Browse > Article
http://dx.doi.org/10.9711/KTAJ.2021.23.6.589

Analysis of drilling performance and shape for granite according to operating parameters of waterjet nozzles  

Park, Jun-Sik (Dept. of Civil and Environmental Engineering, Pusan National University (PNU))
Cha, Hyun-Jong (Dept. of Civil and Environmental Engineering, Pusan National University (PNU))
Hong, Eun-Soo (HBC INC.)
Jun, Hyung-Woo (Jeyoung Engineering & Construction)
Oh, Tae-Min (Dept. of Civil and Environmental Engineering, Pusan National University (PNU))
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.23, no.6, 2021 , pp. 589-604 More about this Journal
Abstract
Waterjets for rocks have various advantages of the non-contact and eco-friendly excavation using only water and abrasive. To overcome the problems (e.g., dust and noise occurrence) of the conventional drilling methods, waterjet excavation methods are broadly used. It is advantageous to operate a couple of nozzles in order to increase the waterjet excavation efficiency. When multiple nozzles are used, it is essential to analyze the excavation performance and shape according to the nozzle operation method. In this study, nozzle angle, horizontal distance between nozzles, and standoff distance were defined as nozzle operating parameters and the excavation performance and shape were analyzed. As a result of the experiment, when the nozzle angle and standoff distance are increased, the excavation depth is decreased and the effective depth tends to be increased. In addition, based on the experimental results, the excavation shape criteria required for nozzle insertion were proposed and optimal nozzle operating parameters were derived according to the criteria. This study result is expected to be used as useful basic research in the future development of multiple waterjet nozzles for rock drilling.
Keywords
Waterjet drilling; Granite; Nozzle operating parameter; Excavation shape; Excavation performance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Momber, A.W. (2016), "The response of geo-materials to high-speed liquid drop impact", International Journal of Impact Engineering, Vol. 89, pp. 83-101.   DOI
2 Momber, A.W., Kovacevic, R. (2012), "Principles of abrasive water jet machining", Springer Science & Business Media, pp. 89-162.
3 Oh, T.M., Cho, G.C. (2012), "Effects of geometric parameters of a combined nozzle for rock cutting using an abrasive waterjet", Journal of Korean Tunnelling and Underground Space Association, Vol. 14, No. 5, pp. 517-528.   DOI
4 Oh, T.M., Cho, G.C. (2016), "Rock cutting depth model based on kinetic energy of abrasive waterjet", Rock Mechanics and Rock Engineering, Vol. 49, No. 3, pp. 1059-1072.   DOI
5 Oh, T.M., Park, D.Y., Park, J.S., Cho, G.C. (2021), "Analysis of rock removal shape according to overlapping width of waterjet cutting", Journal of Korean Tunnelling and Underground Space Association, Vol. 23, No. 3, pp. 167-181.   DOI
6 Perrott, C.M. (1979), "Tool materials for drilling and mining", Annual Review of Materials Science, Vol. 9, No. 1, pp. 23-50.   DOI
7 Ren, F., Fang, T., Cheng, X. (2020), "Study on rock damage and failure depth under particle water-jet coupling impact", International Journal of Impact Engineering, Vol. 139, 103504.   DOI
8 Shin, J.H., Choi, G.C., Moon, H.K., Kim, T.G. (2009), "Evaluation of the blast-restriction zone to secure tunnel lining safety", Journal of Korean Tunnelling and Underground Space Association, Vol. 11, No. 1, pp. 85-95.
9 Kim, J.G., Park, T.D. (2003), "A study on the driving performance of the microtunneling machine with a rotating water jet cutterhead", Korea Institute of Information and Telecommunication Facilities Engineering, pp. 367-372.
10 Lu, Y., Tang, J., Ge, Z., Xia, B., Liu, Y. (2013), "Hard rock drilling technique with abrasive water jet assistance", International Journal of Rock Mechanics and Mining Sciences, Vol. 60, pp. 47-56.   DOI
11 Plinninger, R.J. (2008), "Abrasiveness assessment for hard rock drilling", Geomechanik und Tunnelbau, Vol. 1, No. 1, pp. 38-46.   DOI
12 Anwar, S. (2013), Modelling of abrasive waterjet milled footprints, Ph.D. Thesis, University of Nottingham, pp. 1-6.
13 Liu, S., Li, H., Chang, H. (2017), "Drilling performance of rock drill by high-pressure water jet under different configuration modes", Shock and Vibration, Vol. 2017, pp. 1-14.
14 Nakano, K., Okada, S., Furukawa, K., Nakagawa, K. (1993), "Vibration and cracking of tunnel lining due to adjacent blasting", Doboku Gakkai Ronbunshu, Vol. 1993, No. 462, pp. 53-62.
15 Oh, T.M., Cho, G.C., Song, K.I., Ji, I.T. (2012), "A new rock excavation method with an abrasive waterjet to minimized excavation damaged zone", World Tunnel Congress WTC, pp. 340-341.