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| Compaction and fragmentation characteristics of loose micaschist |
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Received:March 01, 2012
Revised:January 28, 2013
Accepted:March 06, 2012
Published Online:March 15, 2013
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| DOI： |
| KeyWord:compaction test; fragmentation characteristic; loose micaschist; grain-size distribution; breakage index |
| Author | Institution |
| WU Yong |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| LI Ke-gang |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| LIANG Wei |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| HOU Ke-peng |
Faculty of Land Resource Engineering,Kunming University of Science and Technology |
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| Abstract: |
| Taking loose micaschist of strip-mine as study object, compaction tests on loose rock materials was carried out in different gradation and water content conditions, the compaction properties of loose rock materials and the relationships of the coarse particle content with the maximum dry densities, optimum water content and void ratio were analyzed. On that basis, Bg as particle breakage index was applied to discuss the fragmentation characteristic of loose particle in the process of compaction. The research shows that: (1) the maximum dry densities of loose micaschist first increases and then decreases with the increase of coarse particle content, and the optimum water content and void ratio are the opposite; (2) the maximum dry densities appear peak-value when the coarse particle content of loose micaschist is 60%~70%, also the water content and void ratio of sample are the smallest, all these illustrate that the loose rock materials have the best compaction in this distribution; (3) there would be no fragmentation behaviors under the same compaction when the coarse particle content of loose micaschist is less than 10%, meanwhile the breakage index does not change along with moisture content; (4) the coarse particle content and water content are two key factors to affect the particle breakage index, but the effect of coarse particle content is more significant than the water content. |
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