Numerical Simulation of Mine Backfill and Surrounding Rock Deformation when Exploiting Sanshandao Seabed Gold Mine
Received date: 2016-06-30
Revised date: 2016-07-25
Online published: 2016-11-17
In order to interpret the deformation behavior of mine backfill and surrounding rock when mining Xinli deposit of Sanshandao gold mine，a quasi-two dimensional mechanical model was built as a plane strain problem.According to the mechanical behavior of fill mass，double-yield plasticity model was adopted for the body of the fill mass and strain-hardening or softening plasticity model was used in the grid of pillars and surrounding rocks.Several displacement monitoring points were set in positions of interest in a FLAC3D model and their results relatively really reflected the movement and deformation rules of the backfill and surrounding rock in cut-and-fill stoping by overhand method.The results showed that the body of fill mass was mainly subjected to compressive deformation in horizontal direction and had a cumulative effect on its volume deformation.And after the compressive deformation of the backfill in vertical direction reaches a maximum value，roof surrounding rock have a vertical upward component of movement under the action of horizontal tectonics stress.
LI Kepeng , MA Fengshan , GUO Jie , LU Rong , ZHANG Hongxun , LI Wei . Numerical Simulation of Mine Backfill and Surrounding Rock Deformation when Exploiting Sanshandao Seabed Gold Mine[J]. Gold Science and Technology, 2016 , 24(4) : 73 -80 . DOI: 10.11872/j.issn.1005-2518.2016.04.073
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