Welcome to Metal Mine! Today is Share:
×

扫码分享

Metal Mine ›› 2017, Vol. 46 ›› Issue (05): 154-158.

Previous Articles     Next Articles

Slope Stability Numerical Simulation of the Footwall Slope under Mining Conditions in Nanfen Open-pit Mine

Zhou Yijun1，Gao Yushan2，Tao Zhigang3，Wang shuo4，Hou Xinran5，Zhang Wei6   

  1. 1.College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China；2.Nafen Open-pit Iron Mine,Benxi Iron & Steel Group,Benxi 117000,China；3.School of Mechanics and Civil Engineering,China University of Mining and Technology (Beijing),Beijing,100083,China;4.College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063009,China;5.College of Mining Engineering,North China University of Science and Technology,Tangshan 063009,China;6.College of Qinggong,North China University of Science and Technology,Tangshan 063000,China
  • Online:2017-05-15 Published:2017-10-18

Abstract: The rainfall and blasting vibration are the main slope stability influence factors by analyzing the regional geological data of the footwall slope of of Nanfen Open-pit Iron Mine.Based on the early study results,the numerical simulation computational model of 5# slope profile is established,combing with SLOPE/W module,the influence of coupling effect of rainfall and blasting vibration to slope stability.The study results show that,the changes of pore water pressure is little before and after the rock mass expansion mining,however,after the excavation of approximately trapezoidal rock mass,a part of gravity stress is eliminated,which has a significant effect on the in-situ stress of slope.The whole safety of the slopes under the action of expansion is deteriorated,but the stability of slope remains stable.The slope section of 286~454 m is belongs to the dangerous slope,the stability of slope section of 454~474 m is good.

Key words: Expansion mining, Geo-studio, Blasting vibration, Rainfall, Slope stability