Model of loosen blasting assisted by high-pressure water jet spiral-notch

被引：1

作者：

Su D.-F. ^{[1
]}

Kang Y. ^{[1
,2
]}

Wang X.-C. ^{[1
,2
]}

Zheng D.-D. ^{[3
]}

机构：

[1] State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing

[2] Hubei Key Laboratory of Waterjet Theory & New Technology, Wuhan University, Wuhan

[3] Sichuan Guotaiminan Science and Technology Co.,Ltd, Chengdu

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2016年 / 37卷 / 12期

关键词：

ANSYS/LS-DYNA; Loosen blasting; Spiral notch; Stress field; Water jet;

D O I：

10.3969/j.issn.1005-3026.2016.12.023

中图分类号：

学科分类号：

摘要：

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. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.

引用

页码：1778 / 1783

页数：5

共 14 条

[1]

Zhu W.C., Wei C.H., Li S., Et al., Numerical modeling on destress blasting in coal seam for enhancing gas drainage, International Journal of Rock Mechanics & Mining Sciences, 59, pp. 179-190, (2013)

[2]

Lu Y.Y., Liu Y., Li X.H., Et al., A new method of drilling long boreholes in low permeability coal by improving its permeability, International Journal of Coal Geology, 84, 2, pp. 94-102, (2010)

[3]

Sanchidrian J.A., Lopez L.M., Segarra P., The influence of some blasting techniques on the probability of ignition of firedamp by permissible explosives, Journal of Hazardous Materials, 155, 3, pp. 580-589, (2008)

[4]

Liu J.C., Wang H.T., Yuan Z.G., Et al., Experimental study of presplitting blasting enhancing pre-drainage rate of low permeability heading face, Procedia Engineering, 26, pp. 818-823, (2011)

[5]

Guo D.-Y., Song W.-J., Li Z.-Z., Et al., Research on splitting technical of coal bed deep-hole cumulative blasting to improve peimeability, Journal of China Coal Society, 34, 8, pp. 1086-1089, (2009)

[6]

Wu X.-H., Apptication of deep loosening blasting technology in preventing coal and gas out bursting, Coal Mining Technology, 12, 2, pp. 76-77, (2007)

[7]

Zheng Z.-L., Study on the failed mechanism and experiment of spiral notch-holes blasting, pp. 1-117, (2003)

[8]

Nateghi R., Kiany M., Gholipouri O., Control negative effects of blasting waves on concrete of the structures by analyzing of parameters of ground vibration, Tunnelling and Underground Space Technology, 24, 6, pp. 608-616, (2009)

[9]

Donze F.V., Bouchez J., Magnier S.A., Modeling fractures in rock blasting, International Journal of Rock Mechanics and Mining Sciences, 34, 8, pp. 1116-1153, (1997)

[10]

Atkinson B.K., Fracture Mechanics Of Rock, (1987)

← 1 2 →