摘要:研究目的:在煤与瓦斯突出危险地段进行隧道施工时，安全风险极高，其安全岩盘的设置方法业已成为 规避施工风险和提高施工工效的一大关键技术问题。而目前瓦斯突出工区防突安全岩盘的留置多依赖于经 验，存在较大的随意性，急需运用岩土理论并结合施工实践予以进一步研究和完善。 研究结论:( 1)本文借鉴类似工点的岩土理论分析、数值模拟研究成果，结合所收集的已有瓦斯突出隧道 的防突实践总结，选择瓦斯压力和工程地质条件作为代表性基础研究指标，提出了防突安全岩盘最小厚度的 简便计算办法;（2)利用多个典型工程实例，对比验证了计算方法的可行性；（3)该研究成果将对保障瓦斯隧 道突出危险区的施工安全和提高隧道施工进度发挥直接指导作用，可为瓦斯突出地段安全岩盘的科学设置 提供指导。

Abstract :Research purposes： Tunnel；ling in a potential gas outburst section exhibits high safety risk. The determination method of safe rock thickness has become a key technical issue to avoid construction risk and improve construction efficiency. At present，the determination of safe rock thickness mostly depends on experience with more randomness，so it should be further studied and improved combining geotechnical theory with construction practice. Research conclusions ：( 1) According to the theoretical geotechnical analysis，numerical simulation research for similar projects， and combining the gas outburst prevention practice in existing tunnels， a simple calculation method of minimum safe rock thickness for preventing gas outburst is proposed. The method is proposed by taking gas pressure and engineering geological conditions as the representative indexes. (2) By using several typical engineering examples，the feasibility of the calculation method is verified. (3 ) The research results will play a direct guiding role in ensuring the tunnel construction safety and improving the construction progress in potential gas outburst zones， which can provide important reference for scientific determining the safety rock thickness in potential gas outburst zones.