首页|A novel method for simulating nuclear explosion with chemical explosion to form an approximate plane wave:Field test and numerical simulation
A novel method for simulating nuclear explosion with chemical explosion to form an approximate plane wave:Field test and numerical simulation
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A nuclear explosion in the rock mass medium can produce strong shock waves,seismic shocks,and other destructive effects,which can cause extreme damage to the underground protection infrastructures.With the increase in nuclear explosion power,underground protection engineering enabled by explosion-proof impact theory and technology ushered in a new challenge.This paper proposes to simulate nuclear explosion tests with on-site chemical explosion tests in the form of multi-hole ex-plosions.First,the mechanism of using multi-hole simultaneous blasting to simulate a nuclear explosion to generate approximate plane waves was analyzed.The plane pressure curve at the vault of the un-derground protective tunnel under the action of the multi-hole simultaneous blasting was then obtained using the impact test in the rock mass at the site.According to the peak pressure at the vault plane,it was divided into three regions:the stress superposition region,the superposition region after surface reflection,and the approximate plane stress wave zone.A numerical simulation approach was developed using PFC and FLAC to study the peak particle velocity in the surrounding rock of the underground protective cave under the action of multi-hole blasting.The time-history curves of pressure and peak pressure partition obtained by the on-site multi-hole simultaneous blasting test and numerical simu-lation were compared and analyzed,to verify the correctness and rationality of the formation of an approximate plane wave in the simulated nuclear explosion.This comparison and analysis also provided a theoretical foundation and some research ideas for the ensuing study on the impact of a nuclear explosion.
Wei Ming、Xiaojie Yang、Yadong Mao、Xiang Wang、Manchao He、Zhigang Tao
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College of Civil and Architecture Engineering,North China University of Science and Technology,Tangshan,063210,China
State Key Laboratory for Tunnel Engineering,China University of Mining and Technology-Beijing,Beijing,100083,China
State Key Laboratory for Tunnel Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China
School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China
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国家自然科学基金一般项目Special Fund for Basic Scientific Research Business Expenses of Central UniversitiesState Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and technology,Beijing,China
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