Abstract: There is great difficulty in the ventilation during tunneling at multiple faces of twintube tunnel accessed from one single inclined shaft. A new technology for ventilation through air channel formed by false ceiling is presented. The ventilation principle, layout mode, applicable conditions and key operation points of the mentioned ventilation technology are presented. The calculation and analysis of the ventilation technology is presented with emphasis. Rational calculation and analyzing method is proposed, which demonstrates that the mentioned ventilation technology has advantage in energysaving. The superiorities of the ventilation technology are summarized. The paper can provide technical reference for the design and optimization of ventilation technology in the future.

Key words: tunnel, ventilation during tunneling, air channel formed by false ceiling, inclined shaft