing is 0.5–0.6 m, and the setting angle is 105°.

Key words

jointed rock mass anchor bolt support optimal parameter 

CLC number

TD353+.6 

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Copyright information

© Central South University 2005

Authors and Affiliations

  • Li Xi-bing 
    • 1
    Email author
  • Zhou Zi-long 
    • 1
  • Li Qi-yue 
    • 1
  • Hu Liu-qing 
    • 1
  1. 1.School of Resources and Safety EngineeringCentral South UniversityChangshaChina

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