Experimental and numerical investigation on dynamic behaviors of the concrete wall in underground coal mine with hydraulic blasting demolition
Autor: | Xiaowei Zhai, Shibo Wu, Xianming Song, Kai Wang, Wang Weigang, Haitao Li |
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Rok vydání: | 2017 |
Předmět: |
lcsh:Mechanical engineering and machinery
0211 other engineering and technologies crack propagation 02 engineering and technology hydraulic fracturing concrete wall 020501 mining & metallurgy law.invention Hydraulic fracturing law lcsh:TJ1-1570 General Materials Science Geotechnical engineering hydraulic blasting 021101 geological & geomatics engineering Brick Dynamite Mechanical Engineering Fracture mechanics shock waves Stress field Compressive strength 0205 materials engineering Displacement field blasting demolition Fracture (geology) Geology |
Zdroj: | Journal of Vibroengineering, Vol 19, Iss 3, Pp 2043-2062 (2017) |
ISSN: | 2538-8460 1392-8716 |
Popis: | In order to investigate the dynamic response and failure modes of concrete wall under hydraulic blasting load in underground tunnels, the fracture mechanism and zoning characteristics of hydraulic blasting of concrete wall was analyzed theoretically. Stress field, displacement field and energy variation laws of concrete wall has been simulated based on the finite element dynamic program LS/dyna. Meanwhile, different experimental conditions on the dynamite, reserved hole parameters such as demolition parameters are designed studied according to the blasting fracturing principle. The effects of stress wave, high pressure gas expansion effect in the dismantling process, application of line of least resistance principle and directional blasting effect control principle are analyzed. Results reveal the FSI effect between concrete wall and the water-dynamite-pore wall and the relationship between parameters of the structure and the dynamite dynamite, the concrete dynamic compressive strength and dynamic tensile strength. Numerical and experimental methods as well as conclusions will provide basis for the blasting demolition of brick concrete wall under similar conditions. |
Databáze: | OpenAIRE |
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