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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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Journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2137-2153页

作者： Wei Ming Xiaojie Yang Yadong Mao Xiang Wang Manchao He Zhigang Tao College of Civil and Architecture Engineering North China University of Science and TechnologyTangshan063210China State Key Laboratory for Tunnel Engineering China University of Mining and Technology-BeijingBeijing100083China School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing100083China

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 *** the increase in nuclear explosion power,underground protection engineering enabled by explosion-proof impact theory and technology ushered in a new *** paper proposes to simulate nuclear explosion tests with on-site chemical explosion tests in the form of multi-hole ***,the mechanism of using multi-hole simultaneous blasting to simulate a nuclear explosion to generate approximate plane waves was *** plane pressure curve at the vault of the underground protective tunnel under the action of the multi-hole simultaneous blasting was then obtained using the impact test in the rock mass at the *** 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 *** time-history curves of pressure and peak pressure partition obtained by the on-site multi-hole simultaneous blasting test and numerical simulation were compared and analyzed,to verify the correctness and rationality of the formation of an approximate plane wave in the simulated nuclear *** comparison and analysis also provided a theoretical foundation and some research ideas for the ensuing study on the impact of a nuclear explosion.

关键词： Approximate plane wave Multi-hole simultaneous blasting Chemical explosion nuclear explosion Pressure sensor inclusion

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Discrimination between nuclear explosions and earthquakes based on consideration of tectonic ambient shear stress values

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Acta Seismologica Sinica(English Edition) 2001年第3期14卷 259-262页

作者： CHEN Pei-shan Institute of Geophysics China Seismological Bureau Beijing China

On the basis of fracture mechanics earthquake rupture model, the relations between source parameters and τ0, the value of tectonic ambient shear stress in the place where the earthquake occurs, have been derived. Thus, we can calculate a large number of values of tectonic ambient shear stress or values of background stress in the place where the earthquake occurs. If nuclear explosions are treated as earthquakes in the calculation, we find that τ0 values of nuclear explosions have about 20 MPa, which is obviously higher than average τ0 values of earthquakes with the same magnitude. This result can be used to discriminate nuclear explosions from earthquakes.

关键词： Discrimination of nuclear explosions from earthquakes Earthquake Level of stress field nuclear explosion Tectonic ambient shear stress field

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Effects of nuclear chimney on climate

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Journal of Environmental Sciences 1990年第4期2卷 111-116页

作者： Gao Suhua, Ding Yihui, Pan Yaru and Zhang QingchenAcademy of Meteorological Science State Meteorological Administration,Beijing 100081,China

In this paper, according to the data from several single nuclear explosion experiments of an equivalent to magnitude of million tons, and combined with meteorological data, their effects on the regional climate nave b... 详细信息

关键词： nuclear chimney nuclear explosion temperature change.

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Ghana's experience in the establishment of a national data center

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Earthquake Science 2012年第4期25卷 347-351页

作者： Amponsah Paulina Ekua Serfor-Armah Yaw Ghana Atomic Energy Commission P.O.Box LG80 Legon Accra 233 Ghana Graduate School of nuclear and Allied Sciences University of GhanaAtomic Campus P.O.Box AE1 Atomic Ghana Accra 233 Ghana

The government of Ghana in a bilateral agreement with the Preparatory Commission for the Comprehensive nuclear Test-Ban Treaty Organization （CTBTO） has established a National Data Center in Ghana with the aim of monitoring the testing of nuclear explosions. Seismic, hydroacoustic, radionuclide and infrasound methods are used for the monitoring. The data center was commissioned on 3 February, 2010 at the Ghana Atomic Energy Commission. At present Ghana does not have any operational, centralised data （seismic, hydroacoustic, radionuclide and infrasound） acquisition system with the capability of accessing data from other international stations. Hence, the need of setting up the National Data Center which would enable us constantly monitor, manage and coordinate both natural and man-made seismic activities in the country and around the globe, upload data to the International Data Center （IDC） as well as receive and use International Monitoring System （IMS） data and IDC products for treaty verification and compliance. Apart from these, the center also accesses and analyzes seismic waveforms relevant to its needs from the International Data Center; makes data available to its stakeholder institutions for earthquake disaster mitigation; reports on all aspects of disasters related to earthquake to the relevant government agencies that deal with disasters; makes recommendations to the government of Ghana on earthquake safety measures; provides information to assist government institutions to develop appropriate land and building policies. The center in collaboration with stakeholder agencies periodically organises public lectures on earthquake disaster risk mitigation.

关键词： Ghana seismicity treaty nuclear explosion

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