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Site Characterization of an Abandoned Gold Mine Using the Multi-Channel Analysis of the Surface Waves Method

机译：使用多通道分析表面波法的遗址表征废弃金矿

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Geophysical methods and tools are becoming more widely used in the geotechnical and engineering arena. The non-invasive nature and capability to survey significant areas in a rapid and cost-efficient manner typically make them an attractive complementary tool to conventional drilling and invasive investigations. The multi-channel analysis of surface waves (MASW) is one method that has seen growing application in the geotechnical world. We present a case study from an assessment of a historic gold mine site in Colorado. The site was extensively mined in the late 19th and early 20th centuries and left a legacy of collapsed shafts and shallow, typically poorly documented, mine workings. The objective of the survey was to investigate the upper 30 to 50 feet of the subsurface to characterize potential collapsed or backfilled mine workings in advance of the construction of a new mill pond. A total of 40 MASW profiles were collected, along several 1000 foot sections of the targeted mineral veins across the site. While there are numerous surface expressions of old or collapsed shafts across the site, there was limited additional subsurface information to ground truth the geophysics. A significant number of targets in the subsurface were identified in the MASW profiles. A hazards map of the site was produced highlighting potential weak zones or void space in the subsurface for the ensuing earthworks and construction activities.
机译：地球物理方法和工具在岩土和工程舞台上越广泛使用。以快速和成本效益的方式调查显着区域的非侵入性质和能力通常使其成为传统钻井和侵入性调查的有吸引力的互补工具。表面波（MasW）的多通道分析是一种方法，在岩土上看到了越来越多的应用。我们在科罗拉多州历史悠久的金矿网站提供了一个案例研究。该网站在19世纪后期和20世纪初的广泛开采，并留下了倒塌的轴和浅，通常记录，矿井的工作。该调查的目的是研究地下的30至50英尺，以表征潜在的折叠或回填的矿井运作在新磨坊池塘的建设之前。沿着本地靶向矿物静脉的几个1000英尺的几个距离收集了40个Masw型材。虽然网站上有许多旧的旧或倒塌的轴的表面表达，但是与地球物理地球物理学的地面真相有限地存在有限的额外地下信息。在MASW型材中识别出地面中的大量目标。该网站的危险地图在突出的潜在弱区或施工活动中突出显示潜在的弱区或空隙空间。

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