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Brittle, but not boring: a fresh look at osteogenesis imperfecta type V.
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Institut de Recherches Cliniques de Montréal, Montréal, Québec, Canada.
Experimental investigation on rock fragmentation charactersitics of pressurized pulsed water jet.
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State Key Laboratory of Shield Machine and Boring Technology, Zhengzhou, 450001, Henan, China.
As a novel type of pulsed water jet (PWJ), the pressurized pulsed water jet (PPWJ) shows great potential in the field of rock fragmentation engineering. In this study, the macro and micro morphologies of erosion craters on different targets (sandstone and granite) were measured to investigate the rock fragmentation characteristics of PPWJ. The results show that the fragmentation processes of granite and sandstone are significantly different from each other.
View Article and Find Full Text PDFMechanism Analysis of Rock Failure Process under High-Voltage Electropulse: Analytical Solution and Simulation.
Materials (Basel)
March 2022
Department of Civil Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200092, China.
This work aims to investigate and analyse the mechanism of rock failure under high-voltage electropulses in order to evaluate and increase the efficiency of high-voltage pulse technology in geological well drilling, tunnel boring, and other geotechnical engineering applications. To this end, this paper discusses the equivalent circuit of electric pulse rock breaking, the model of shock wave in electro channel plasma, and, particularly, the model of rock failure in order to disclose the rock failure process when exposed to high-voltage electropulse. This article uses granite as an example to present an analytical approach for predicting the mechanical behaviour of high-voltage electropulses and to analyse the damage that occurs.
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