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Dynamic random arching in the flow field of top-coal caving mining

Journal Article


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Abstract


  • The large mining height fully mechanized top-coal caving mining technique has developed rapidly and become the most extensively used mining method for ultra-thick coal seams. The arching of coal/gangue and the drawing out of gangue are peculiar phenomena in the process of fully mechanized top-coal caving mining, which not only affects the recovery of top-coal, but also affects the quality of the coal. This paper studies the arching phenomenon in top-coal caving mining process of ultra-thick coal seam. A series of laboratory granular material simulation experiments were performing and a top-coal arching model in the framework of mechanics was established to explore the formation characteristic of arches and their effects to top-coal loss. Then the countermeasures against the arches and technology path of intelligent mining based on improving top-coal recovery were put forward and performed in practice. The results show that the recovery ratio of top-coal has increased nearly 6%, and increased the production efficiency at the same time. The research on arching mechanism and removing strategies of dynamic random arches effectively improves the efficiency of fully mechanized top-coal caving mining in ultra-thick coal seams, and provides the foundation for the realization of intelligent top-coal caving mining technology.

UOW Authors


  •   Zhang, Ningbo (external author)
  •   Liu, Changyou (external author)
  •   Wu, Xiaojie (external author)
  •   Ren, Ting

Publication Date


  • 2018

Citation


  • Zhang, N., Liu, C., Wu, X. & Ren, T. (2018). Dynamic random arching in the flow field of top-coal caving mining. Energies, 11 (5), 1106-1106.

Scopus Eid


  • 2-s2.0-85047073540

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2416&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1414

Number Of Pages


  • 0

Start Page


  • 1106

End Page


  • 1106

Volume


  • 11

Issue


  • 5

Place Of Publication


  • Switzerland

Abstract


  • The large mining height fully mechanized top-coal caving mining technique has developed rapidly and become the most extensively used mining method for ultra-thick coal seams. The arching of coal/gangue and the drawing out of gangue are peculiar phenomena in the process of fully mechanized top-coal caving mining, which not only affects the recovery of top-coal, but also affects the quality of the coal. This paper studies the arching phenomenon in top-coal caving mining process of ultra-thick coal seam. A series of laboratory granular material simulation experiments were performing and a top-coal arching model in the framework of mechanics was established to explore the formation characteristic of arches and their effects to top-coal loss. Then the countermeasures against the arches and technology path of intelligent mining based on improving top-coal recovery were put forward and performed in practice. The results show that the recovery ratio of top-coal has increased nearly 6%, and increased the production efficiency at the same time. The research on arching mechanism and removing strategies of dynamic random arches effectively improves the efficiency of fully mechanized top-coal caving mining in ultra-thick coal seams, and provides the foundation for the realization of intelligent top-coal caving mining technology.

UOW Authors


  •   Zhang, Ningbo (external author)
  •   Liu, Changyou (external author)
  •   Wu, Xiaojie (external author)
  •   Ren, Ting

Publication Date


  • 2018

Citation


  • Zhang, N., Liu, C., Wu, X. & Ren, T. (2018). Dynamic random arching in the flow field of top-coal caving mining. Energies, 11 (5), 1106-1106.

Scopus Eid


  • 2-s2.0-85047073540

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2416&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1414

Number Of Pages


  • 0

Start Page


  • 1106

End Page


  • 1106

Volume


  • 11

Issue


  • 5

Place Of Publication


  • Switzerland