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Blast Excavation of Small Diameter Tunnel near Underground pipe lines  

Won, Yeon-Ho (원앤비기술사사무소)
Kim, Kang-Gyu (한국전력공사 송변전건설처 전력구팀)
Publication Information
Explosives and Blasting / v.28, no.1, 2010 , pp. 40-54 More about this Journal
Abstract
The messer shield method applys mainly to a tunnel with small cross-section of a weathered soil or weathered rock district and is fulfilled mostly by man-power excavation. but in case that hard rock exposes on tunnel face, incredible is an application of the rock-splitting method using a hydraulic power or a blasting method. This study represents the case of a blasting method which can control to be practiced by the minimum charges of 125 g an initial vibration occurring at the cut instead of the rock-splitting method, even though water pipe and gas pipe are closely adjacent.
Keywords
Messer shield method; Rock-splitting method; Vibration-controlled blasting method;
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