Research on the fluid characteristics of cemented backfill pipeline transportation of mineral processing tailings

Gao, Rugao; Zhou, Keping; Zhou, Yanlong; Yang, Chun

doi:10.1016/j.aej.2020.07.047

Cited by 31 publications

(9 citation statements)

References 57 publications

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“…Geodetic observations of subsidence or deformations of artificial structures of the underground are carried out in order to determine the degree of deformation and assess the stability of the structure, take timely measures, study the causes of deformations of the underground structures, check calculated data and develop a methodology for predicting them [16].…”

Section: Methodsmentioning

confidence: 99%

Justification of the method of soil densification of the interstation tunnel by jet injection based on computer modeling

Вапнічна

Коробійчук

Zuievska

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The article is devoted to a topical issue - the development of a method of densification of the base of the underground interstation tunnel to prevent further intensive subsidence of tunnel structures. Based on computer-mathematical modeling, the work establishes experimental dependence between the angle of inclination of jet grouting piles and the amount of subsidence of the distribution plate on which the tunnel structures rest upon. Inspection of the technical condition and analysis of defects in a comprehensive comparison with subsidence graphs allowed us to identify the main typical deformations during subsidence of a shallow tunnel built from blocks of a solid-section frame, namely their characteristic features, geometric parameters and placement points.

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Section: Methodsmentioning

confidence: 99%

Justification of the method of soil densification of the interstation tunnel by jet injection based on computer modeling

Вапнічна

Коробійчук

Zuievska

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The gangue slurry shows complex mechanical phenomena in the process of pipeline transportation. At present, there is no accurate method to describe the flow characteristics of slurry in the pipeline (Gao et al, 2020). To study the internal particle migration law during the pipeline transportation of gangue slurry, Ansys Fluent software is used to simulate the pipeline transportation of high-concentration gangue slurry, study the micro-velocity distribution law of gangue slurry during pipeline transportation, and analyze the solid particle settlement law, so as to reasonably design the transportation velocity and ensure the safe operation of the system.…”

Section: Numerical Simulation Analysis Of Slurry Pipeline Transportationmentioning

confidence: 99%

Research on key parameters of pipeline transportation of waste rock treatment in underground residual space

Zhu

Song

2023

Front. Earth Sci.

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As the key link of coal gangue slurry filling, slurry pipeline transportation is an important guarantee to realize the slurry mixing and safe transportation of gangue from solid powder. To realize the underground excavation gangue of the Huangling No. 2 coal mine without raising the ground, the slurry filling technology is proposed to transport the slurry made by gangue through the pipeline and fill it into the goaf. The phase composition and microstructure characteristics of underground excavation gangue in the Huangling No. 2 coal mine were analyzed by X-ray diffraction and an electron microscope scanning test, the slurry-forming properties of gangue powder with different particle sizes and gradations were studied, and the influence of gangue slurry concentration on its rheological properties was analyzed. The experimental results show that the gangue powder crushed using a cage crusher can be made into stable slurry when the particle grading size is the natural crushing gradation with the upper limit of particle size less than 3 mm. The viscosity of the slurry is positively correlated with the concentration. When the concentration is below 70%, the increase in viscosity is small, and when the concentration is above 70%, the increase in viscosity is significant. It is determined that the concentration of the Huangling No. 2 coal mine slurry is 70%. Based on the determination of slurry preparation parameters, the simulation analysis of slurry pipeline transportation was carried out, the influence of design velocity on the velocity distribution of the pipeline section and the variation law of slurry concentration was explored, and the design velocity of the project is determined to be 1.5 m/s. The engineering practice shows that the slurry preparation parameters are reasonable. The crushing and pulping of gangue under the ground and the safe transportation of a 6 km pipeline are realized, which provides a reference for similar engineering projects.

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“…To serve the production and construction of mines, backfill mining plays an increasingly important role. By turning the solid waste materials into high-concentrated paste tailing backfill materials, they can be recycled so as to effectively assist the ground pressure management of mining enterprises. − The double-shaft mixer is widely applied in mixing tailing backfill slurry and is developing rapidly. At present, in the mining industry, the application of mixing equipment is mostly based on empirical parameter methods, and there are few theoretical studies.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Multiphase Mixed Flow Field in Backfill Slurry Preparation Based on Multiphase Flow Interaction

Gao,

Wang,

Zhou

et al. 2023

ACS Omega

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The paper analyzes the dynamic behavior during the preparation of cemented backfill slurry by combining the structural performance analysis of the double-shaft mixer and the Euler multiphase flow field computational fluid dynamics model. Considering the interaction between phases and gas phase disturbances, the transient kinetic parameters and the interaction between gas and liquid phases were introduced. According to the modified lift model, the user-defined function of the net lateral lift coefficient and the turbulence energy equation was adjusted. Taking the parameters of flow field velocity, gas phase mixing, uniformity, and turbulent energy dissipation as the evaluation indexes of the mixing effect, the double-shaft mixer at a rotation velocity of 45 rpm and with a blade installation angle of 25°is the optimal design in this study. Experimental tests were carried out and confirmed that the refined two-fluid model of interphase interaction can provide a basis for the performance evaluation of material mixing equipment.

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Research on the fluid characteristics of cemented backfill pipeline transportation of mineral processing tailings

Cited by 31 publications

References 57 publications

Justification of the method of soil densification of the interstation tunnel by jet injection based on computer modeling

Justification of the method of soil densification of the interstation tunnel by jet injection based on computer modeling

Research on key parameters of pipeline transportation of waste rock treatment in underground residual space

Optimization of a Multiphase Mixed Flow Field in Backfill Slurry Preparation Based on Multiphase Flow Interaction

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