Mechanism of rock breaking by pick assisted with water jet of different modes

다국어 초록 (Multilingual Abstract)

In the rock breaking progress, the resistant force results in tools failure and the low cutting efficiency, thus, it is necessary to reduce thefailure of tools and enhance the efficiency of cutting and drilling. In this paper, different configuration modes of water jet were presentedto solve this issue. Moreover, the symmetrical pre-split finite element models for rock breaking by pick without water jet and picks assistedwith different configuration modes of water jet were established to analyze the effect of different configuration modes on rockstress distribution and pick cutting forces. Finally, the experiments were conducted to validate the theory analysis. The results indicatethat the cutting force decreasing rate of JCP is maximum all the time under the same conditions compared with the decreasing rate of JSPand JFP; and the numerical results were consistent with the numerical, which verifies the correctness of theory analysis.

참고문헌 (Reference)

1 X. F. Yang, "Wear characteristics of the cemented carbide blades in drilling limestone with water jet" 29 : 320-325, 2011

2 O. Fenn, "The use of water jet to assist free-rolling cutters in the excavation of hard rock" 4 (4): 409-417, 1989

3 S. Dehkhoda, "The internal failure of rock samples subjected to pulsed water jet impacts" 66 : 91-96, 2014

4 N. Careddu, "Technical-economic assessment of stone slabs surface finishing using water jet technology" 71 : 1991-2001, 2014

5 Soo-Hong Lee, "Study on droplet formation with surface tension for electrohydrodynamic" 대한기계학회 26 (26): 1403-1408, 2012

6 P. L. Menezes, "Studies on the formation of discontinuous rock fragments during cutting operation" 71 : 131-142, 2014

7 S. Y. Liu, "Rock breaking of conical cutter with assistance of front and rear water jet" 42 : 78-86, 2014

8 S. Y. Liu, "Rock breaking by conical pick assisted with high pressure water jet" 2014

9 S. Y. Liu, "Research on the cutting force of a pick" 19 (19): 514-517, 2009

10 G. Aydin, "Recycling of abrasives in abrasive water jet cutting with different types of granite" 15 : 278-282, 2014

11 G. Y. Peng, "Progress in numerical simulation of cavitating water jets" 25 (25): 502-509, 2013

12 D. Z. Song, "Numerical simulation of rock-burst relief and prevention by water-jet cutting" 70 : 318-331, 2014

13 H. X. Jiang, "Numerical simulation of rock fragmentation under t he impact load of water jet" 2014

14 O. Su, "Numerical simulation of rock cutting using the discrete element method" 48 (48): 434-442, 2011

15 V. Sharma, "Multi response optimization of process parameters based on Taguchi-Fuzzy model for coal cutting by water jet technology" 56 : 1019-1025, 2011

16 X. H. Liu, "Interference model of conical pick in cutting process" 16 (16): 115-128, 2014

17 R. Ciccu, "Improvement of the excavation performance of PCD drag tools by water jet assistance" 43 : 465-474, 2010

18 R. Ciccu, "Improvement of disc cutter performance by water jet assistance" 47 : 733-744, 2014

19 Y. Y. Lu, "Hard rock drilling technique with abrasive water jet assistance" 60 : 47-56, 2013

20 T. Yu, "Finite element modeling of confined concrete-I:Drucker-Prager type plasticity model" 32 (32): 665-679, 2010

21 M. Z. A. Bakar, "Evaluation of saturation effects on drag pick cutting of a brittle sandstone from full scale linear cutting tests" 34 : 124-134, 2013

22 N. Bilgin, "Dominant rock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results" 43 : 139-156, 2006

23 W. G. Van, "Discrete element simulation of tribological interactions in rock cutting" 65 : 8-19, 2014

24 J. Rojek, "Discrete element simulation of rock cutting," 48 : 996-1010, 2011

25 R. Gryc, "Correlation of pure and abrasive water jet cutting of rocks" 65 : 149-152, 2014

26 Y. Ozcelik, "Comparison of the water jet and some traditional stone surface treatment methods in different lithotypes" 25 : 678-687, 2011

27 X. H. Liu, "Coal fragment size model in cutting process" 272 : 282-289, 2015

28 Wonho Kim, "Atomization characteristics of emulsified fuel oil by instant emulsification" 대한기계학회 26 (26): 1781-1791, 2012

29 Gulay Cosansu, "An investigation on use of colemanite powder as abrasive in abrasive waterjet cutting (AWJC)" 대한기계학회 26 (26): 2371-2380, 2012

30 S. Dehkhoda, "An experimental study of surface and sub-surface damage in pulsed water-jet breakage of rocks" 63 : 138-147, 2013

31 Yoon Kee Kim, "An experimental and numerical study on hydrodynamic characteristicsof horizontal annular type water-air ejector" 대한기계학회 26 (26): 2773-2781, 2012

32 S. C. Crow, "A theory of hydraulic rock cutting" 10 : 567-584, 1973

33 G. Rehbinder, "A theory about cutting rock with a water jet" 12 : 247-257, 1980

34 Y. Ozcelik, "A study of nozzle angle in stone surface treatment with water jets" 25 : 4271-4278, 2011

35 R. M. Goktan, "A semi-empirical approach to cutting force prediction for point-attack picks" 105 : 257-263, 2005