Damage Evolution and Dynamic Response of Anchorage Caverns with a Crack under Top Explosion

WANG Guangyong; PEI Chenhao; LIN Jiajian

doi:10.11858/gywlxb.20180561

Volume 32 Issue 6

Dec 2018

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Chinese Journal of High Pressure Physics > 2018 > 32(6): 064103.

WANG Xue, ZHI Xiaoqi, XU Jinbo, FAN Xinghua. Dimensional Analysis of Ballistic Limit of Spherical Fragments Penetrating Multi-Layer Plate[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 065102. doi: 10.11858/gywlxb.20190757

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WANG Guangyong, PEI Chenhao, LIN Jiajian. Damage Evolution and Dynamic Response of Anchorage Caverns with a Crack under Top Explosion[J]. Chinese Journal of High Pressure Physics, 2018, 32(6): 064103. doi: 10.11858/gywlxb.20180561

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Damage Evolution and Dynamic Response of Anchorage Caverns with a Crack under Top Explosion

doi: 10.11858/gywlxb.20180561

1.
School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
2.
College of Electrical Engineering and Automation, Anhui University, Hefei 230601, China

Received Date: 13 May 2018
Rev Recd Date: 30 May 2018

Abstract

Abstract

Based on the similar model test, the damage evolution and dynamic response law of anchored caverns with a crack under top explosion was studied by numerical analysis, and the influence of crack angle and length on the damage distribution and crown displacement of the anchor caverns was discussed.With the propagation of the explosion stress waves, tensile damage is formed on the surface of the fracture, and a winged crack extends at the tip of the fracture.Subsequently, a large tensile damage zone was formed successively at the vault free surface near the anchoring cavern, at the boundary of the anchoring zone, and in the middle of the floor.As the crack angle increases from 0° to 90°, the area of the largest damage zone at the boundary of the anchorage zone and the anchorage zone first decreases and then increases, and the area at the crack inclination angle of 45° is the smallest.When the cracks have the same length, the peak displacement of the crown increases first and then decreases with the increase of the crack dip angle.When the fracture angle is the same, the longer the crack length is, the more obvious the obstruction of the stress wave is, and the damage of the cavern with the facture 30 cm in length and 45° in inclination angle under top explosion is minimal.
- underground engineering,
- blast loads,
- anchorage caverns,
- opening crack,
- damage evolution,
- numerical analysis

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Damage Evolution and Dynamic Response of Anchorage Caverns with a Crack under Top Explosion

doi: 10.11858/gywlxb.20180561

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Damage Evolution and Dynamic Response of Anchorage Caverns with a Crack under Top Explosion

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