Explosives and Blasting (화약ㆍ발파)

Korean Society of Explosives and Blasting Engineering (대한화약발파공학회)
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The Study on Pressure Confine Effect of Blast Stemming Material and Plug Device Using Numerical Analysis Technique

수치해석 기법을 이용한 발파전색재료 및 플러그 장치의 폭발압 저항 효과에 관한 연구

  • 고영훈 (한국건설기술연구원 지반연구본부) ;
  • 곽기석 (한국건설기술연구원 지반연구본부) ;
  • 서승환 (한국건설기술연구원 지반연구본부) ;
  • 정영준 (주식회사 석성발파건설) ;
  • 김식 (주식회사 석성발파건설) ;
  • 정문경 (한국건설기술연구원 지반연구본부)
  • Received : 2022.05.12
  • Accepted : 2022.06.02
  • Published : 2022.06.30
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Abstract

Numerical simulation is the most widely used methods for evaluating blasting performance. This study, conducted the numerical analysis of shock chamber model to evaluate the pressure confine effect of the stemming material and plug device. The stemming effect was compared and evaluated with that of the STF-based stemming material currently under development and sand, which is a commonly used blast stemming material. Furthermore, to verify of enhancement the confine effect inside blast hole pressure, three types of stemming plugs were adopted for the numerical analysis. The numerical simulation results revealed that the STF-based stemming materials were superior to the general stemming material. Also, It is evaluated that the STF-based stemming and Plug system can not only prevent detonation gas from overflowing the borehole prematurely, but also prolong the action time and scope of detonation gas in the borehole effective.

본 연구에서는 발파전색재료와 밀폐용 플러그 장치의 압력 구속 효과를 평가하기 위하여 충격챔버 모델을 구성하여 발파 수치해석을 수행하였다. 현재 개발 중인 전단농화유체 기반의 전색물질과 일반적으로 사용되고 있는 전색재료인 모래의 전색효과를 서로 비교하였다. 또한 발파공 내부압력의 구속효과 강화를 위한 세 가지 형태의 플러그 장치를 시뮬레이션에 적용하였다. 그 결과로서 전단농화유체 기반의 전색재료가 모래전색보다 전색효과가 더 우수한 것으로 나타났다. 또한 전단농화유체 기반의 전색물질과 플러그 장치를 복합적으로 사용하였을 때 발파공 내의 폭발가스의 작용 시간과 영향범위를 효과적으로 향상할 수 있을 것으로 분석되었다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원의 주요사업 '(22주요-대5-중기지원국내-기술사업화) "고속 충격파 반응형 전단농화유체를 이용한 발파전색 기술개발"의 지원으로 수행되었습니다.

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