Ventilation method for tunnel transverse hole construction in high altitude area

• Main Authors: CHU JUQIU, ZHANG RUI, FANG XIANG, ZHANG WEI, HE CANCAN, CHEN WENYIN
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention provides a high-altitude area tunnel transverse hole construction ventilation method which comprises the following steps that S1, transverse hole construction is conducted on one side of a double-track tunnel, and a first draught fan is installed at a hole opening of a transverse hole; s2, main tunnel construction is carried out after transverse tunnel construction is completed, S3, the working face geology is monitored in the main tunnel construction process, and jet fans are arranged at the intersection of the transverse tunnel and the main tunnel, a main tunnel body and a main tunnel inlet and outlet correspondingly for auxiliary ventilation after the working face enters a geothermal section; and S4, along with advancing of the main tunnel working face, a cooling device is additionally arranged on the construction working face. The ventilation scheme is optimized in a segmented mode according to the construction progress, a fan is adopted for ventilation in the transverse tunnel construction