コバルト・リッチ・マンガン鉱床の工学的特性評価に関する基礎的研究 [in Japanese] Fundamental Study for Estimation of Engineering Properties of Cobalt-Rich Manganese Deposits [in Japanese]
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Cobalt-Rich Manganese Deposits (CRMD) is one of underwater mineral resources which is cobalt supply. In order to mine this CRMD efficiently, it is important to understand such engineer properties of CRMD and their substrates, as P-wave velocity, specific gravity, strengths and so on. But these engineering properties have not been well known yet. Because the layer of CRMD is not thicker then 10 centimeter, it is difficult to examine ordinary strength tests such as compression test, tensile test and so on.In this paper, to suggest the way to estimate engineering properties, two hardnesses which are applied to metal materials and specific gravity, porosity and P-wave velocity are measured, and relationship between these two hardnesses and these three properties is examined. One of two hardnesses is Shore hardness test that is the one of dynamic hardness test and the other is Micro-Vickers hardness test that is the one of static hardness test. And more, to suggest the way of continuous estimation of engineering properties, reflection coefficient at the surface of CRMD and their substrates is measured, and relationship between hardnesses and their coefficient is examined. Consequently, the followings become clear.1) Micro-Vickers hardness of CRMD and their substrates has no connection with specific gravity, porosity and P-wave velocity. But Shore hardness is closely connected with these three engineering properties.2) Reflection coefficient of CRMD and their substrates is closely connected with Shore hardness, specific gravity and porosity. It is possible to estimate the engineering properties of CRMD and their substrates using the reflection coefficient.
- Journal of MMIJ
Journal of MMIJ 114(1), 7-12, 1998-01-25
The Mining and Materials Processing Institute of Japan