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A preliminary study on the excavation sequence of a room-and-pillar underground structure by the drill-and-blast method

발파 굴착에 의한 주방식 지하구조물의 굴착공기 분석 연구

  • Lee, Chulho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Hyun, Younghwan (ESCO Consultant & Engineers Co., Ltd.) ;
  • Song, Junho (ESCO Consultant & Engineers Co., Ltd.) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 이철호 (한국건설기술연구원 지반연구소) ;
  • 현영환 ((주)에스코컨설턴트) ;
  • 송준호 ((주)에스코컨설턴트) ;
  • 장수호 (한국건설기술연구원 지반연구소)
  • Received : 2015.10.16
  • Accepted : 2015.10.30
  • Published : 2015.11.30

Abstract

A room-and-pillar underground structure is characterized by its grid-type array of room and pillar. As a result, its construction and economical efficiency can be governed by excavation sequence. In this study, the construction period by the drill and blast method which can be treated as a main sequence for excavation was examined by considering the regulation for blasting and construction standard of estimation in Korea. To evaluate the construction period for the room-and-pillar underground structure constructed in 4 kinds of square-type area ($30{\times}30{\sim}57{\times}57m$), the concurrent excavation pattern which was suggested in the previous researches was used. From the suggested condition, the total construction period by drill-and-blast method can be estimated with the consideration of the construction area, number of jumbo drill and faces in operation.

주방식 지하구조물은 여러 개의 암주의 룸으로 구성된 격자 형태의 구조물로 굴착순서에 따라 주방식 지하구조물의 시공성과 경제성이 좌우될 수 있다. 본 연구에서는 주방식 지하구조물의 굴착공정에서 중요하게 다뤄질 수 있는 발파굴착 공정을 장비 운영과 현행 발파 규정 및 건설공사 표준품셈에 근거하여 검토하였다. 굴착공법으로는 점보드릴을 이용한 발파공법을 가정하였으며, 기존연구에서 제시한 가로 세로 순차시공방식으로 검토하였다. 주방식 지하구조의 계획부지 크기에 따라 굴착공기와 장비운영 등을 고려하여 전체 굴착공정을 예상할 수 있었으며 막장운영 계획에 따라 운영가능한 장비수를 고려하여 전체 굴착공기를 예상할 수 있었다.

Keywords

References

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