摘要
瓦斯是隧道施工地质灾害之一,非煤系地层瓦斯涌(突)出相比煤系地层瓦斯涌(突)出具有随机性、分布不均匀等特点,因此该类瓦斯隧道的瓦斯灾害危害性更大。文章以鹧鸪山隧道为依托,在对隧道工程地质条件分析、瓦斯等级测定和压力测试的基础上,系统阐述了非煤系地层隧道瓦斯的形成原因、涌(突)出机制,并提出了瓦斯异常涌(突)出的危险性预判判据,对非煤系地层瓦斯隧道的研究、设计和施工具有一定的指导意义。
As one of the geological disasters in tunnel construction, gas bursts in non-coal measure strata are char-acterized by randomness and uneven distribution when compared to those that occur in coal strata, making thesekinds of gas tunnels more dangerous. Based on the practical case of the Zhegushan tunnel, this paper describes thecauses and bursting mechanism of the gas in non-coal strata tunnels in detail based on the analysis of geologicalconditions, gas level determinations and pressure testing, and gives a prediction criterion for the risk of gas bursts,which can play a guiding role for the research, design and construction of tunnels in non-coal measure strata.
出处
《现代隧道技术》
EI
CSCD
北大核心
2016年第3期146-150,共5页
Modern Tunnelling Technology
关键词
非煤系地层
隧道
瓦斯涌出
突出
机制分析
危险性预判
Non-coal measure strata
Tunnel
Gas gushing
Gas bursting
Mechanism analysis
Risk prediction
