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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (2): 70-75.doi: 10.11872/j.issn.1005-2518.2017.02.070

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Study on the Stope Displacement Unstability Process Under Complex Mining Environment

MENG Kun,LUO Zhouquan,QIN Yaguang   

  1. School of Resources and Safety Engineering,Central South University,Changsha    410083,Hunan,China
  • Received:2016-07-01 Revised:2016-11-03 Online:2017-04-28 Published:2017-05-12

Abstract:

Mass vertical displacement collapsed in environment of complex mining stope always cause instability problems.By combining with the engineering practice of collapse in -320 m midway through the main orebody buckling in certain large lead and zinc underground mines,the three dimensional computer numerical program 3DEC was used to analyze the vertical displacement of stope filling body and around the degree,influence range and maximum shear stress distribution.It provides an important basis for the safe and efficient recovery of hidden resources and the determination of reasonable filling technology and mining methods.The results show that 0# ore body above the mined-out area overall sinking,the maximal sinking displacement is up to 2 m.The maximum shear strain increment region is mainly located in 0 # stope part,and eventually formed a U-shaped maximum shear strain increment through belt.The 0# stope collapse caused upper 0# stope ore body,mined-out area of N0-1#,N1-2#,S0-1#FU  and S0-1# FU-1 located in the area above the slip surface,and N2-3# and S1-2# stope in the collapse edge.It is determined as the influence area of the collapse area.

Key words: complex environment, vertical displacement, stope unstability shear stress, 3DEC, hidden resources

CLC Number: 

  • TD325

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