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http://dx.doi.org/10.9711/KTAJ.2015.17.4.499

A preliminary study on the optimum excavation sequence of a room-and-pillar underground structure  

Lee, Chulho (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology)
Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology)
Hyun, Younghwan (ESCO Consultant & Engineers Co., Ltd.)
Hwang, Jedon (ESCO Consultant & Engineers Co., Ltd.)
Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.17, no.4, 2015 , pp. 499-511 More about this Journal
Abstract
A room-and-pillar underground structure is characterized by its grid-type array of galleries. As a result, its construction and economical efficiency can be governed by excavation sequence of galleries. Therefore, this study aims to study the optimum excavation scheme of a room-and-pillar underground structure by considering its various design factors such as ground conditions and excavation sequences. Drill-and-blast method is assumed as a excavation method for a room-and-pillar underground structure. In addition, two kinds of excavation patterns corresponding to a concurrent and a sequential excavation patterns are considered in this study. For the assumed conditions, the structural stability and the construction efficiency based on the number of faces and the travel distance of a jumbo drilling machine are analyzed for the two excavation patterns. Even though the two kinds of excavation patterns show almost the same structural stability as each other, the concurrent excavation pattern is relatively preferable to the sequential excavation pattern in terms of the number of faces in operation and travel distance of a drilling jumbo.
Keywords
Room-and-pillar method; Excavation; Sequence; Constructability; Stability;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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