Model of Loosen Blasting Assisted by High-Pressure Water Jet Spiral-Notch

doi:10.12068/j.issn.1005-3026.2016.12.023

Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (12): 1778-1783.DOI: 10.12068/j.issn.1005-3026.2016.12.023

• Resources & Civil Engineering • Previous Articles Next Articles

Model of Loosen Blasting Assisted by High-Pressure Water Jet Spiral-Notch

SU Deng-feng¹， KANG Yong^1,2， WANG Xiao-chuan^1,2， ZHENG Dan-dan³

1.State Key Laboratory of Coal Mine Disaster Dynamics and Control， Chongqing University， Chongqing 400030， China; 2. Hubei Key Laboratory of Waterjet Theory & New Technology， Wuhan University， Wuhan 430072， China; 3. Sichuan Guotaiminan Science and Technology Co.，Ltd， Chengdu 610100， China.

Received:2015-08-25 Revised:2015-08-25 Online:2016-12-15 Published:2016-12-23
Contact: KANG Yong
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Abstract

Abstract: A new technology of loosen blasting assisted by high-pressure water jet spiral-notch was put forward based on its unique advantages of water jet cutting， and the geometric model for water jet notched boreholes was established based on experiments. Furthermore， by employing fracture mechanics and Westergaard stress function method， the functions of complex variables was confirmed， and the stress field acted upon the spirally water jet notching borehole by quasi-static explosion gas was derived. The stress intensity factor of spiral-notch boreholes with high-pressure water jet was determined， and the loosening effect of loosen blasting assisted by high-pressure water jet spiral-notch was also analyzed. Finally， ANSYS/LS-DYNA was applied to verify the theoretical model， and the results of the numerical simulation are almost comparable to the model.

Key words: water jet, spiral notch, loosen blasting, stress field, ANSYS/LS-DYNA

CLC Number:

U455.6

SU Deng-feng， KANG Yong， WANG Xiao-chuan， ZHENG Dan-dan. Model of Loosen Blasting Assisted by High-Pressure Water Jet Spiral-Notch[J]. Journal of Northeastern University Natural Science, 2016, 37(12): 1778-1783.

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Model of Loosen Blasting Assisted by High-Pressure Water Jet Spiral-Notch

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