한국지반신소재학회논문집 (Journal of the Korean Geosynthetics Society)

  • 제22권3호
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  • Pages.71-86
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  • 2023
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  • 2508-2876(pISSN)
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  • 2287-9528(eISSN)
한국지반신소재학회 (Korean Geosynthetics Society)
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3차원 수치해석을 통한 암반 발파 시 암반 사면의 진동속도 거동 분석

Analysis of Vibration Velocity Behavior of Rock Slope in Rock Blasting by Three-Dimensional Numerical Analysis

  • Chang-Young Park (Department of Regional Infrastructure Engineering, Kangwon National Univ.) ;
  • Jae-Young Heo (Department of Regional Infrastructure Engineering, Kangwon National Univ.) ;
  • Yong-Jin Kim (Smart Geotech Co., Ltd) ;
  • Seung-Joo Lee (Korean Peninsula Infrastructure Special Committee, Korea Institute of Civil Engineering and Building Technology) ;
  • Young-Seok Kim (Northern Infrastructure Specialized Team, Korea Institute of Civil Engineering and Building Technology) ;
  • Ji-Hoon Kim (Nada Construction Co., Ltd) ;
  • Yong-Seong Kim (Department of Regional Infrastructure Engineering, Kangwon National Univ.)
  • 투고 : 2023.08.07
  • 심사 : 2023.09.14
  • 발행 : 2023.09.30
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초록

본 연구에서는 암반 발파 시 발생하는 사면 재해를 방지하기위해 지중 관입형 변위센서를 이용한 암반 발파 시험을 수행하고 3차원 유한요소 수치해석을 통해 지중 관입형 변위센서의 적용성 검증 및 암반 발파 시 진동속도에 영향을 미치는 매개변수에 대해 고찰하였다. 암반 발파 시험 결과 지중 관입형 변위센서는 암반사면 거동 계측에 적용 가능한 시스템임을 확인하였으며, 수치해석 결과 암반 발파 시 진동속도에 가장 큰 영향을 미치는 매개변수는 단위중량인 것으로 분석되었다. 또한, 발파원과 멀어질수록 진동속도는 급격하게 줄어들고 발파원과 가까울수록 동탄성계수와 단위중량의 차이에 따라 최대 진동속도 차이는 크게 발생하며 내부마찰각과 점착력 변화에 따른 영향은 거의 없는 것으로 판단된다.

Rock blasting tests using underground penetration-type displacement sensors were conducted, and three-dimensional finite element numerical analyses were performed to assess their applicability and mitigate slope hazards during rock blasting. Additionally, parameters influencing vibration velocity were investigated during the tests. The results confirmed that underground penetration-type displacement sensors are suitable for monitoring rock slope behavior, and the numerical analyses revealed that the most influential parameter on vibration velocity during rock blasting is the unit weight. Furthermore, it was observed that vibration velocity decreases significantly with distance from the blast source, and proximity to the source leads to substantial variations in vibration velocity due to differences in elastic modulus and unit weight. Changes in internal friction angle and adhesive strength had minimal impact.

키워드

과제정보

This work was supported by the Korea Agency for Infrastructure Technology Advacement(KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant RS-2022-00144281).

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