Vo Trong Hung, Nguyen Van Quyen. Perfecting technology spraying concrete in tunneling. Proceeding of the International Conference “Advances in mining and underground construction”. Hanoi. 5-2008. Page 241-250.

Perfecting technology spraying concrete in tunneling

Prof.PhD. Vo Trong Hung, PhD. Nguyen Van Quyen,
Hanoi University of Mining and Geology

Abstract: Report introduces some study results of method perfecting technology spraying concrete in tunneling. Basing on the law of change of sprayed material stream in space, authors had defined its trajectory and determined geometry technological parameters to control ejecting nozzle. This method can decrease a fallen material quantity in ejecting concrete in tunneling.

Key words: ejecting nozzle; sprayed concrete; fallen material quantity.

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Tuyển tập "Hội nghị 45 năm thành lập Bộ môn Xây dựng Công trình ngầm và Mỏ"

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SOME RESULTS OF CORRECTING GEOMETRY PARAMETERS FOR V-CUT AND FAN CUT HOLES IN TUNNELING

Prof.PhD. Vo Trong Hung
Hanoi University of Mining and Geology

Abstract: Report introduces some study results of method determining concrete parameters for V-Cut and Fan Cut holes in tunneling. The main geometry parameters for V-Cut and Fan Cut holes had corrected by using this method.

Key words: blasting holes; V-Cut holes; Fan Cut holes; geometry parameters.

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