论文部分内容阅读
在瓦斯隧道施工中,最经济最有效地控制瓦斯事故的技术手段,就是建立良好的通风系统。铁路隧道与煤炭部门的生产矿井不同,虽然巷道分部相对简单,但隧道断面大,施工方法复杂多变,如何计算瓦斯涌出量和主、局扇的供风量,如何确定最小风速和选择通风设备都必须根据具体情况进行分析研究。本文论述了南昆铁路家竹箐隧道的煤层特点和施工通风设计概况以及采用的通风系统,并详细介绍了隧道瓦斯容许浓度和最低风速的确定以及瓦斯涌出量、通风量和风压的计算方法。
In the gas tunnel construction, the most economical and most effective way to control gas accidents is to establish a good ventilation system. How to calculate the amount of gas emission and the amount of air supplied by main and branch fan, how to determine the minimum wind speed and select the ventilation, although the tunnel section is relatively simple, but the tunnel section is large and the construction method is complex and changeable Equipment must be analyzed according to the specific situation. This paper discusses the characteristics of coal seams and the ventilation design of the construction and the ventilation system used in the Zhunan tunnel of Nanning-Kunming Railway. The methods for determining the allowable concentration and minimum wind speed of tunnel gas, and the gas emission, ventilation and wind pressure are introduced in detail. .