Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Effect of abrasive waterjet parameters on rock removal

연마재 워터젯 변수가 암석제거에 미치는 영향

  • Received : 2012.07.13
  • Accepted : 2012.07.25
  • Published : 2012.07.31
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Abstract

Rock excavation (removal) tests are performed with effective parameters using an abrasive waterjet. For verification of the field rock excavation capabilities, the removal performance and level of efficiency are analyzed for hard granite rock in terms of the water pressure, exposure time of the jet, and the standoff distance. In particular, experimental tests are performed with a long standoff distance required condition in the real excavation field. The rock removal performance level changes according to the rock properties. In this study, various rock specimens are used and P-wave velocities are measured in order to determine the correlation between the removal performance and the P-wave velocity. As a result of the experimental study, the effect of waterjet parameters on rock removal is analyzed.

연마재 워터젯을 이용하여 다양한 영향변수에 따라 암석시편에 굴착(제거)실험을 수행하였다. 현장암반굴착 가능성을 판단하기 위해 신선한 경암(화강암) 시편을 기준으로 수압, 노출시간, 그리고 이격거리에 따라 굴착성능 및 굴착형상을 분석하였다. 특히 이격거리는 현장에서 요구하는 높은 수준의 조건에서 실험을 실시였다. 추가적으로 암석에 따른 굴착성능을 비교하기 위해, 실제 굴착현장에서 획득한 암석시편을 대상으로 P파 속도를 측정하여 동일한 조건에서 워터젯 실험을 수행하였다. 획득된 실험결과로부터 워터젯 변수가 암반제거에 미치는 영향을 분석하였다.

Keywords

References

  1. 김정근, 박태동 (2003), "워터젯 보조명판이 장착된 마이크로터널링 머신의 효용성에 관한 연구", 한국터널공학회 2003년 정기학술발표회 논문집, pp. 242-256.
  2. 선우춘, 최병희, 류창하 (1994), "超高壓水에 의한 花崗石切削에 대한 硏究", 터널과 지하공간, 제4권, pp. 92-101.
  3. 선우춘, 최병희, 류창하, 권광수 (1996), "Water jet절단에서의 연마재 종류별 성능 비교 시험", 터널과 지하공간, 제6권, pp. 175-183.
  4. 최병희, 양형식 (2001), "워터젯을 이용한 암석의 슬롯절삭에 관한 연구", 대한화약기술학회지, 제19권, pp. 247-258
  5. 홍의준, 장석부, 송기일, 조계춘 (2010), "발파시 터널 숏크리트의 최대입자속도와 부착상태평가 분석", 한국터널공학회 논문집, 제12권, 제3호, pp. 247-255.
  6. 황학, 이태노 (2002), "터널 심발부의 선균열을 이용한 발파공법의 현장시험에 관한 연구", 한국터널공학회 논문집, 제4권, 제4호, pp. 287-300.
  7. Cha, M., Cho, G.C. (2007), "Compression wave velocity of cylindrical rock specimens: engineering modulus interpretation", Japanese Journal of Applied Physics, Vol. 46, No. 7B, pp. 4497-4499. https://doi.org/10.1143/JJAP.46.4497
  8. Evans, A.G., Gulden, M.E., Rosenblatt, M. (1978), "Impact damage in brittle materials in the elastic-plastic response régime", Proc. R. Soc. Lond. Series. A., Vol. 361, pp. 343-365. https://doi.org/10.1098/rspa.1978.0106
  9. Gensheng, L., Zhongwei, H., Jilei, H., Riji, C., Wei, X. (2007), "The productivity-enhancing technique of deep penetrating perforation with a high-pressure water jet", Petroleum Science and Technology, Vol. 25, pp. 289-297. https://doi.org/10.1081/LFT-200056824
  10. Kim, J.G., Song, J.J., Han, S.S., Lee, C.I. (2012), "Slotting of concrete and rock using an abrasive suspension waterjet system", KSCE Journal of Civil Engineering, Vol. 16, No. 4, pp. 571-578. https://doi.org/10.1007/s12205-012-1411-1
  11. Momber, A. (2004), "Wear of rocks by water flow", Rock Mechanics and Mining Sciences, Vol. 41, pp. 51-68. https://doi.org/10.1016/S1365-1609(03)00075-3
  12. Summers, D.A. (1992), "Hydraulic mining: jet-assisted cutting", SME Mining Engineering Handbook, 2ndedition (Ed. H.L. Hartman), Society for Mining, Metallurgy, and Exploration Inc., California, pp. 1918-1929.
  13. Summers, D.A. (1995), Waterjetting Technology, Chapman & Hall, London.
  14. Zeng, J., Kim, T.J. (1996), "An erosion model of polycrystalline ceramics in abrasive waterjet cutting", Wear, Vol. 193, pp. 207-217. https://doi.org/10.1016/0043-1648(95)06721-3

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