Simulation Experimental Study on Flow and Block of the Mixed Flow of Water and Sand through the Broken Zone of Rocks

DOI

10.2991/icache-15.2015.44How to use a DOI?

Keywords

mixed flow of water and sand; caving rocks; quicksand; block

Abstract

A set of interior simulation experiments for quicksand were designed , which were carried out to study the law of flow and block for sand with different particle sizes and different water content from loose level which flow through the broken rocks above coal seam. The relation was obtained , which was between speed ,total amount of quicksand and particle size of sand, water content of sand, channel size of broken rocks. The displacement time curve of sand column was fitted into linear function, polynomial function or exponential function. A mechanical model was established to analyze the transport mechanism of sand with different conditions flowing through the broken rocks. And the factors that affect the flow and block of sand were analyzed. Experiment results shows: when dry sand flows through the broken rocks, it is uniform and do not form block generally; wet sand almost all form block; all the mixed flow of water and sand occurs inrush of sand , and when the water level get lower than sand surface, it becomes wet sand and the inrush of sand get finished. In broken rocks, it is a prerequisite for the occurrence of quicksand that the water level in the aquifer is higher than the surface of sand. However, with such a condition of quicksand, the key factor on the speed and the amount of quicksand is the channel size. The study indicates that the establishment of mechanical model for macro analysis can explain the migration mechanism of the mixed flow of water and sand through the broken rocks.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Delong Liu
AU  - Chen Chen
AU  - Wanghua Sui
PY  - 2015/11
DA  - 2015/11
TI  - Simulation Experimental Study on Flow and Block of the Mixed Flow of Water and Sand through the Broken Zone of Rocks
BT  - Proceedings of the 2015 International Conference on Architectural, Civil and Hydraulics Engineering
PB  - Atlantis Press
SP  - 214
EP  - 219
SN  - 2352-5401
UR  - https://doi.org/10.2991/icache-15.2015.44
DO  - 10.2991/icache-15.2015.44
ID  - Liu2015/11
ER  -