Pressure Study on Pipe Transportation Associated with Cemented Coal Gangue Fly-Ash Backfill Slurry

Yang, Jie; Yang, Bo; Yu, Mingming

doi:10.3390/app9030512

Cited by 21 publications

(7 citation statements)

References 23 publications

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“…At the same speed, the S0 has the largest pressure loss, followed by S2, while S1 has the smallest pressure loss. This is because the pressure loss is mainly affected by pipe length, velocity, pipe diameter and plastic viscosity in horizontal pipeline [47]. When pipe length, pipe diameter and flow rate are constant, the pressure loss is mainly affected by plastic viscosity [48].…”

Section: Pressure Loss Of Cpb Slurry In Pipelinementioning

confidence: 99%

Pipeline Transportation Characteristics of Different Cementing Materials in CPB Slurry

Dong

Aziz

Shafri

et al. 2022

ARFMTS

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Research on the underground filling mining of Cemented Paste Backfilling (CPB) slurry shows that it alleviates the underground subsidence and environmental problems caused by mining, making a strong contribution to the realization of green mining. To optimize performance, cost reductions, and the recycling of agricultural solid waste, some researchers have studied using volcanic fly ash (FA) to replace part of cement. Corn straw fly ash (CSFA) may be used to replace the same amount of part of cement or FA, as corn straw can improve the mechanical properties of FA to make the CPB slurry for filling goaf. On this basis, in order to ensure a good flow of the CPB slurry in the pipeline, we need to conduct pipeline tests on the slurry of these different cement materials to verify their feasibility. In this article, Fluent has been used to study the CPB slurry transport properties in the two cases mentioned above through numerical simulation. Comparing the velocity distribution and pressure loss changes of the CPB slurry with different proportions in the horizontal pipeline provides a reference for future CPB slurry research. The results show that: (1) FA forms a lubricating layer in the pipe wall due to its "ball effect", which effectively reduces the yield stress and pressure loss of the CPB slurry in the pipe, and plays a positive role in the transportation of CPB in the pipe; and (2) CSFA increases the CPB slurry transport pressure loss due to its irregular particle size, increasing the risk of pipe wear. The results are helpful for better understanding and designing paste filling material for mine.

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Section: Pressure Loss Of Cpb Slurry In Pipelinementioning

confidence: 99%

Pipeline Transportation Characteristics of Different Cementing Materials in CPB Slurry

Dong

Aziz

Shafri

et al. 2022

ARFMTS

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“…Filling Material Ratio e performance of grouting filling materials is the key to the success of the separation grouting filling mining technology [24]. Based on the difference of filling materials, the common coal mine grouting and filling mining technologies can be divided into coal gangue backfill, grouting and filling technology, total tailings cementing and filling, waste rock construction waste cementing and filling technology, and high-water filling technology [25].…”

Section: Optimization Test Of Separation Groutingmentioning

confidence: 99%

A Pocket Assay Grouting Technology for Rock Burst Control under Huge-Thick Conglomerate

Shi

Meng

et al. 2020

Shock and Vibration

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As the carrier of force and energy, large-scale breaking or bending of huge-thick conglomerate tends to induce impact ground pressure in stope and tunnel. The stratum movement under huge-thick conglomerate was studied in this paper, which is mainly based on the key stratum theory for ground control. Based on this theory, the huge-thick conglomerate can be regarded as the main key stratum, and stratum movement or the development of grassroots state under huge-thick conglomerate will affect the structure itself, which may induce rock burst in stope and tunnel. The grouting technology is proved to effectively limit the bending settlement of conglomerate, control stress concentration of conglomerate, and improve the structure of the source of rock burst, which is an effective method for the control of huge-thick conglomerate. In this paper, the optimization of grouting filling material ratio is studied by the orthogonal experiments and the results show that the optimization of material ratio is cement: fly ash: gangue 1 : 2.22 : 4.44, concentration 75%. Under such conditions, pumpability and intensity reach the best. Meanwhile, a new technology, called pocket assay grouting technology, is put forward in this paper. It can prevent slurry leakage, protect the environment, and improve the efficiency of slip casting. The application of this technology in Huafeng mine shows that it not only realizes the safe, efficient, and green of coal mine but also provides technical support to control occurrence of rock burst induced by the movement of the huge-thick conglomerate in deep mining.

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“…However, relatively little attention has been paid to tracking the evolving trends and characteristics of coal slurry pipeline transportation technology based on objective data. Until now, most research concerning coal slurry pipeline transportation technology has focused on modeling (Das et al, 2020;Singh et al, 2020;Yin et al, 2021), method optimization (Singh et al, 2018;Yang et al, 2019;Singh et al, 2022), and literature review (Mishra et al, 2019;Nunes, 2020;Das et al, 2021). And the research methods are usually based on experiments, surveys, case studies or expert reviews.…”

Section: Introductionmentioning

confidence: 99%

Tracing the technological trajectory of coal slurry pipeline transportation technology: An HMM-based topic modeling approach

Wang

Li²,

Feng³

2022

Front. Energy Res.

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Coal slurry pipeline transportation is an important way to realize green coal logistics. However, there are still challenges in understanding the cognitive aspects of coal slurry pipeline transportation technology development trajectory. This study attempts to trace and predict the technology trend from patent texts through the stochastic process analysis of topic evolution. It helps understand the challenges in the development process of coal slurry pipeline transportation technology. And capture trends and development characteristics of the technology to improve research and development (R&D) efficiency and sustainability. As a result, this study extracts potential technology topics from patent text by using the Latent Dirichlet Distribution method. Then, a Word2vec-based topic word vector model is applied to calculate the cosine similarity between topics. And the HMM-based topic evolution trend model is constructed by introducing the Hidden Markov Model (HMM) which can portray a dual stochastic process. Finally, it is used to analyze and predict trends in the technological evolution of this field. It was found that the advancement of technology related to pulping is fundamental to promoting the development of coal slurry pipeline transportation technology, which is also a common research topic. Finally, technologies related to pipeline transportation capacity enhancement and the industrial application of coal slurry will be the focus of future R&D in this field with broad research and application prospects. This study is intended to provide directions for sustainable R&D activities in coal slurry pipeline transportation technology, facilitate interdisciplinary discussions, and provide objective data for future decisions making for scientists and R&D managers in this field.

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Pressure Study on Pipe Transportation Associated with Cemented Coal Gangue Fly-Ash Backfill Slurry

Cited by 21 publications

References 23 publications

Pipeline Transportation Characteristics of Different Cementing Materials in CPB Slurry

Pipeline Transportation Characteristics of Different Cementing Materials in CPB Slurry

A Pocket Assay Grouting Technology for Rock Burst Control under Huge-Thick Conglomerate

Tracing the technological trajectory of coal slurry pipeline transportation technology: An HMM-based topic modeling approach

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