Effects of Loading Rate on Strength and Failure of Coal Rock from Hancheng
| Autor: | Zhi Yin Wang, Yun Long Cui, Bin Zhao |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Young's modulus symbols.namesake Compressive strength Brittleness Creep Mechanics of Materials Ultimate tensile strength symbols General Materials Science Geotechnical engineering Coal Composite material business Failure mode and effects analysis Ductility (Earth science) |
| Zdroj: | Key Engineering Materials. :589-592 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.577-578.589 |
| Popis: | The effects of loading rate on splitting test, uniaxial compression strength, strength parameters in triaixal compression test, and creep failure of Hangcheng coal rock were investigated through indoor mechanical experiments. Experimental results shown that tensile strength, uniaxial strength and Youngs modulus of coal rock increased with the increase of loading rate and the increment is very small. Triaixal compression strength and loading rate has a linear relation. Brittleness was very marked under high loading rate. Ductility of coal rock in the steady creep stage diminished with the increase of loading rate, and failure mode of coal rock had a change from low ductility failure mode to ductile-to-brittle failure mode. The results of experimental researches can be used to determine the bottom hole flowing pressure of coalbed methane well. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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