›› 2011, Vol. 32 ›› Issue (4): 1234-1240.

• Numerical Analysis • Previous Articles     Next Articles

FLAC3D analysis of interaction between goaf and opencut mining slope with 3D geological model using SURPAC

JIANG Xue-liang1, 2，YANG Hui1, 2，CAO Ping3   

  1. 1. School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China; 2. School of Civil Engineering, Hunan City University, Yiyang, Hunan 413000, China;3. School of Resources and Safety Engineering, Central South University, Changsha 410083, China
  • Received:2010-03-04 Online:2011-04-10 Published:2011-04-29

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Abstract:

The 3D geological model of Wengfu phosphate mine is built with SURPAC software; and the interaction between the goaf and open cut mining is calculated by the fast Lagrangian analysis of continua in three dimensions (FLAC3D) through the interface program; and the monitoring points of slope and goaf are set in order to monitor the stress and displacement. The calculation results show that the goafs markedly change the stress distribution of slope and around goafs and cause the horizontal displacements of goafs to increase obviously. The goafs also change the vertical displacement and evidently influence the regions between goafs and cause the rebound displacement to decrease. The stresses and displacements appear regularity changes. The goafs evidently change the distribution of plastic zones. To the slope with goafs, the regions of plastic zone decrease with the slope excavation but appear tensile failure zone on the slope surface; and the goafs cause the safety factor of slope to reduce.

Key words: 3D geological model with SURPAC software, FLAC3D, goaf, opencut mining slope, interaction

CLC Number: 

  • TU 457
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