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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (4): 66-72.doi: 10.11872/j.issn.1005-2518.2016.04.066

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Monitoring and Research for the Deformation of Mine Backfill and Roof Surrounding Rock when Exploiting Sanshandao Seabed Gold Mine

MA Fengshan1，GUO Jie1，LI Kepeng1，LU Rong1，ZHANG Hongxun2，LI Wei2   

  1. 1.Key Laboratory of Shale Gas and Geoengineering，Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing    100029，China；
    2.Sanshandao Gold Mine，Shandong Gold Mining （Laizhou）Co.， Ltd.，Laizhou    261442，Shandong，China
  • Received:2016-06-10 Revised:2016-07-20 Online:2016-08-28 Published:2016-11-17

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Abstract:

Xinli deposit of Sanshandao gold mine is the first exploited hard rock mine under seawater in China，which mainly occurred in seabed rock between 20 and 670 m in depth and covered by only 2 to 3 meters thick clay aquiclude under seawater.To ensure mining safety and according to mining geological conditions，six intelligently memory displacement meters had been buried in 13#，17# and 37# transverse drifts along exploration lines of 63，71 and 111，respectively.Two buried ways were designed for the six meters.One was an updip drill threading through footwall rock into fill mass and for monitoring the relative deformation between backfill and footwall rock.Another one was an updip drill penetrating footwall rock and F1 main fracture surface into hanging wall rock and for recording the relative deformation between footwall and hanging wall rocks.And the deformation and movement characteristics of backfill and hanging wall rock have been obtained from September 2013 to December 2014.The results showed that the body of fill mass and hanging wall rock under seawater were subject to a comparatively small deformation and remained good stable during the monitoring process.

Key words: undersea mining, backfill, roof surrounding rock, deformation monitoring, Sanshandao gold mine

CLC Number: 

  • TU457

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