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首页> 外文会议>Annual Conference on Explosives and Blasting Technique vol.1; 20050206-09; Orlando,FL(US) >A Case Study of Full-Face Blasting in Highway Tunnel
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A Case Study of Full-Face Blasting in Highway Tunnel

机译：公路隧道全断面爆破实例研究

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The rock mass to be excavated is classified using data obtained from the initial site investigation, and the design of excavation and support is then made based on the rock class. Rock classification provides an empirical design with guidelines for tunnel support compatible with rock mass quality and the method of excavation. Although most clients provide standard patterns corresponding to each rock class, the patterns of drilling and blasting have only been used in estimating the excavation cost and not used in the construction stage. The purpose of the study presented in this paper is to establish a standard blast pattern to yield optimum blasting performance along with an attempt to reduce a difference between design and construction. A series of test blasts were carried out at two tunneling sites of Central Inland Highway crossing the country. Long hole blasting was tested in rock mass whose RMR value is over 60. The blasting results were evaluated by measuring degree of fragmentation, advance rate, muckpile distribution, overbreak, etc. Based on the results of test blast, several patterns were proposed for a two-lane highway tunnel.
机译：使用从初始现场调查获得的数据对要挖掘的岩体进行分类，然后根据岩石类别进行挖掘和支护的设计。岩石分类为经验设计提供了与岩体质量和开挖方法兼容的隧道支护指南。尽管大多数客户提供与每种岩石类别相对应的标准样式，但钻孔和爆破样式仅用于估算挖掘成本，而未在施工阶段使用。本文提出的研究目的是建立一种标准的爆破模式，以产生最佳的爆破性能，并尝试减少设计与施工之间的差异。在穿越该国的中部内陆公路的两个隧道工地进行了一系列的试验爆炸。在RMR值超过60的岩体中进行了长孔爆破测试。爆破结果通过测量碎裂程度，前进速度，堆屑分布，溢出等来评估。基于测试爆破的结果，提出了几种爆破方法。两车道公路隧道。

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