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Experimental study of the hydromechanical response and liquefaction susceptibility of nickel ore to maritime transportation

Abstract : When transported in ship carriers nickel ore with excessive humidity may exceed its flow moisture point and liquefy under the effect of cyclic ship motion induced by the swell. Liquefaction of solid bulk means that the material loses all internal strength and behaves as a liquid. Once the phenomenon happens in one or several holds, the vessel is potentially unstable and may capsize very fast. The Flow Moisture Point, and then the Transport Moisture Limit, depend on several physical properties of the bulk mineral ore, among which its moisture content, of course, but also the amount of cyclic shear stresses exerting in the mass of ore during its maritime transportation. With the purpose to ascertain this key parameter so-called Cyclic Shear Ratio (CSR) to be considered when calibrating TML tests from triaxial tests in laboratory, a handysize bulk carrier was instrumented inside its nickel ore cargo with a multi-parameter monitoring system aiming to sample dynamic stresses versus ship motion and sea conditions. The authors detail here below this unique experiment based on two sea passages from New Caledonia to Japan and the principal observations and results obtained.
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https://hal-ineris.archives-ouvertes.fr/ineris-03239685
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Submitted on : Thursday, May 27, 2021 - 3:54:13 PM
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  • HAL Id : ineris-03239685, version 1

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Pascal Bigarre, Jean-Bernard Kazmierczak, S. Collignon. Experimental study of the hydromechanical response and liquefaction susceptibility of nickel ore to maritime transportation. 10. Asian Rock Mechanics Symposium (ARMS 10) - ISRM International Symposium for 2018, Oct 2018, Singapore, Singapore. ⟨ineris-03239685⟩

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