conveying process. Finally, the future perspectives of mining with backfill are discussed based on the features of modern filling concepts to provide the necessary theoretical research value for filling mining. Keywords: mining with backfill; cementitious materials; mechanical characteristics; slurry properties; future perspectives 1. Introduction
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Minerals 2021, 11, 1274 2 of 19 methods in Chinese mines around 2010, focusing on the pressure control and related cal‐ culation of backfill resistance in the backfill mining method.
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Keywords: mine tailings; cemented paste backfill; alkali-activated slag; rheological properties 1. Introduction Mine backfill is often an integrated part of underground mining for several reasons ...
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Understanding the rheology behavior of non-Newtonian mine paste backfill is critical to ensure its flowability in the pipeline distribution system. Several rheology measurements methods for paste backfill have been …
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Mine backfill is a well-established and proven practice within the underground mining industry. The wide application of backfill technology in mining engineering helps to convert resource into reserve, reduce ore dilution, and improve underground working conditions. ... Rheological properties of mine backfill slurry Strength characteristics and ...
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Cemented backfill is increasingly applied in underground hard rock mines, providing effective ground support, promoting ore recovery rate, and handling tailings or solid waste (as aggregate) [[1], [2], [3]].Cemented high-density backfill (CHB) and cemented paste backfill (CPB) are two of the most commonly used backfill configurations [4, 5].Both CHB and CPB are …
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Pipeline transportation is the key component of the mine filling system. In this study, fresh cement tailing backfill (CTB) slurry made by unclassified tailings from the Daye iron mine is taken as the research object, and its rheological parameters and transport characteristics are studied via laboratory test and FLUENT software.
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Cemented paste backfill (CPB) made with mine tailings is an efficient method for void backfilling in underground mines. Therefore, this study investigated the eco-sustainable utilization of CKD as a co-binder material that can partially replace …
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Cemented Paste Backfill: Thickening, Transport and Mechanical Properties covers a wide range of topics, including a new definition of CPB, past participation and flow-induced corrosion of pipeline under the constant temperature condition, multiphysics processes in CPB and the associated consolidation process, the variation of rheological parameters and transport …
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The rheological behavior of full tailings in deep thickening, rheological behavior of paste in mixing and pipeline transportation, and rheological behavior of filling body are introduced and ...
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The development of industry is inseparable from the support of mining. However, mining processes consume a large amount of energy, and increased tailing emissions can have a significant impact on the environment. In the past few decades, the mining industry developed many technologies that are related to mineral energy management, of which cemented paste …
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afect the rheological properties of the product that is being pumped. Thanks to this solution, the client can count on an intelligent and reliable piece of equipment which treats - gently and …
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The rheological property is sensitive to the variation of backfill slurry concentration. The rheological and sedimentation properties of the backfill material are investigated by conducting a series of rheological tests. The effect of temperature on apparent viscosity, shear stress, yield stress, and pipeline transport of CPB are studied.
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Rheological properties, such as the yield stress, viscosity, and thixotropy, are related to the microstructure of cemented paste backfill (CPB). To highlight the relationship, two instruments were combined to measure the changes in the microstructure and the rheological properties of CPB simultaneously.
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2.1.1. Physical and Chemical Properties of Tailings . The tailings are taken from a gold mine in northeastern China, and its density is 2.69 g/cm 3 when measured by the density bottle method. The particle size composition of the tailings is shown in Figure 1 a, and the chemical composition is shown in Figure 1 b and Table 1.The medium particle size (d 50) of …
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This paper aims to study the effects of gypsum type and dosage on the rheological and strength properties of steel-slag cemented paste backfill (SSB-CPB) using fluorogypsum (FG), phosphogypsum (PG ...
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Literature studies the influence of 3 water reducing agents on the rheological property of the paste ... the mean particle size of PC32.5 cement used for Ashele Copper Mine backfill ... cleaning up the paste materials bonded on the equipment in time to enable the normal operation of the relevant equipment. The uniform paste backfill slurry is ...
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and sorted out the rheological model of paste from the macro and meso-level. The micromechanical action and structural evolution are the fundamental reasons for the rheological properties of paste. Xue et al. [3] reviewed the development process and characteristics of metal mine backfill mining in China at various stages, introduced the ...
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Researchers have realized significant breakthroughs based on the rheological mechanisms and operational properties of grouts. The limitations of time consumption and external obstacles,which ...
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The macroscopic flow behavior and rheological properties of cemented paste backfill (CPB) are highly impacted by the inherent structure of the paste matrix. In this study, the effects of shear-induced forces and proportioning parameters on the microstructure of fresh CPB were studied. The size evolution and distribution of floc/agglomerate/particles of paste were …
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CG used for backfilling and building materials accounts for the largest proportion. The coal gangue treatment has uncoordinated mining and filling, and the filling capacity cannot meet the demand for gangue processing capacity [13].Zhang et al. estimated that by 2030, the volume of goafs would reach 24.1 billion m 3 in China, and if the 15 % volume of these goafs …
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In this paper, we introduce the paste rheology theory system, which forms the theoretical backbone of cemented paste backfill. We delve into key technologies such as paste thickening, mixing, transportation, and the use of economical, low-carbon materials.
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The ultrafine-tailings cemented paste backfill (UCPB) exhibits special rheological characteristics in the high-temperature underground mining environment, which has an …
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The sublevel open stoping with backfill method has recently been widely used in underground metal mines. The primary CPB stope is frequently affected by blasting in the secondary ore stope ...
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2.1.1. Tested Tailings . Tested tailing materials were obtained from an iron mine located in the northeastern region of China. Mill tailings are main ingredients of cemented tailing backfill, and physical properties (e.g., bulk density, specific gravity, porosity, the specific surface area, and the particle size distribution) and the chemical composition play key roles in the …
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The Cemented Paste Backfill (CPB) yield stress is a key rheological parameter for paste filling technology, which has significant practical value for pipeline optimization and equipment selection ...
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This book investigates the rheology of paste in metal mines, which is beneficial for cemented paste backfill (CPB) technology. This book establishes a theory frame of paste rheology, including measurement of the rheological properties of paste, rheological behavior of full tailings in deep thickening, rheological behavior of paste in the mixing process, rheological …
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The goal of studying paste rheology is to solve the engineering problems existing in four key processes; that is, paste rheology should meet the engineering demands of …
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Especially after entering the 21st century, China has paid more attention to mining safety, environmental protection, and the continuous implementation of resources development, China's backfill mining method has …
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This Special Issue aims to highlight the crucial factors that affect the mechanical and rheological properties of cemented tailings backfill. Understanding these properties is essential for optimizing the design and performance of backfill systems, enhancing mine safety, and minimizing environmental impacts.
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پست الکترونیک: [email protected]
نشانی: شماره 1688، جاده شرقی گاوک، منطقه جدید پودونگ، شانگهای، چین.
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