Recent Patents on Gangue Pneumatic Filling for Coal Auger Mining Method

Yang, Dong‐Yeol; Li, Jianping; Bang-sheng, Xing; Wang, Yanxiang

doi:10.2174/2212797611666180118094926

Cited by 9 publications

(4 citation statements)

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“…As the main producing area of coal in China, the western region bears the important task of independent supply of national basic energy [1,2]. However, with the large-scale and high-intensity mining of coal resources in the West at the same time, the ecological environment also has a certain impact, in which the coal gangue is one of the main sources of ecological impact in the mining area, not only occupies a large amount of land, but also on the air and surface water and so on also caused serious pollution [3][4][5]. With the continuous enhancement of social awareness of environmental protection, the negative effects of environmental pollution caused by coal gangue discharge are more and more difficult to accept, and the green treatment of coal mine gangue is imperative [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

DAS Detection Technology for Gangue Slurry Pipeline Conveying Blockage

Zhu,

Qiu,

Liu

et al. 2024

Preprint

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The pipeline conveying system as the gangue slurry filling technology "lifeline". The occurrence of pipeline blockage will lead to the paralysis of the entire filling system; timely detection of pipeline blockage and early warning are needed to ensure the safe, stable, and efficient operation of the core elements of the coal gangue slurry filling system. Based on this, this paper summarizes and analyzes the classification of pipeline blockage and summarizes the current pipeline conveying blockage detection technologies. It elaborates in detail on the principles and advantages and disadvantages of existing pipeline blockage detection technologies, and points out that distributed fiber optic acoustic sensing technology (DAS), as an emerging fiber optic detection technology in recent years, can achieve high-precision, large-scale, real-time dynamic and distributed acoustic detection, Compared with traditional monitoring for pipeline blockage, it is more suitable for detecting blockage in coal gangue slurry pipeline conveying; then from the sensing principle of distributed fiber optic acoustic wave sensing technology, it discusses the current status of DAS technology application, analyzes the pipeline blockage DAS detection mechanism, and verifies the feasibility of pipeline conveying blockage detection based on the distributed fiber optic acoustic wave sensing technology by building a pipeline blockage DAS detection simulation experiment system; finally, it puts forward the feasibility of distributed fiber optic acoustic wave sensing technology; finally, it puts forward the feasibility of distributed fiber optic wave sensing technology detection. Finally, a pipeline blockage DAS detection and identification system is proposed, the function of each subsystem is introduced, and the core key technology involved in the pipeline blockage DAS detection and identification system is analyzed in detail, and the future development direction of gangue slurry pipeline conveying blockage DAS detection technology is also pointed out in order to provide reference for the development of the subsequent gangue slurry pipeline blockage and other pipeline conveying blockage DAS detection technology.

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Section: Introductionmentioning

confidence: 99%

DAS Detection Technology for Gangue Slurry Pipeline Conveying Blockage

Zhu,

Qiu,

Liu

et al. 2024

Preprint

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“…e pneumatic conveying focusing on gas-solid two-phase flow plays an important role in a conveying system. Pneumatic conveying is widely used in energy [5,6], the chemical industry [7], metallurgy [8,9], food processing [10], and other fields. A two-phase flow system is more complex than a single-phase flow system due to the interface effects, relative velocity between the gas and solid, and the randomness of the phase interface.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, in order to reduce the air flow speed in pneumatic conveying of coal particles, the influence of swirl strength on the capture speed of bulk coal particles was studied through experiments, and the particle breaking process and energy change law in the large coal particle pneumatic conveying with different pipeline structure and swirl strength were studied. Yang [8,9] first applied the pneumatic conveying to the working face of the coal auger in the extremely thin coal seam and proposed the coal and gangue pneumatic conveying and filling system including the underground separation, the underground transportation, and the pneumatic filling; at the same time, the author designed the precise pressurization system, the high-efficiency dust removal system, and the antiblocking system for the pneumatic conveying of coal particles, which could improve the safety and reliability of pneumatic conveying system for coal with large particle. Yang [31,32] carried out simulation and experimental research on the pneumatic suspension behavior of large irregular coal particles, obtained the suspension speed of coal particles under different particle sizes, and studied the influence of structural parameters of 5-30 mm coal particle gas-solid injection feeder on the pure flow field injection performance and particle injection performance through multifactor orthogonal experiment.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Horizontal Pneumatic Conveying of Large Coal Particles Using Discrete Phase Model

Yang

Wang

et al. 2020

Advances in Materials Science and Engineering

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The pneumatic conveying focusing on gas-solid two-phase flow plays an important role in a conveying system. Previous work has been conducted in the fields of small particles, where the size was less than 5 mm; however, there are few studies regarding large sizes (>5 mm). In order to predict the horizontal pneumatic conveying of large coal particles, the coupling methods based on the Euler–Lagrange approach and discrete phase model (DPM) have been used for the simulated research. Compared with the experimental results under the same working condition, the particle trajectory obtained by simulation is similar to the particle distribution at the same position in the experiment, and it turns out that the simulation method is feasible for the horizontal pneumatic conveying of large particles. Multifactor simulations are also carried out to analyse the effects of particle size, flow field velocity, solid-gas rate, and pipe diameter on the wall abrasion during horizontal pneumatic conveying, which provides simulation reference and design guide for pneumatic conveying of large particles.

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“…As a kind of airtight conveying mode, pneumatic conveying has the advantages of environmental friendliness and no-dust overflow [4]. Applying the pneumatic conveying system to the field of coal particle conveying can avoid the direct contact between coal particles and the atmosphere [5]. It is of great significance to improve the surrounding environment of coal enterprises, avoid safety production accidents and realize the green use of coal resources.…”

Section: Introductionmentioning

confidence: 99%

Research on the Pressure Dropin Horizontal Pneumatic Conveying for Large Coal Particles

Yang

Wang

Hu³

2020

Processes

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As a type of airtight conveying mode, pneumatic conveying has the advantages of environmental friendliness and conveying without dust overflow. The application of the pneumatic conveying system in the field of coal particle conveying can avoid direct contact between coal particles and the atmosphere, which helps to reduce the concentration of air dust and improve environmental quality in coal production and coal consumption enterprises. In order to predict pressure drop in the pipe during the horizontal pneumatic conveying of large coal particles, the Lagrangian coupling method and DPM (discrete particle model) simulation model was used in this paper. Based on the comparison of the experimental results, the feasibility of the simulation was verified and the pressure drop in the pipe was simulated. The simulation results show that when the flow velocity is small, the simulation results of the DPM model are quite different from that of the experiment. When the flow velocity is large, the large particle horizontal pneumatic conveying behavior predicted by the model is feasible, which can provide a simulation reference for the design of the coal pneumatic conveying system.

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Recent Patents on Gangue Pneumatic Filling for Coal Auger Mining Method

Cited by 9 publications

References 0 publications

DAS Detection Technology for Gangue Slurry Pipeline Conveying Blockage

DAS Detection Technology for Gangue Slurry Pipeline Conveying Blockage

Prediction of Horizontal Pneumatic Conveying of Large Coal Particles Using Discrete Phase Model

Research on the Pressure Dropin Horizontal Pneumatic Conveying for Large Coal Particles

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