The Rock Failure Mechanism of Air-Decked Blasting in Hole Bottom

Liang Wu; Yong Zhou; Zhi Hua Guo

doi:10.4028/www.scientific.net/AMM.201-202.375

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 201-202The Rock Failure Mechanism of Air-Decked Blasting...

The Rock Failure Mechanism of Air-Decked Blasting in Hole Bottom

Abstract:

The application of air-decked blasting technology has enabled the efficient use of explosion energy, which proves that the air-decked blasting technology can overcome many disadvantages caused by column charge effectively, getting ideal explosion effect. Based on the JHC model of concrete damage evolution, the dynamic stress characteristics and failure mechanism of blast-hole near-field about bottom-air-decked charge structure is studied by numerical simulation. Result shows that the failure mechanism of typical elements changes from compression-shear failure into shear-tensile failure gradually with the increase of their position, for the effecting factors of the freedom and the loading from the hole. Comparing the dynamic stress characteristics of different detonating manners, indirect initiation can improve the static function intensity and delay the time of detonation gas, so it is easier to destroy the bottom rock of hole.

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Periodical:

Applied Mechanics and Materials (Volumes 201-202)

Pages:

375-378

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.201-202.375

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Online since:

October 2012

Authors:

Liang Wu, Yong Zhou, Zhi Hua Guo

Keywords:

Air-Decked, Dynamic Stress, Engineering Blasting, Numerical Simulation

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