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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.18 No.6
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A study on the excavation cycle by the drill-and-blast method for a room-and-pillar underground structure

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2016, v.18 no.6, pp.511-524
https://doi.org/10.9711/KTAJ.2016.18.6.511






& (2016). A study on the excavation cycle by the drill-and-blast method for a room-and-pillar underground structure. (사)한국터널지하공간학회, 18(6), 511-524, https://doi.org/10.9711/KTAJ.2016.18.6.511
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Abstract

Since a room-and-pillar underground structure is characterized by its grid-type array of room and pillar, its economical efficiency can be governed by excavation sequence. In this study, the construction period by the drill-and-blast method as a excavation method for a room-and-pillar underground structure was examined. In addition, the parallel excavation sequence was considered as the main sequence of a room-and-pillar underground structure. Sequences of mucking and support installation were derived to estimate the total excavation cycle by taking the case of a road tunnel into consideration. From the excavation cycle of room-and-pillar underground structure, the relationship between available maximum and minimum numbers of jumbo drill machines depending on the number of faces in operation was suggested.

keywords
주방식 공법, 발파굴착, 굴착, 공정, 공사기간, Room-and-pillar method, Drill-and-Blast, Excavation, Sequence, Construction period

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