Object's details: Study of rock fracture under blast loading

Provider:Czasopisma PAN

Description

Title:
Study of rock fracture under blast loading
Creator:
Baranowski, Paweł;
Kucewicz, Michał;
Pytlik, Mateusz;
Małachowski, Jerzy
Contributor:
Baranowski, Paweł : Military University of Technology, Faculty of Mechanical Engineering, Institute of Mechanics & Computational Engineering, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland;
Kucewicz, Michał : Military University of Technology, Faculty of Mechanical Engineering, Institute of Mechanics & Computational Engineering, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland;
Pytlik, Mateusz : Central Mining Institute, Conformity Assessment Body, 40-166 Katowice, Poland;
Małachowski, Jerzy : Military University of Technology, Faculty of Mechanical Engineering, Institute of Mechanics & Computational Engineering, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland
Description:
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.
Object availability:
free access
Rights:
Bulletin of the Polish Academy of Sciences Technical Sciences jest czasopismem wydawanym w wolnym dostępie na licencji CC BY 4.0. </span></p><p style="background: white;"><span style="font-size: 10pt;"> Bulletin of the Polish Academy of Sciences Technical Sciences is an open access journal with all content available with no charge in full text version. The journal content is available under the licencse CC BY 4.0.
Date:
2022.08.17
Type:
Article
Coverage:
e141723
Subject:
Johnson-Holmquist II model (JH-2);
rock blasting;
fracture;
small-scale testing
Identifier:
e-ISSN 2300-1917
Data provider:
Czasopisma PAN

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Object's details: Study of rock fracture under blast loading

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