| 某公路瓦斯隧道综合勘察技术应用 |
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| 引用本文： | 王国斌,利奕年.某公路瓦斯隧道综合勘察技术应用[J].岩土力学,2011,32(4):1273-1277. |
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| 作者姓名： | 王国斌 利奕年 |
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| 作者单位： | 1. 湖北省交通规划设计院，武汉 430051；2. 中国地质大学（武汉） 工程学院，武汉 430074 |
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| 摘 要： | 瓦斯赋存位置的确定和瓦斯动态监测是瓦斯隧道勘察的两大关键问题。针对某公路隧道掘进过程中发现的瓦斯气体，采用地质调绘、施工地质预报（物探、地质超前钻探）、瓦斯监测等手段进行综合勘察，研究瓦斯储气构造，分析瓦斯成因，并对该隧道未开挖洞段的围岩瓦斯特征进行了预测预报，提出瓦斯风险段落。研究表明，虽然该隧道具有充分的瓦斯形成地质背景，但瓦斯赋存特点是分散型、浓度低、储量低；瓦斯通过单斜构造中的岩石裂隙、孔隙富集运移，分析认为，该地区不具备大量瓦斯生成的地质构造条件。综合勘察技术的应用有助于提高预报精度，为保证隧道施工安全提供了可靠的地质依据，对类似隧道工程建设具有一定的指导作用。
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| 关 键 词： | 隧道 瓦斯 施工地质预报 监测 |
| 收稿时间： | 2010-10-08 |
Application of comprehensive survey technique to gas tunnel of highway |
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| WANG Guo-bin,LI Yi-nian.Application of comprehensive survey technique to gas tunnel of highway[J].Rock and Soil Mechanics,2011,32(4):1273-1277. |
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| Authors: | WANG Guo-bin LI Yi-nian |
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| Institution: | 1. Hubei Communications Planning and Design Institute, Wuhan 430051, China; 2. Faculty of Engineering, China University of Geosciences, Wuhan 430074 China |
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| Abstract: | Locating of gas-bearing structure and dynamic monitoring are two key problems in methane tunnel exploration. As far as methane found in Jijiapo Tunnel in the Three Gorges Dam highway, using geological survey, geological prediction in construction (geophysical prospect and geological drilling), comprehensive gas monitoring and other means of investigation are adopted to analyze gas-bearing structure, study formation cause of gas, and predict gas feature of surrounding rock mass in front of the cutting face and determine dangerous position. It is concluded that gas in this tunnel is characterized by disperse, low density and small volume. The gas flows through fissures and pores in rock mass without tectonic condition for large gas-bearing structure. Comprehensive survey can help to improve predicting accuracy and provide reliable geological support, and can be of great guidance to construction of similar tunnel project. |
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| Keywords: | tunnel gas construction geological prediction monitoring |
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