大茶山高瓦斯隧道施工通风设计

Design on construction ventilation for Dachashan tunnel with high concentration of gas

新建沪昆客运专线铁路大茶山高瓦斯隧道斜井及正洞施工采用钻爆法,采用了压入式、抽出式及全负压巷道式相结合的分阶段通风方案。依据通风标准,对作业面施工需风量、风压、风机供风量进行了计算,并提出通风设备参数要求。所采用的通风方案通风量大,稀释快,排烟时间短,充分满足了稀释瓦斯和排除烟尘的要求。隧道开挖作业环境好,极大提高了工作效率,保证了隧道的施工质量、进度和施工安全。

The incluned shafts and main tunnel of Dachashan high gas tunnel on the currently ander- construction Shanghai-Kunming passenger-dedicated railway has adopted drilling-and-blasting method in it construction, during which a total of three ventilation schemes, namely forced ventilation, exhaust ventilation and all-negative gallery ventilation, have been introduced supplementarily and successively. The air volume in need, air pressure, air volume supplied by the blower on the operation face have been measured and calculated in accordance with the ventilation standard and the equipement parameters have proposed accordingly. The scheme applied features ample air supply,which satifies the needs of diluting gas and discharging smoke. Its high efficiency creates a favourable construction environment, which largely accelerate the working pace. As a result,it ensures both the project quality and its safety.