Abstract:

Due to the special construction difficulties of Qingshan tunnel, such as construction at multiple working faces, gas emission and coalexposing construction, there are high requirements for the construction ventilation of the tunnel. During the construction of Qingshan tunnel, jet ventilation technology is applied and new jet ventilation mode is formed, which effectively meet the requirements of simultaneous construction at five different working faces and trackless transportation system adopted in the tunnel construction. Jet ventilation technology has great advantages over traditional gallery ventilation technology.