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在研究国内多条瓦斯隧道施工经验的基础上,总结瓦斯隧道施工中地质灾害防治的要点。针对某大断面瓦斯突出隧道的地质特点和施工难点,详细阐述在高瓦斯压力、围岩破碎和大跨度等诸多不利条件下,隧道施工的各个环节所采取的瓦斯防治工程对策。在瓦斯防治各项措施选取中,要本着“对症下药、有机组合”的原则,区分隧道特点,有所侧重,才能在保证施工安全的前提下取得最大的经济效益。
On the basis of studying the construction experience of many domestic gas tunnels, the key points of geological disaster prevention and control in gas tunnel construction are summarized. Aiming at the geological characteristics and construction difficulties of a large section gas outburst tunnel, the gas prevention and control engineering measures adopted in all aspects of tunnel construction under the adverse conditions of high gas pressure, broken rock and long span of surrounding rock are described in detail. In the selection of various measures for gas prevention and control, the principle of “prescribing the right remedy and organic combination” should be adopted to distinguish the characteristics of the tunnel and focus on it so that the greatest economic benefits can be obtained under the premise of ensuring construction safety.