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- Title
Fracture behavior of red sandstone under copper wire electric explosion.
- Authors
WANG Zhaohan; ZHANG Chenhui; YU Hang; KUANG Chunlin; ZHANG Fengpeng; PENG Jianyu
- Abstract
Wire electric explosion for breaking rock is a kind of environmental and promising technology. To understand the fracture behavior of rocks under wire electric explosion, this study carried out model experiments of copper wire electric explosion for breaking red sandstone by using a high voltage pulse discharges apparatus. The process of crack initiation and propagation on the surface of the specimen was observed by using an ultra-high speed camera. The effects of discharge voltage and explosion source location on the rock fracturing were analyzed. This experimental study is innovative. The experimental results show that the fracture behavior was related to the discharge voltage. Under the discharging voltage of 30 kV, the electric explosion of metal wire did not effectively break the red sandstone. However, under the discharging voltage of 40 kV, there are several macroscopic cracks in the red sandstone, and the specimen was broken into fragments. In addition, as the distance between the explosion source and the surface of the specimen decreases, the cracks on the surface become more developed and the fracture degree of red sandstone becomes more serious.
- Subjects
ELECTRIC wiring; ELECTRIC wire; SANDSTONE; ROCK deformation; EXPLOSIONS; COPPER wire; DUST explosions
- Publication
Nonferrous Metals (Mining Section), 2022, Vol 74, Issue 3, p36
- ISSN
1671-4172
- Publication type
Article
- DOI
10.3969/j.issn.1671-4172.2022.03.006