| Autor: |
Li Changhong, Ma Qiantian, Mao Tianwei |
| Předmět: |
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| Zdroj: |
Metallurgical & Mining Industry; 2015, Issue 9, p316-323, 8p |
| Abstrakt: |
Shear failure and tensor failure are two kinds of failure modes of cemented waste rock backfills. The studies on b-value characteristics of acoustic emission of blocky rock cemented fill with two kinds of failure modes during creep process were carried out by virtue of short-term creep test under step constant load. The results show that: The fluctuation of b-value is like upward serration as the two kinds of specimens are in steady creep stage before the specimen failure. As the Shear failure specimen in tertiary creep stage b-value of acoustic emission shows a circulation pattern that is "upward serrated fluctuation with decreased intensity"; whereas as the tensor failure specimen in tertiary creep stage b-value of acoustic emission shows a continuing upward serrated fluctuation with increased amplitude. Therefore, the cemented waste rock backfills failure can be forecasted by the variation characteristics of b-value to some extent. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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