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- W2389019866 abstract "Borehole fracture mechanisms and ways to effect engineering controls of them are serious problems in surface borehole engineering.A tension-shear deformation model was used to predict surface borehole fracture modes.The model was based on division of the rock strata into different classes.Shear,squeezing,and tension-shear fracture appear as the surface borehole fracture modes.The nature of the strata favor one or the other of these modes and the engineering controls used should be different in the different cases.A limit analysis approach was used to establish criteria to distinguish case fracture.This suggested that a surface borehole shear or tension safety factor less than some threshold value risks case displacement.If the plastic region penetrates the case the surface borehole will be destroyed.This technique was used on a surface borehole in the Jincheng coal mine with good results." @default.
- W2389019866 created "2016-06-24" @default.
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- W2389019866 date "2013-01-01" @default.
- W2389019866 modified "2023-09-25" @default.
- W2389019866 title "A surface borehole interface model and the limit analysis estimation method" @default.
- W2389019866 hasPublicationYear "2013" @default.
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