國立虎尾科技大學 |

A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining./
Author:	Gregory, Nicole A.
Description:	1 online resource (44 pages)
Notes:	Source: Masters Abstracts International, Volume: 76-08.
Contained By:	Masters Abstracts International76-08.
Subject:	Mining engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781321497939

A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining.
Gregory, Nicole A.

A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining. - 1 online resource (44 pages)

Source: Masters Abstracts International, Volume: 76-08.

Thesis (M.S.)--University of Nevada, Reno, 2014.

Includes bibliographical references

Rock bolt pullout testing is a common method of testing the strength of ground support in underground mining over time. Bolts that fail the pullout test fail either due to shear failure at the head of the bolt or by slipping in one piece out of structurally incompetent rock. There are many methods for quantifying rock mass strength; in this study, Bieniawski's Rock Mass Rating (RMR) system is used. This study focuses on the correlation between slipped rock bolt pullout tests with low RMR scores in underground mines. Underground mine sites participating in this study are located in Eastern Nevada, which is infamous for its low rock strength. Bolts used in this study are inflatable friction bolts, primarily Swellex bolts by Atlas Copco but with a few other manufacturers of inflatable friction bolts as well. When data was controlled for corrosive weakening of the bolt and normalized for bolt length, correlations between slipped pull-tests and low RMR scores were generally strong, positive, and statistically significant.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9781321497939Subjects--Topical Terms:

811220
Mining engineering.
Index Terms--Genre/Form:

554714
Electronic books.

A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining.
LDR:02295ntm a22003377 4500 001 1151957
005 20241125080152.5
006 m o d
007 cr mn ---uuuuu
008 250605s2014 xx obm 000 0 eng d
020 $a 9781321497939
035 $a (MiAaPQ)AAI1573205
035 $a (MiAaPQ)unr:11665
035 $a AAI1573205
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Gregory, Nicole A. $3 1478807
245 1 2 $a A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining.
264 0 $c 2014
300 $a 1 online resource (44 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 76-08.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Kallu, Rajagopala.
502 $a Thesis (M.S.)--University of Nevada, Reno, 2014.
504 $a Includes bibliographical references
520 $a Rock bolt pullout testing is a common method of testing the strength of ground support in underground mining over time. Bolts that fail the pullout test fail either due to shear failure at the head of the bolt or by slipping in one piece out of structurally incompetent rock. There are many methods for quantifying rock mass strength; in this study, Bieniawski's Rock Mass Rating (RMR) system is used. This study focuses on the correlation between slipped rock bolt pullout tests with low RMR scores in underground mines. Underground mine sites participating in this study are located in Eastern Nevada, which is infamous for its low rock strength. Bolts used in this study are inflatable friction bolts, primarily Swellex bolts by Atlas Copco but with a few other manufacturers of inflatable friction bolts as well. When data was controlled for corrosive weakening of the bolt and normalized for bolt length, correlations between slipped pull-tests and low RMR scores were generally strong, positive, and statistically significant.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Mining engineering. $3 811220
650 4 $a Mining. $3 1413645
655 7 $a Electronic books. $2 local $3 554714
690 $a 0551
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Nevada, Reno. $b Mining Engineering. $3 1478808
773 0 $t Masters Abstracts International $g 76-08.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1573205 $z click for full text (PQDT)