- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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Rock aggregates are vital for all construction projects. In northern Alberta, aggregates are especially important for oil sands mining operations, where they are used for base material under roads and building foundations, as composite materials for concrete, and in drainage applications (e.g., French drains). However, high quality rock and granular deposits, …
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Three‐dimensional, ground‐penetrating radar (georadar) techniques suitable for geological engineering applications have been developed and tested. Initial experiments were conducted on the floor of a quarry in southern Switzerland from which ornamental gneissic rock is extracted. During a brief two‐day period, constant‐offset georadar data …
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ABSTRACT Two- and three-dimensional rock-penetrating-radar data were acquired on the wall of a pillar in an underground limestone mine. The objective was to test the ability of radar to image fractures and karst voids and to characterize their geometry, aperture, and fluid content, with the goal of mitigating mining hazards. Strong radar reflections in the …
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Imaging the subsurface with geophysical methods and routing the quarry have been performed by the quarry management to prevent his losses in terms of time and cost. High-resolution images may be effectively obtained by ground-penetrating radar (GPR) and electrical resistivity tomography (ERT) methods. ... Travertine is a form of …
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Water seepage to ground surface at a limestone quarry located at Wadi Garawy about 20 km southeast of Helwan city in Egypt posed a real threat to the mining activity at the quarry. ... is known to be very dry for decades and away from water utilities and infrastructures that may cause water leaks to the quarry. Geophysical investigation ...
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Water seepage to ground surface at a limestone quarry located at Wadi Garawy about 20 km south-east of Helwan city in Egypt posed a real threat to the mining activity at the quarry. The quarry area is known to be very dry for decades and away from water utilities and infrastructures that may cause water leaks to the quarry. …
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ABSTRACT Electromagnetic signals from distant radio transmitters in the frequency range 15–250 kHz were measured to model an electrical resistivity structure beneath 7 profiles in the vicinity of the Karinu limestone quarry in Estonia with the aim to map the extent of the economically exploitable limestone. The resistivity models from a …
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Here, we show how a combination of electrical resistivity tomography (ERT) surveys, high-resolution seismic refraction surveys, and boreholes have been used to map limestone units and karst dissolution structures to depths of up to 100 metres (m) below ground surface (mbgs), at a limestone quarry expansion project in northern Alberta.
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Limestone quarry at Robben Island – dating back to mid-17th Century CC BY 2.0 Meraj Chhaya on flickr. Limestone is a relatively common sedimentary rock formed from remains of marine organisms such as coral or other invertebrates. Marble is limestone that has been recrystallized through metamorphism and in many applications are …
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Application of geoelectrical measurements for detecting the ground-water seepage in clay quarry at Helwan, southeastern Cairo, Egypt Footnote. Peer review under responsibility of National Research Institute of Astronomy and Geophysics.
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The objective of this study was to apply several methods of near-surface geophysical analysis to a stream loss problem near a limestone quarry, ultimately to distinguish between solution cavities containing air, sediment and water in order to best delineate groundwater flow paths.
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ABSTRACT After conducting a successful GPR pilot study in a tectonically complex area of the Karst Thrust Edge, a follow-up study was carried out. In the pilot study, the geometry and spatial extent of the Socerb thrust-fault, which separates limestone above from flysch below, were investigated using a 50 MHz antenna in the Črnotiče quarry. After one part …
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