Analyzing the fissuration of the boreholes and comparing the different methods
Fissuring of rocks is frequently of greater importance in practical rock engineering operations than the strength of the intact rock. In practice boreholes are usually analyzed by the RQD method. The limitation of this method has been discussed by several authors: for example, for RQD = 0 % [that is...
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ftmtak:oai:real.mtak.hu:10679 2024-06-09T07:47:29+00:00 Analyzing the fissuration of the boreholes and comparing the different methods Vásárhelyi, Balázs Váró, Ágnes Kovács, László 2007 text https://real.mtak.hu/10679/ https://real.mtak.hu/10679/1/1218162.pdf en eng https://real.mtak.hu/10679/1/1218162.pdf Vásárhelyi, Balázs and Váró, Ágnes and Kovács, László (2007) Analyzing the fissuration of the boreholes and comparing the different methods. CENTRAL EUROPEAN GEOLOGY, 50 (4). pp. 343-351. ISSN 1788-2281 QE06 Petrology. Petrography / kőzettan petrográfia TN Mining engineering. Metallurgy / bányászat kohászat fémipar Article PeerReviewed info:eu-repo/semantics/article 2007 ftmtak 2024-05-15T13:44:04Z Fissuring of rocks is frequently of greater importance in practical rock engineering operations than the strength of the intact rock. In practice boreholes are usually analyzed by the RQD method. The limitation of this method has been discussed by several authors: for example, for RQD = 0 % [that is, where the joint intercept (distance between joints in the cores) is 10 cm or less], or RQD = 100%, the RQD provides no information on the core pieces themselves. It does not matter whether the discarded pieces are soil or fresh rock pieces up to 10 cm in length. In early 2003, more than 3,000 meter-long boreholes were analyzed in parallel with two different methods: traditional RQD, and Hansági's C (or Kiruna) Method. According to the results, in the case of a very good or very poor core, the C method shows the jointing patterns better than the widely-used RQD method. The goal of this paper is to present the C method and its advandages/disadvandages. Linear regression was found for the values between 10% < RQD < 90%, but the C value is much more sensitive than the RQD. The classification of the boreholes according to C method is also presented. Article in Journal/Newspaper Kiruna MTAK: REAL (Library and Information Centre of the Hungarian Academy of Sciences Kiruna |
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Open Polar |
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MTAK: REAL (Library and Information Centre of the Hungarian Academy of Sciences |
op_collection_id |
ftmtak |
language |
English |
topic |
QE06 Petrology. Petrography / kőzettan petrográfia TN Mining engineering. Metallurgy / bányászat kohászat fémipar |
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QE06 Petrology. Petrography / kőzettan petrográfia TN Mining engineering. Metallurgy / bányászat kohászat fémipar Vásárhelyi, Balázs Váró, Ágnes Kovács, László Analyzing the fissuration of the boreholes and comparing the different methods |
topic_facet |
QE06 Petrology. Petrography / kőzettan petrográfia TN Mining engineering. Metallurgy / bányászat kohászat fémipar |
description |
Fissuring of rocks is frequently of greater importance in practical rock engineering operations than the strength of the intact rock. In practice boreholes are usually analyzed by the RQD method. The limitation of this method has been discussed by several authors: for example, for RQD = 0 % [that is, where the joint intercept (distance between joints in the cores) is 10 cm or less], or RQD = 100%, the RQD provides no information on the core pieces themselves. It does not matter whether the discarded pieces are soil or fresh rock pieces up to 10 cm in length. In early 2003, more than 3,000 meter-long boreholes were analyzed in parallel with two different methods: traditional RQD, and Hansági's C (or Kiruna) Method. According to the results, in the case of a very good or very poor core, the C method shows the jointing patterns better than the widely-used RQD method. The goal of this paper is to present the C method and its advandages/disadvandages. Linear regression was found for the values between 10% < RQD < 90%, but the C value is much more sensitive than the RQD. The classification of the boreholes according to C method is also presented. |
format |
Article in Journal/Newspaper |
author |
Vásárhelyi, Balázs Váró, Ágnes Kovács, László |
author_facet |
Vásárhelyi, Balázs Váró, Ágnes Kovács, László |
author_sort |
Vásárhelyi, Balázs |
title |
Analyzing the fissuration of the boreholes and comparing the different methods |
title_short |
Analyzing the fissuration of the boreholes and comparing the different methods |
title_full |
Analyzing the fissuration of the boreholes and comparing the different methods |
title_fullStr |
Analyzing the fissuration of the boreholes and comparing the different methods |
title_full_unstemmed |
Analyzing the fissuration of the boreholes and comparing the different methods |
title_sort |
analyzing the fissuration of the boreholes and comparing the different methods |
publishDate |
2007 |
url |
https://real.mtak.hu/10679/ https://real.mtak.hu/10679/1/1218162.pdf |
geographic |
Kiruna |
geographic_facet |
Kiruna |
genre |
Kiruna |
genre_facet |
Kiruna |
op_relation |
https://real.mtak.hu/10679/1/1218162.pdf Vásárhelyi, Balázs and Váró, Ágnes and Kovács, László (2007) Analyzing the fissuration of the boreholes and comparing the different methods. CENTRAL EUROPEAN GEOLOGY, 50 (4). pp. 343-351. ISSN 1788-2281 |
_version_ |
1801378598788005888 |