FIELD: mining.
SUBSTANCE: actuator of a tunnel shield with oval shape comprises a central rotor tool, two horizontal side tools and two vertical drum tools. The actuator is telescopically connected to a shield shell along centres of rotation of side and vertical tools, and also via a square opening in a tight partition along the centre of gravity with oval section and a square guide passing through it.
EFFECT: invention provides for correction of shield shell position and position of tunnel section as direction of tools rotation changes.
5 dwg
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