Seismic characterization of the Grängesberg iron deposit and its mining-induced structures, central Sweden
Seismic characterization of the Grängesberg iron deposit and its mining-induced structures, central Sweden
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DOI：
10.1190/int-2014-0212.1
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
J. Place;A. Malehmir;K. Högdahl;C. Juhlin;K. Nilsson
中科院分区：
文献类型：
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作者：
J. Place;A. Malehmir;K. Högdahl;C. Juhlin;K. Nilsson
摘要我们对瑞典中部 Grangesberg 的磷灰石铁矿床进行了反射地震调查。 1989 年关闭时，该矿采用分段崩落法开采，深度约为 650 米。这种采矿技术导致沉降并产生断层网络，从深处的挖掘区域一直延伸到地表。 Grangesberg 矿床是瑞典中部最大的氧化铁矿化体，计划在未来几年再次开采。因此，必须更好地了解矿石几何形状和断层网络。为了解决这些问题，进行了由两条总长3.5公里的地震测线组成的勘察。这些剖面与 Grangesberg 矿床和露天矿以及该地区存在的主要采矿诱发断裂带相交。安装在液压卡车上的落锤源用于生成地震信号；有线和无线接收器用于...
AbstractWe have conducted a reflection seismic investigation over the apatite-iron deposit at Grangesberg in central Sweden. At the time of closure in 1989, the mine was operated using the sublevel caving method down to approximately a 650-m depth. This mining technique caused subsidence and generated a network of faults that propagated from excavated zones at depth up to the surface. The Grangesberg deposit is the largest iron oxide mineralization in central Sweden and is planned to be mined again in the coming years. It is therefore imperative to have a better understanding of the ore geometry and the fault network. A reconnaissance survey consisting of two seismic lines with a total length of 3.5 km was carried out to address these issues. The profiles intersect the Grangesberg deposit and open pit, as well as the major mining-induced fracture zone present in this area. A drop-hammer source mounted on a hydraulic truck was used to generate seismic signals; cabled and wireless receivers were used for th...