The Mechanism of Imported Iron Ore Price in China

Fu, Zhijie

doi:10.4236/me.2018.911120

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…predicted the monthly price of iron ore in 2014 -2015 by using exponential smoothing and combining three supply-demand conditions. In 2018, Fu Zhijie [3] analyzes the relationship and the issues between iron ore market from demand and supply side. He empirically explains how and why the import iron ore price in China fluctuates through Baltic Dry Index, Dollar Index, iron ore production and volume of import iron ore, and also proves that Vector Error Corrected Model (VECM) outperforms ARIMA model in forecast ability assessment.…”

Section: Related Workmentioning

confidence: 99%

Prediction of Spot Price of Iron Ore Based on PSR-WA-LSSVM Combined Model

Cai¹,

2022

CIT. J. comput. inf. technol

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Aiming at the problems that the existing single time series models are not accurate and robust enough when it comes to forecasting the iron ore prices and the parameters of the traditional LSSVM model are difficult to determine, we propose a combined model based on Phase Space Reconstruction (PSR), wavelet transform and LSSVM (PSR-WA-LSSVM) to tackle these issues. ARIMA model, LSTM model, PSR-LSSVM model, and PSR-WA-LSSVM models were used for contrast simulation to forecast the spot price data of 61.5%PB powder from January 30, 2019, to February 1, 2021, in Ningbo Zhoushan port. The experimental results show that the PSR-WA-LSSVM combination model achieves better prediction results. At the same time, the model has a good performance in the multistep prediction of the iron ore price.

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Section: Related Workmentioning

confidence: 99%

Prediction of Spot Price of Iron Ore Based on PSR-WA-LSSVM Combined Model

Cai¹,

2022

CIT. J. comput. inf. technol

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“…The market price for iron ore is set by the iron content in it, and by the successful export and, thus, profitability. Thus, it is necessary to maintain quality characteristics in order to avoid losing competitiveness of the iron ore in the market (Fu, 2018).…”

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confidence: 99%

Peculiarities of the underground mining of high-grade iron ores in anomalous geological conditions

Petlovanyi¹,

Ruskykh²

2019

Journ. Geol., Geogr., and Geoec..

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This paper is dedicated to research into the geological peculiarities, shape of the ore body and the occurrence of the host rocks in the hanging wall of the Pivdenno-Biloz- erske deposit , as well as their influence on the degrees and quality of high-grade iron ore extraction. It is noted that in the interval of 480 – 840 m depths, a decrease is observed in the stability of the natural and technogenic massif, which is caused by the increase in rock pressure with depth, the influence of blast- ing operations on the massif and the difference in geological conditions. This has led to the collapse of hanging wall rocks and backfill into the mined-out space of chambers in certain areas of the deposit, the dilution of the ore and deterioration of the operational state of the underground mine workings. Attention is focused on the causes and peculiarities of consequences of the collapse of the hanging wall rocks during ore mining, which reduce the technical and-economic indexes of the ore extraction from the chambers. A 3D-model of an ore deposit with complex structural framework has been developed, which makes it possible to visually observe in axonometric projection the geological peculiarities and the shape of the ore body. The parameters have been studied of mining chambers in the 640 – 740 m floor under different changing geological conditions of the ore deposit and hanging wall rocks occurrence – the northern, central and southern parts. The difference in the iron content in the mined ore relative to the initial iron content in the massif has been defined as an indicative criterion of the influence of changing conditions on the production quality. The reasons have been revealed which contribute to the collapse of the rocks and the subsequent decrease in the iron content of the mined ore in ore deposit areas dif- fering by their characteristics. It has been determined that within the central and half of the southern ore deposit parts with a length of 600 m, an anomalous geological zone is formed, the manifestation of which will be increased with the depth of mining. It was noted that within this zone, with the highest intensity and density of collapse of hanging wall rocks, the influence of decrease in the slope angle and change in the strike direction are of greatest priority, and such geological factors as a decrease in hardness, rock morphology, deposit thickness increase this influence significantly. To solve the problems of the hanging wall rocks’ stability, it is recommended to study the nature and direction of action of gravity forces on the stope chambers in the northern, central and southern parts, as well to search for scientific solutions in regard to changes in the geometric shapes of stope chambers and their spatial location, improving the order of reserves mining in terms of the ore deposit area, the rational order of breaking-out ore reserves in the chambers with changing mining and geological conditions of the fields’ development.

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Dependence of the mined ores quality on the geological structure and properties of the hanging wall rocks

et al. 2020

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Paper presents the research results of the relationship revealed between the mined ore dilution factors and the geological structure and properties of the hanging wall rocks. The research methodology is in the analysis of the structure and properties of the hanging wall rocks, the technological parameters of the stopes in contact with the host rocks, the processing of actual surveying data of the rockfall volumes and dilution factors, the construction of a 3D model of the mined floor with the stopes divided according to the sequence of mining. The peculiarities have been revealed of changing the geological structure along the strike of the ore deposit with a characteristic distinguished tendency to decreasing the hardness of hanging wall rocks, the angle of the ore deposit slope, increasing the deposit thickness and replacing the morphological composition of the rocks with the division into 3 characteristic differing areas. New patterns and empirical equations have been determined for changing the ore dilution value in the primary stopes depending on the type, hardness coefficient and the contact area of the hanging wall rocks with the inclined outcropping of the stopes. A multiple regression equation has been obtained of the relation between the primary stopes dilution with the rocks hardness within f = 11 – 15 and the contact area of the stopes with rocks 780 – 2010 m2. The regression model variability of 85.96% evidences its reliability and representativeness. The methodological approach proposed in the paper can be used to develop an improved methodology for predicting the mined ores dilution when mining the Pivdenno-Bilozirske field, supplemented by a more complete data set to increase reliability.

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The Mechanism of Imported Iron Ore Price in China

Cited by 5 publications

References 14 publications

Prediction of Spot Price of Iron Ore Based on PSR-WA-LSSVM Combined Model

Prediction of Spot Price of Iron Ore Based on PSR-WA-LSSVM Combined Model

Peculiarities of the underground mining of high-grade iron ores in anomalous geological conditions

Dependence of the mined ores quality on the geological structure and properties of the hanging wall rocks

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