马家坡瓦斯隧道设计等级的判定研究  

Detection of Coal Seam Gas Content in Majiapo Tunnel and Gas Project Rating

作　　者：韩玉芳[1] 谢士宏[2] 杨龙 

机构地区：[1]石家庄铁道大学材料科学与工程学院,河北石家庄050043 [2]石家庄铁道大学四方学院,河北石家庄050043 [3]中铁五局集团路桥工程有限公司,广东广州511458

出　　处：《石家庄铁道大学学报（自然科学版）》2011年第4期74-77,共4页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：由于瓦斯在煤(岩)中的含量、压力的存在形式、涌出规律、煤层的赋存条件等很难在勘测设计阶段完全、准确掌握,因此在隧道施工中,若突遇高瓦斯隧道地段而不及时按照瓦斯隧道施工规范施工,爆炸伤亡事故便难以避免。对马家坡隧道ZK140+660～ZK141+100段施工过程中所检测的瓦斯含量数据进行了统计和分析,对掌子面出现煤层的位置取煤样测试了吨煤瓦斯含量,通过间接法测试了瓦斯压力,计算出了瓦斯绝对涌出量,具体参数如下:吨煤瓦斯含量值2.75 m3/t,瓦斯压力值0.18 MPa,瓦斯绝对涌出量2.06 m3/min,符合TB10120—2002《铁路瓦斯隧道技术规范》中隧道瓦斯工区等级划分标准中二级规定,据此瓦斯压力推算为由此判断该隧道无瓦斯突出危害,但是属于高瓦斯等级隧道。文中所涉及的方法及数据对今后各类瓦斯隧道的施工具有一定的参考价值。Because the content of the gas in the coal rocks, its form and the pressure, and foaming rules and seam occurrence condition are difficult to decide accurately and completely in the design phase, in the construc- tion of tunnels, if gas emission is encountered and measures are not taken timely according to the gas tunnel con- struetion specifications, explosion would not be avoided. Based on the technical specification for gas tunnel, the ranks of various parameters of Majiapo tunnel gas are tested, and the result shows that the gas volume per ton coal is 2.75 m3/t, the gas pressure is 0.18 MPa, and the absolute emission of gas is 2.06 m3/min. The conclusion is that this tunnel is not prone to have gas outburst, but belongs to the high gas levels tunnel. The data and methods in this article may have reference value in the construction of other tunnels in the future.

关 键 词：瓦斯隧道 瓦斯压力 绝对瓦斯涌出量 

分 类 号：TU94[建筑科学—建筑技术科学]