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

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in Underground Mining./
作者:	Gregory, Nicole A.
面頁冊數:	1 online resource (44 pages)
附註:	Source: Masters Abstracts International, Volume: 76-08.
Contained By:	Masters Abstracts International76-08.
標題:	Mining. -
電子資源:	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:

1413645
Mining.
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.
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500 $a Source: Masters Abstracts International, Volume: 76-08.
500 $a Publisher info.: Dissertation/Thesis.
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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. $3 1413645
650 4 $a Mining engineering. $3 811220
655 7 $a Electronic books. $2 local $3 554714
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