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TUNNELING SYSTEMS FITTED WITH DUPLEX-IMPACT OPERATING MEMBER FOR THE SHORT RELIEVING TUNNELDRIVING WITH TUBBING LINING

Abstract

The article considers tunnel boring machinery options for mechanization of ancillary workings on loamy soils in the construction of underground networks and reports the following: -The results of experimental trials for distribution of the impact energy in the Cambrian clay soils, on the bases of which we developed the proposed construction; -The layout scheme and the operation principle of the impact operating member; -The graph construction of the tunnelling system’s theoretical productivity, equipped with impact operating member that works in the oncoming shear mode, depending on the average value of the mine face hardness, including the presence of solid bed layers; -The ratio of the tunnelling system’s theoretical performance with a new transport scheme proposed for the mines of the St. Petersburg Metro constructiong.

D. A. YUNGMEYSTER AND A. I. ISAEV

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