<abstract xmlns="http://www.w3.org/1999/xhtml">The method of unconventional solid rock loosening with undercutting anchors and the literature analysis of the problem are presented. The tests and test results of the rocks loosening process with a fixed undercutting anchor are described. The tests were carried out within the RODEST project, OPUS 10 competition No. 2015/19/B/ST10/02817, financed by the National Science Centre. Numerical modeling process as well as a series of laboratory and in situ tests were carried out. The test stand equipment and methodology for the in situ tests are presented. The tests were conducted in four mines, which allowed to obtain and determine the following characteristics:
<list list-type="order"><list-item>loosening force as a function of anchoring depth (for a given type of rock),</list-item><list-item>the range of rock loosening in a function of anchoring depth (for a given type of rock), and</list-item><list-item>loosened rock volume as a function of anchoring depth (for a given type of rock).</list-item></list>The in situ test results are compared with the concrete capacity design (CCD) model used for the calculation of anchor load capacity in concrete.</abstract>

The method of unconventional solid rock loosening with undercutting anchors and the literature analysis of the problem are presented. The tests and test results of the rocks loosening process with a fixed undercutting anchor are described. The tests were carried out within the RODEST project, OPUS 10 competition No. 2015/19/B/ST10/02817, financed by the National Science Centre. Numerical modeling process as well as a series of laboratory and in situ tests were carried out. The test stand equipment and methodology for the in situ tests are presented. The tests were conducted in four mines, which allowed to obtain and determine the following characteristics:
loosening force as a function of anchoring depth (for a given type of rock),the range of rock loosening in a function of anchoring depth (for a given type of rock), andloosened rock volume as a function of anchoring depth (for a given type of rock).The in situ test results are compared with the concrete capacity design (CCD) model used for the calculation of anchor load capacity in concrete.

Testing the rocks loosening process by undercutting anchors

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Testing the rocks loosening process by undercutting anchors"}

The method of unconventional solid rock loosening with undercutting anchors and the literature analysis of the problem are presented. The tests and test...

Testing the rocks loosening process by undercutting anchors

Article Category: Original Study

Published Online: Jul 09, 2020

Page range: 276 - 290

Received: Nov 18, 2019

Accepted: May 05, 2020

DOI: https://doi.org/10.2478/sgem-2019-0052

Keywords
destroying the integrity of rocks, tearing out rock fragments, mine rescue operations, unconventional rock cutting, rock strength tests

© 2020 Michał Siegmund et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Testing the rocks loosening process by undercutting anchors

Article Category: Original Study

Published Online: Jul 09, 2020

Page range: 276 - 290

Received: Nov 18, 2019

Accepted: May 05, 2020

DOI: https://doi.org/10.2478/sgem-2019-0052

Keywordsdestroying the integrity of rocks, tearing out rock fragments, mine rescue operations, unconventional rock cutting, rock strength tests

© 2020 Michał Siegmund et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
destroying the integrity of rocks, tearing out rock fragments, mine rescue operations, unconventional rock cutting, rock strength tests