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The Effect of Confining Pressures on Rock Fracturing under Dynamic Loads

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Abstract:

In order to investigate the effect of confining pressures on rock dynamic fracturing under dynamic loads, a 2D finite difference dynamic numerical model for a circular rock sample with a single centralized borehole is developed. According to the material properties and loading conditions, shock and linear equations of state are combined and applied to the rock material in this model. A modified principal stress failure criterion is applied to determining material status. It is shown that as the increase of mining depth, the extent of blasting-induced damage of rock increases significantly.

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Periodical:

Advanced Materials Research (Volume 320)

Pages:

255-258

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.320.255

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Online since:

August 2011

Authors:

Zhe Ming Zhu, Zhi Rong Zhou, Yong Qian Li, Ye Xue Li

Keywords:

Blasting Load, Confining Stress, Crack, Numerical Simulation, Rock Fracturing

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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References

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