Diffusion law of coal gangue slurry and the application of fluidized filling technology of gangue in caving area.

Journal

Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288

Informations de publication

Date de publication:
14 Aug 2023
Historique:
received: 28 03 2023
accepted: 04 07 2023
medline: 15 8 2023
pubmed: 15 8 2023
entrez: 14 8 2023
Statut: epublish

Résumé

In order to deeply study the basic characteristics, diffusion laws, and flow laws of coal gangue and coal gangue slurry, the basic characteristic parameters of coal gangue and coal gangue slurry were obtained through particle size distribution test, electron microscope scanning test, X-ray diffraction test, X-ray fluorescence spectrum test, and angle of repose test. The conveying performance test of coal gangue slurry was carried out, and based on this, a simulation test of coal gangue slurry caving areas was designed. The diffusion and flow laws of coal gangue slurry under the same inclination angle were summarized, and the field test of fluidization filling in the caving areas was conducted. The results show that: (1) The water-to-gangue ratio was the main controlling factor for the conveying performance of coal gangue slurry. The extensibility, slump, and bleeding rate of the coal gangue slurry increased with the increase of the water-to-gangue ratio. (2) The diffusion profile of coal gangue slurry at different dip angles was arc-shaped, and the diffusion distance of slurry increased with the increase of infiltration time. However, there were differences in the sustained diffusion ability of different dip angles. (3) At the same time interval, the spatial accumulation patterns of scattered gangue in different regions will lead to differences in the diffusion speed of the slurry. (4) Both burying and hanging pipes in the falling area can safely and efficiently fill the gangue slurry. The diffusion distance of the caving areas in the test working face was basically consistent with the diffusion distance of the slurry in the simulation test of the coal gangue slurry caving areas.

Identifiants

DOI: 10.1038/s41598-023-38165-y PMID: 37580337 PMC: PMC10425454
pubmed: 37580337
doi: 10.1038/s41598-023-38165-y
pii: 10.1038/s41598-023-38165-y
pmc: PMC10425454
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

13226

Subventions

Organisme : National Key Research and Development Program of China
ID : 2019YFC1904304
Organisme : State Key Program of National Natural Science Foundation of China
ID : 52130402
Organisme : Institute of Energy, Hefei Comprehensive National Science Center under Grant
ID : 21KZS217
Organisme : The University Synergy Innovation Program of Anhui Province
ID : GXXT-2021-017

Informations de copyright

© 2023. Springer Nature Limited.

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Auteurs

Ji-Qiang Zhang (JQ)

State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, China.
Key Laboratory of Mining Coal Safety and Construction Efficiency of Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, China.

Xiang He (X)

Institute of Energy, Hefei Comprehensive National Science Center, Hefei, 230031, China. xianghe_cumtb@126.com.
Key Laboratory of Mining Coal Safety and Construction Efficiency of Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, China. xianghe_cumtb@126.com.

Ke Yang (K)

Institute of Energy, Hefei Comprehensive National Science Center, Hefei, 230031, China.
Key Laboratory of Mining Coal Safety and Construction Efficiency of Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, China.

Zhen Wei (Z)

State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, China.
Key Laboratory of Mining Coal Safety and Construction Efficiency of Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, China.

Xin-Yuan Zhao (XY)

State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, China.
Key Laboratory of Mining Coal Safety and Construction Efficiency of Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, China.

Jue-Jing Fang (JJ)

State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, China.
Key Laboratory of Mining Coal Safety and Construction Efficiency of Anhui Province and Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, China.

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