Dynamic caustics model experiment of blasting crack developing on sandwich rock

XIAO Tong-she; YANG Ren-shu; ZHUANG Jin-zhao; LI Qing

doi:10.11883/1001-1455(2007)02-0159-06

Volume 27 Issue 2

Oct. 2014

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Article Navigation > Explosion And Shock Waves > 2007 > 27(2): 159-164

Li Xuezheng, Wang Minchao. Particle velocity models on small yields underground explosions[J]. Explosion And Shock Waves, 2017, 37(5): 899-905. doi: 10.11883/1001-1455(2017)05-0899-07

Citation:

XIAO Tong-she, YANG Ren-shu, ZHUANG Jin-zhao, LI Qing. Dynamic caustics model experiment of blasting crack developing on sandwich rock[J]. Explosion And Shock Waves, 2007, 27(2): 159-164. doi: 10.11883/1001-1455(2007)02-0159-06

Li Xuezheng, Wang Minchao. Particle velocity models on small yields underground explosions[J]. Explosion And Shock Waves, 2017, 37(5): 899-905. doi: 10.11883/1001-1455(2017)05-0899-07

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Dynamic caustics model experiment of blasting crack developing on sandwich rock

doi: 10.11883/1001-1455(2007)02-0159-06

1.
School of Mechanics & Civil Engineering, China University of Mining &Technology, Beijing 100083, China;
2.
Collage of Water Conservancy & Civil Engineering, China Agriculture University, Beijing 100083, China

Publish Date: 2007-03-25

Abstract

Abstract

Using the dynamic caustic-test system, the PMMA model transmission-type experiment of dynamic caustics was carried out to simulate the blasting process of rock with joints. Varieties of dynamic intensity factors in the crack-tip field, extensions of cracks going through the joint planes for different distances between hole and joint were analyzed especially under the condition that the initial cracks and joint planes had different separation angles. Experimental results show that the dynamic intensity factor of the crack-tip and the extension speed decrease dramatically while the cracks go through joint planes but afterwards the intensity factor increases, that when the crack goes through the joint plane, it can deviate a short distance along the joint, and then continues to develop in its initial direction with respect to the appropriate distance between hole and joint.
- solid mechanics,
- crack extension regularity,
- dynamic caustics,
- sandwich rock,
- stress intensity factor,
- blasting loading

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