隧道瓦斯涌出量预测方法在非煤地层中的应用研究

非煤地层瓦斯涌出量的评估目前还没有系统的理论和方法。通过应用《铁路瓦斯隧道技术规范》(TB10120—2002)和《铁路工程不良地质勘察规程》(TB10027—2012)中煤层瓦斯涌出量计算公式,结合现场瓦斯测试及浓度监测,认为若相关参数取值合理,公式应用于非煤地层是可行的,且规范计算结果更符合客观实际;同时,现场瓦斯浓度检测也是必要的。

Application Research of Prediction Method of Tunnel Gas Emission Quantity in Non-coal Stratum

At present,no systematic theory and method can be used for evaluating the gas emission quantity in non-coal stratum. Therefore,in this study,the gas emission quantity calculation formulas in coal seam were employed, which are stipulated in Technical Code for Railway Tunnel with Gas( TB10120—2002) and Code for Unfavorable Geological Condition Investigation of Railway Engineering( TB10027—2012),combined with field test and gas concentration monitoring. The research conclusion can be drawn as follows: for non-coal stratum,the use of above-mentioned formulas will be feasible if the relevant parameters are reasonably selected; the calculation result obtained from Technical Code for Railway Tunnel with Gas are even more in accordance with the objective reality; at the same time,it is necessary to test the gas concentration in field.