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2020 Vol.30, Issue 1 Preview Page

Original Article

Slope Stability Assessment and Factor Analysis of Surface Mines due to Blasting

발파로 인한 노천광산 사면안정성 평가 및 인자분석

Jong-Gwan Kim1*
김 종관1*
1Senior Manager, Boleo Department, Korea Resources Corporation
1한국광물자원공사 볼레오사업실 선임과장
* Corresponding Author
29 February 2020. pp. 98-107
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Abstract

In surface mining, it is very important to create a mining area for economical mining. This study examined the contribution of design factors on slope stability with different slope design and blasting conditions. The design factors were the properties of the rock, the slope angle and the bench height, and the blasting conditions were reflected at different explosive weight and distances. The safety factor of slope was calculated by shear strength reduction method through 3D modeling, and the contribution rate of rock slope was 94.8%, which is relatively higher than other design factors, slope angle 0.89%, bench height 0.58%, and blasting It is shown that it affects about 3.73%, and it can be seen that blasting at a close distance can affect the stability of the slope.

Keywords
Slope stability
Surface blasting
Safety factor
Robust design
Contribution rate

노천채광에서 경제적인 채광을 위한 채광장 형성은 매우 중요하며, 대규모 채광을 위한 발파작업은 사면의 안정성에 영향을 미칠 수 있으므로 이에 대한 고려가 필요하다. 본 연구에서는 사면설계와 발파 조건을 달리하면서 사면 안정성에 미치는 영향 인자의 기여율을 검토하였다. 설계인자는 암반의 물성, 사면각도, 벤치높이이며, 발파 조건은 장약량과 거리를 달리하여 반영하였다. 사면의 안전율은 3차원 모델링을 통해 전단강도감소기법으로 산출하였으며, 기여율은 암반사면의 물성이 94.8%로 다른 설계인자들에 비해 상대적으로 높았으며, 사면각도 0.89%, 벤치높이 0.58%, 발파는 3.73% 정도의 영향을 미치는 것으로 나타나, 사면과 근접거리에서의 발파는 사면의 안정성에 영향을 줄 수 있음을 알 수 있다.

키워드
사면안정
노천발파
안전율
강건설계
기여율
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Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 30
  • No :1
  • Pages :98-107
  • Received Date : 2020-02-09
  • Revised Date : 2020-02-18
  • Accepted Date : 2020-02-20
  • DOI :https://doi.org/10.7474/TUS.2020.30.1.098
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