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- W2351492902 abstract "This paper has studied the top coal caving below roof and floor for horizontal section top coal caving in steep seam,and has analyzed the losing of triangular coal below roof and floor,and has researched the boundary state between coal and rock.Thereby,based on the caving radio of triangular coal below floor we refer to how to set rational sublevel height of top coal and how to enactment the position of support.Furthermore,based on the boundary state between coal and rock,we put forward the principle of top coal caving that is use time to control close and open the exit of coal caving,this principle is differ to that principle of which close support exit when meet the waste rock.All the study can offer rational parameter for horizontal section top coal caving in steep seam." @default.
- W2351492902 created "2016-06-24" @default.
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- W2351492902 date "2006-01-01" @default.
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- W2351492902 title "Study on top coal caving below roof and floor in steep seam" @default.
- W2351492902 hasPublicationYear "2006" @default.
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