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dc.contributor.authorKuznetsova, N.
dc.contributor.authorZhgun, D.
dc.contributor.authorGolovanevskiy, Vladimir
dc.identifier.citationKuznetsova, N. and Zhgun, D. and Golovanevskiy, V. 2022. Plasma blasting of rocks and rocks-like materials: An analytical model. International Journal of Rock Mechanics and Mining Sciences. 150: ARTN 104986.

Plasma blasting technology (PBT) is a potential alternative to chemical blasting and mechanical cutting methods for fragmentation of natural rocks, concrete, geopolymers, and other rocks-like materials. We present an analytical model of PBT addressing currently inadequate understanding of the dynamics of shock waves generation and propagation versus the electric energy release conditions. The proposed model describes the operation of the electrical discharge circuit, plasma channel initiation and expansion, and the generation and propagation of shock and pressure waves in the destructible solid. The dynamics of the power generator energy conversion into the plasma channel and into the wave of mechanical stresses in the solid are considered and the main factors determining the efficiency of the method, namely the pulse generator circuit parameters, exploding wire length, and shock wave-transmitting media, are evaluated. Solid fracture efficiency is shown to depend on the pressure pulse wave shape which, in turn, is determined by the rate of electrical energy deposition into the plasma channel. Increasing the exploding wire length leads to an earlier formation of the tensile tangential stresses and to their higher magnitude and thus facilitates material's fragmentation. The use of acoustically stiff media for shock wave transfer marginally improves material's fracture efficiency. Preliminary verification of the functionality of the model was carried out using commercial concretes, with good agreement between the analytically derived and experimentally obtained values. The results demonstrate that the proposed model allows to simulate PBT fracture over a wide range of instrumental and process conditions and can therefore be used for PBT process design, thus realising environmental and economic benefits through significant savings in time and experimental confirmation costs.

dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectEngineering, Geological
dc.subjectMining & Mineral Processing
dc.subjectPlasma blasting technology (PBT)
dc.subjectShock wave dynamics
dc.subjectShock wave induced stresses
dc.subjectNatural rocks
dc.subjectRocks-like materials
dc.titlePlasma blasting of rocks and rocks-like materials: An analytical model
dc.typeJournal Article
dcterms.source.titleInternational Journal of Rock Mechanics and Mining Sciences
curtin.departmentWASM: Minerals, Energy and Chemical Engineering
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidGolovanevskiy, Vladimir [0000-0001-8925-4354]
curtin.identifier.article-numberARTN 104986
curtin.contributor.scopusauthoridGolovanevskiy, Vladimir [24400598300]

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