Version 1
: Received: 16 November 2016 / Approved: 16 November 2016 / Online: 16 November 2016 (13:06:39 CET)
Version 2
: Received: 23 January 2017 / Approved: 23 January 2017 / Online: 23 January 2017 (09:15:34 CET)
Version 4
: Received: 24 January 2017 / Approved: 25 January 2017 / Online: 25 January 2017 (03:46:33 CET)
How to cite:
Ren, F.; Liu, Y.; Cao, J.; He, R.; Xu, Y.; You, X.; Zhou, Y. A Two-phase Model of Air Shock Wave Induced by Rock-fall in Closed Goaf. Preprints2016, 2016110083. https://doi.org/10.20944/preprints201611.0083.v1
Ren, F.; Liu, Y.; Cao, J.; He, R.; Xu, Y.; You, X.; Zhou, Y. A Two-phase Model of Air Shock Wave Induced by Rock-fall in Closed Goaf. Preprints 2016, 2016110083. https://doi.org/10.20944/preprints201611.0083.v1
Ren, F.; Liu, Y.; Cao, J.; He, R.; Xu, Y.; You, X.; Zhou, Y. A Two-phase Model of Air Shock Wave Induced by Rock-fall in Closed Goaf. Preprints2016, 2016110083. https://doi.org/10.20944/preprints201611.0083.v1
APA Style
Ren, F., Liu, Y., Cao, J., He, R., Xu, Y., You, X., & Zhou, Y. (2016). A Two-phase Model of Air Shock Wave Induced by Rock-fall in Closed Goaf. Preprints. https://doi.org/10.20944/preprints201611.0083.v1
Chicago/Turabian Style
Ren, F., Xi You and Yanjun Zhou. 2016 "A Two-phase Model of Air Shock Wave Induced by Rock-fall in Closed Goaf" Preprints. https://doi.org/10.20944/preprints201611.0083.v1
Abstract
In this paper, a two-phase model of air shock wave induced by rock-fall in closed goaf was proposed. The model was made up of the uniform motion phase (velocity was close to 0 m•s-1) and the acceleration movement phase. The uniform motion phase was determined by experience and the acceleration movement phase was derived by the theoretical analysis. After this, a series of experiments were performed to verify the two-phase model and obtained the law of the uniform motion phase. By observing, the acceleration movement phase was taking a larger portion and the uniform motion phase was smaller when height of rock-fall was higher. By comparison, experimental results of different falling heights showed good agreements with theoretical analysis, which verifies the effectiveness of the two-phase model. Finally, the model was tested with computational fluid dynamics (CFD) numerical simulation by three groups of different falling height. The two-phase model could provide a reference and basis for estimating the air shock waves' velocity and design the protective measures.
Keywords
air shock wave; rock-fall; two-phase model; computational fluid dynamics (CFD)
Subject
Physical Sciences, Fluids and Plasmas Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
