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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (5): 47-56.doi: 10.11872/j.issn.1005-2518.2017.05.047

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Analysis on the Possible Failure Modes of Water Burst Prevention Structures of F1 Fault Caused by Undersea Mining in Sanshandao Gold Mine

MA Fengshan1，LI Kepeng1，DU Yunlong2，HOU Chenglu2，LI Wei2 ，ZHANG Guodong2   

  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:2017-07-10 Revised:2017-08-26 Online:2017-10-30 Published:2018-02-12

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Abstract:

Different mines generally have different water-inrush forms and mechanisms.Xinli mining area locates under sea floor，of Sanshandao gold mine.Some factors，such as hydrogeological condition，surrounding rock mechanics properties，orebody morphology，and the relative position to default decided water inrush mechanism which is different from that of other mines especially coal mine.The possible failure modes of seawater burst prevention structures are closely associated with the Quaternary clay aquiclude on top of orebody and the fault gouge aquiclude of F1.So the isolation layer breaking and the fault slipping of  F1 now are the possible water-inrush modes of Xinli mining area.Based on illuminating the essential attributes of the water burst prevention structures，and combined with proper hydrogeological structures of the Xinli seabed mine exploitation.Analysis of the possible failure modes of F1 in different working conditions were carried out by numerical simulation，The simulation results showed that when the mining scale of Xinli orebody was small，the slip range of  F1 was limited in the scope near the mined area and had no effect on the section of F1 where penetrating the reserved isolation layer.But with the increase of mining scale，F1  near the isolation layer would terminally slide.

Key words: Sanshandao gold mine, undersea mining, F1 ore-controlling fault, water burst prevention structure, numerical simulation, failure mode

CLC Number: 

  • TD807

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