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- W2383048447 abstract "In order to produce the better result of contour blasting for driving tunnel through soft rocks with advance canopy support,this paper investigates the reasons causing bad result on contour blasting and the method for a better contour blasting.The analysis shows that the blast holes on and next to the perimeter should be drilled outwards with a larger angle,and the blasting parameters for the perimeter holes and the holes next to the perimeter should be designed according to the requirements for smooth blasting.Furthermore,the formulae for calculating the controlled perimeter blasting are presented so that the full utilization of explosive energy can be achieved and the blasting damage in remaining rock of tunnel can be minimized.A case study demonstrates that the parameters for blast holes next to the perimeter are smaller than those for perimeter blast holes.Such results are consistent with engineering practice.It is of significance for obtaining a better result in tunnel-driving through soft rock." @default.
- W2383048447 created "2016-06-24" @default.
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- W2383048447 date "2011-01-01" @default.
- W2383048447 modified "2023-09-24" @default.
- W2383048447 title "Controlled perimeter blasting method for tunnel driving with advance canopy support" @default.
- W2383048447 hasPublicationYear "2011" @default.
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