Study of rock fracture under blast loading

• Autorzy: Baranowski Paweł , Kucewicz Michał , Pytlik Mateusz , Małachowski Jerzy

Identyfikatory

DOI

10.24425/bpasts.2022.141723

• Języki publikacji: EN

Abstrakty

EN

A study of dolomite rock material failure using a simple small-scale blast setup is presented. Laboratory tests were conducted using disc specimens drilled with a borehole in the center. A detonation cord and a blasting cap were fitted inside the borehole to induce cracking and fracturing of the specimens. The specimens were inserted between two steel plates, which were compressed against the specimen using bolt screws. Prior to testing, the most suitable screw torque for constraining the vertical displacement of the specimen surfaces without compressing the specimen was selected based on numerical simulations. Then, the experimental tests with the blasting cap were simulated using the Johnson–Holmquist II (JH-2) material model, and the properties of the blasting cap were determined and verified in two special tests with a lead specimen. Possessing the validated model, the influence of specimen thickness on the cracking patterns was finally analyzed. This paper presents a relatively easy method for studying rock material behavior under blast loading and for validating the numerical and constitutive models used for rock simulations.

Słowa kluczowe

EN

Johnson-Holmquist II model; JH-2; rock; blasting; fracture; small-scale testing

PL

model Johnsona-Holmquista II; JH-2; głazy; strzałowy; pęknięcie; test na małą skalę

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2022
• Tom: Vol. 70, nr 5
• Strony: art. no. e141723
• Opis fizyczny: Bibliogr. 61 poz., rys., tab.

Twórcy

autor

Baranowski Paweł

• Military University of Technology, Faculty of Mechanical Engineering, Institute of Mechanics & Computational Engineering, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

• https://orcid.org/0000-0002-5320-9479

autor

Kucewicz Michał

• Military University of Technology, Faculty of Mechanical Engineering, Institute of Mechanics & Computational Engineering, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

• https://orcid.org/0000-0002-2288-050X

autor

Pytlik Mateusz

• Central Mining Institute, Conformity Assessment Body, 40-166 Katowice, Poland

• https://orcid.org/0000-0001-6659-2406

autor

Małachowski Jerzy

• Military University of Technology, Faculty of Mechanical Engineering, Institute of Mechanics & Computational Engineering, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

• https://orcid.org/0000-0003-1300-8020

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).