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Metal Mine ›› 2013, Vol. 42 ›› Issue (05): 34-36+40.

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Study on Support and Construction Technology of Three-dimensional Oblique Intersection with Large Section

Xiao Yu1,2,Han Lijun1,2,Zhang Yang1,2,Mei Fengqing1,2   

  1. 1.State Key Laboratory of Deep Geomechanics and Underground Engineering;2.School of Mines,China University of Mining and Technology
  • Online:2013-05-15 Published:2013-06-08

Abstract: In order to solve the problem of poor supporting effect of the three-dimensional Oblique intersection,which was caused by large cross section,big excavation disturbance and construction difficulty,an active and passive combined rigid-flexible combination support was proposed. Pre-reinforcement to above haul lane was adopted with bolt-mesh-anchor support system firstly,then the Steel support was applied for the cross-section of the two roadways. Finally,the cover-excavation method is used to the construction of intersection roadway. The practice results show that the application of this support and construction technology achieved a better effect of supporting. It plays the role in ensuring the security,lowering the construction difficulty,minimizing the transport time hindered.

Key words: Three-dimensional intersection, Bolt-mesh-anchor support, Steel support, Cover-excavation method