Forthcoming and Online First Articles

International Journal of Mining and Mineral Engineering

International Journal of Mining and Mineral Engineering (IJMME)

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International Journal of Mining and Mineral Engineering (6 papers in press)

Regular Issues

  • Development of integrated roof monitoring system and continuous miner working index for improving mine safety   Order a copy of this article
    by Banda Srikanth, Hemant Kumar, Srinivasulu Tadisetty 
    Abstract: Roof falls are the major catastrophes that occur in the underground coal mines and these falls have a serious impact on workmen in terms of injuries, fatality, and interruptions of production. Hence continuous monitoring of roof convergence is important to predict roof fall. A suitable monitoring system for roof convergence may be installed in underground mines to mitigate problems associated with roof falls. This paper explains the development of a new real-time integrated roof monitoring system based on an ultrasonic distance measurement sensor that has been deployed in the continuous miner workings for the measurement of roof convergence. The roof convergence data is processed to develop the continuous miner working index (CMWI) using statistical techniques and CMWI is very useful for predicting roof convergence in continuous miner workings to improve the safety of operations.
    Keywords: Roof fall; roof convergence; ultrasonic based monitoring system; mine index; and continuous miner working index.

  • How do operators and environment conditions influence the productivity of a large mining excavator?   Order a copy of this article
    by Samuel Bettens, Paul Siegrist, Ross McAree 
    Abstract: This paper considers the sources of variation in the operation of hydraulic mining excavators to shed light on the benefit of tighter control of the excavation process. An observational study is conducted, collecting operational data from a Liebherr R996 mining shovel for a number of equipment operators and environments. The methodology assesses the significance of the operator, material diggability, and bench height on variation in productivity. The paper finds that these three factors are important, with operator variation identified as the dominant factor. There is evidence that skilled operators may marginalize the influence of variation in environment conditions on productivity. The papers contribution is the quantification of the influence of bench height, digging conditions and the operator on productivity. The significance is that the findings give clarity to the prospective benefit that the automation of excavators would achieve.
    Keywords: mining excavators; hydraulic shovels; mining shovels; productivity study; production rate; operators; human factors; bench height; diggability; excavation environment conditions; sources of variation; automation; precision mining.

  • Economic Evaluation of Materials Handling Systems in a Deep Open Pit Mine   Order a copy of this article
    by Kesegofetse Bumo-Motswaiso, Raymond Sogna Suglo 
    Abstract: Materials handling constitutes a large portion of the costs of mining operations. Therefore, the system chosen must be cost-effective yet meet the production demands of the mine. In this paper, unit haulage costs, economic, risk and sensitivity analyses were conducted to determine the optimal way of handling materials in a deep open pit mine between the traditional Truck-Shovel Haulage System (TSHS) and In-pit Crushing and Conveying (IPCC) haulage system. The results show that the IPCC haulage system has lower unit costs than the TSHS. The NPV of IPCC system is US$ 15.09
    Keywords: Materials handling; In-pit crushing; Shovel-truck system; Economic analysis; Risk and sensitivity analyses.

  • An attempt to safe utilization of dangerous sediments deriving from mine water: a case study from the Polish part of the Upper Silesian Basin   Order a copy of this article
    by Boguslaw Michalik, Hubert Makula, Zbigniew Bzowski 
    Abstract: The removal of formation waters from coal mines in the Upper Silesian Basin is the source of sediments. Due to high content of radium, the sediments are classified as NORM (Naturally Occurring Radioactive Materials) and require special treatment according to the current EU and IAEA recommendations. On the other hand, the sediments contain potentially marketable materials and elements when separated. With this in mind, the radiometric, mineralogical, and physicochemical studies were conducted to characterize the sediments from the perspective of possible reprocessing. In the sediments high content of baryte was found, which is an interesting feature, since baryte is included in the list of critical raw materials (CRMs) crucial to the European economy. As a mineral, baryte can precipitate from underground waters or originate from gangues and it frequently contains radium. The research provides valuable information concerning the concentration and the forms of baryte present in the examined sediments. In particular the concentration of radium as well as the purification process of the remaining sediments with potential applications in construction is discussed.
    Keywords: mine water; sediments; NORM; minerals; baryte; radium; recovery.

  • Measurement of the Phosphorite Ore Pulp Density Based on the Image Recognition Method   Order a copy of this article
    by Xianhai Li, Han Li, Jiying Zhang, Fan Zhou, Aoao Chen 
    Abstract: In this paper, the image recognition method was applied to determine the phosphorite ore pulp density in the field of mineral processing engineering. The self-designed image recognition method-based ore pulp density measurement system was used to measure the density of phosphate ore pulp and conduct the feasibility analysis. The test results indicate that the grey value of phosphate ore pulp with different densities matched well with the pulp value. The test error of the ore pulp density of phosphate ore was 0.72-1.23%, which could basically satisfy the requirements of industrial application with little discreteness, high accuracy and high precision. This study proves that it was feasible to measure phosphate ore pulp density by using an image recognition method and provides a new idea for ore pulp density measurement and some thoughts for the application of image recognition in mineral processing engineering.
    Keywords: image recognition; phosphorite ore; characteristic color; exponential approximation curve; ore pulp density.

  • Ferronickel slag produced in New Caledonia: characterization and carbonation in seawater   Order a copy of this article
    by Jordan Prevot, Arnaud Serres, Peggy Gunkel-Grillon, René Sabot, Marc Jeannin 
    Abstract: Ferronickel slags (FNS) have been studied for a potential use of this industrial waste in seawater through mineral carbonation. Leaching tests have been performed using seawater and EDTA, a strong chelating agent. In both case, only small concentrations (in the range of
    Keywords: ferronickel slags; mineral carbonation; waste valorization; metals leaching; CO2 sequestration.