آخرین محصولات
Backfilling Materials for Underground Mining, …
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 …
Rheological and Strength Properties of Steel-Slag …
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 ...
A Particle Size Distribution Model for Tailings in Mine Backfill
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 ...
Rheological Properties of Cemented Tailing Backfill and the
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 …
Mining with backfill: predicting backfill strength …
cemented rockfill and paste backfill strength. Keywords: cemented mine backfill, required strength, critical solids mass concentration, compressive strength, rheological parameters, self-weight consolidation 1 Introduction Underground backfilling contributes to the profitability of mining while ensuring maximum safety for mine workers.
Rheological behavior of ultrafine-tailings cemented paste …
The ultrafine-tailings cemented paste backfill (UCPB) exhibits special rheological characteristics in the high-temperature underground mining environment, which has an …
Progress and prospects of mining with backfill in metal mines …
Mining is the foundation of modern industrial development. In the context of the "carbon peaking and carbon neutrality" era, countries have put forward the development strategy of "adhering to the harmonious coexistence of humans and nature." The ongoing progress and improvement of filling mining technology have provided significant advantages, such as "green …
Advances in Underground Mine Backfill: Advances in Civil …
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 …
Experimental Study and Application of Rheological …
the rheological parameters of such fluids. We developed a rheometer for high-concentration coal gangue backfill slurry (HCGS rheometer) based on the coal gangue-fly ash backfill practice of Gonggeying Mine, and analyzed the rheological properties of the backfill slurry. The experimental results showed that the Reynolds number of the coal gangue ...
Sulfate-induced changes in rheological properties of fibre …
Cemented backfill used in deep mines would inevitably be exposed to the ambient temperature of 20–60 °C in the next few decades. ... The rheological properties of cementitious suspension are ...
Research progress of solid waste resource utilization backfill mining
Keywords: Jinchuan Nickel Mine, backfill mining, solid waste utilization, research progress, high-sulfur tailings. Citation: Hui C, Aiai W, Lianku X, Xi-Zhi Z, Yong-Ding W and Qian G (2024) Research progress of solid waste resource utilization backfill mining for Jinchuan Nickel Mine, China. Front. Mater. 11:1442564. doi: 10.3389/fmats.2024.1442564
Fluidity and rheological properties with time-dependence …
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 …
Rheological Properties of Cemented Paste Backfill and the …
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 ...
Systematic review of mixing technology for recycling …
struction of mines has become an important issue for the mining industry. Cemented paste backfill (CPB) technology has been widely adopted in China to minimize severe environmental damage and safety problems faced by China's mining devel-opment. In this manner, green metal mining becomes pos-sible. CPB is a paste prepared by mixing solid mine ...
Analytical and experimental investigation of the relationship …
Rheological test has been used to test flow characteristics, such as yield stress and dynamic viscosity, of mine backfill materials [19], [20]. However, rheological test requires specialized test setup and equipment, which is not practical in the field. These leads to difficulties to determine rheological properties in the mine site.
Systematic review of mixing technology for recycling waste …
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 ...
Particle aggregation and breakage kinetics in cemented paste backfill
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 …
A Particle Size Distribution Model for Tailings in Mine …
Abstract: With the increasing awareness of sustainable mining, the cement tailings backfill (CTB) method has been developed rapidly over the past decades. In the CTB technique, the two main mechanical properties engineers were concerned with are the rheological properties of CTB slurry and the resulting CTB strength after curing.
The Recent Progress China Has Made in the Backfill …
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.
Rheological behavior of paste in metal mines | International …
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 …
Backfill Systems
HYDRAULIC MODEL AND FLOW ASSESSMENT. A hydraulic gradient model, which can be used to compute the hydraulic gradient of paste backfill transported by a pipeline system in a …
Properties of Gobi Aggregate and Sulfide‐Rich Tailings …
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 ...
Evaluation of Rheology Measurements Techniques …
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 …
Cemented Paste Backfill
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 …
Advances in Underground Mine Backfill: Advances in Civil …
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 ...
Cemented Paste Backfill
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.
Using Coupled Rheometer‐FBRM to Study Rheological Properties …
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.
Development of Cemented Paste Backfill with Superfine …
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 …
Enhancing performance and structural integrity of cemented …
The law of sand-cement ratio, mass concentration, steel slag content and straw fiber on strength and rheological parameters of backfill was analyzed by orthogonal test method, …
Backfilling Materials for Underground Mining, …
Tailings from gold mines gradually approach ultra-fine, making mine backfill costs higher and strength lower, which poses a serious threat to the safety of underground personnel and equipment. It is well known that suitable …
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