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2026 Vol.36, Issue 2 Preview Page

Original Article

Influence of Water Saturation on Rock Cutting Characteristics of Pick Cutter by Linear Cutting Test

선형절삭시험을 이용한 암석의 포화에 따른 픽 커터 절삭특성 평가

Gyeong-Min Ki1
,
Minsung Park2
,
Minseok Ju3
,
Hyunsik Kim4
,
Hoyoung Jeong5*
기 경민1
,
박 민성2
,
주 민석3
,
김 현식4
,
정 호영5*
1Staff, Hoban TBM
2Staff, Dasan Consultant
3Ph.D Student, Department of Energy Resources Engineering, Pukyong National University
4MS Student, Department of Energy Resources Engineering, Pukyong National University
5Associate Professor, Department of Energy Resources Engineering, Pukyong National University
1호반TBM 주임
2다산컨설탄트 사원
3부경대학교 에너지자원공학과 박사과정
4부경대학교 에너지자원공학과 석사과정
5부경대학교 에너지자원공학과 부교수
*Corresponding Author
30 April 2026. pp. 130-148
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Abstract

This study was conducted to evaluate changes in rock cutting characteristics of a pick cutter under dry and saturated conditions. Linear cutting tests were performed on Macheon granite in Korea. The tests were conducted under dry and saturated conditions by varying the depth of cut and the spacing-to-depth of cut ratio (s/d), and the cutting force, specific energy, and fragment size distribution were analyzed. The results showed a general trend of increasing cutting and normal forces with depth of cut and s/d for all conditions. The acting forces and specific energy measured under saturated conditions were consistently lower than those under dry conditions. These findings indicated that even for low-porosity granite, rock cutting characteristics can change significantly with limited water infiltration. The fragment size distribution also exhibited clear differences between dry and saturated conditions, indicating a relative shift toward coarser fragments under saturated conditions.

Keywords
Linear cutting test
Pick cutter
Saturated condition
Cutting force
Specific energy
Particle size distribution

본 연구는 건조 및 포화 조건에서 픽 커터의 암석 절삭특성 변화를 평가하기 위해 수행되었다. 국내 마천화강암을 대상으로 선형절삭시험을 수행하였으며, 건조 조건과 포화 조건으로 구분하여 관입깊이와 절삭간격-관입깊이비(s/d)를 변화시키면서 절삭하중, 비에너지, 파쇄암편의 입도분포 특성을 분석하였다. 시험 결과, 모든 조건에서 관입깊이와 s/d가 증가함에 따라 절삭하중과 수직하중이 증가하는 일반적인 경향이 확인되었다. 포화 조건의 절삭하중과 비에너지는 건조 조건 대비 전반적으로 낮게 나타났으며, 이러한 결과는 공극률이 낮은 화강암에서도 제한적 수분 침투만으로 절삭특성이 유의하게 변화할 수 있음을 시사한다. 암편의 입도분포 역시 건조 및 포화 조건에서 뚜렷한 차이를 보였으며, 포화 조건에서 암편의 전반적인 크기가 상대적으로 커지는 경향이 확인되었다.

키워드
선형절삭시험
픽 커터
포화 조건
절삭하중
비에너지
입도분포
References
1

Abu Bakar, M.Z., and Gertsch, L.S., 2013, Evaluation of saturation effects on drag pick cutting of a brittle sandstone from full scale linear cutting tests, Tunn. Undergr. Sp. Technol., 34, 124-134.

10.1016/j.tust.2012.11.009
2

Abu Bakar, M.Z., Gertsch, L.S., and Rostami, J., 2014, Evaluation of fragments from disc cutting of dry and saturated sandstone, Rock Mech. Rock Eng., 47(5), 1891-1903.

10.1007/s00603-013-0482-8
3

Bilgin, N, Demircin, M.A., Copur, H., Balci, C., and Tuncdemir., H., 2006, Dominant rock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results, Int. J. Rock Mech. Min. Sci., 43(1), 139-156.

10.1016/j.ijrmms.2005.04.009
4

Chang, S.H., Kang, T.H., Lee, C., Jeong, H., and Choi, S.W., 2023, Correlation Analysis of Cutter Acting Force and Temperature During the Linear Cutting Test Accompanied by Infrared Thermography, Tuun. Undergr. Sp., 33(6), 519-533.

5

Choi, S.B., Lee, S., and Jeon, S., 2018, Experimental Study on the Change of rock properties due to water saturation, Tunn. Undergr. Sp., 28(5), 476-492.

6

Choi, S.W., Chang, S.H., Lee, C., Kang, T.H., and Jeong, H., 2024, Field Applicability of Coated Conical Pickcutters through Cutter Force and Wear Damage Analysis, Tuun. Undergr. Sp., 34(5), 554-570.

7

Choi, S.W., Chang, S.H., Park, Y.T., and Lee, G.P., 2014, Performance estimation of conical picks with slim design by the linear cutting test (I): depending on attack angle variation, J. of Korean Tunn. Undergr. Sp. Assoc., 16(6), 573-584.

10.9711/KTAJ.2014.16.6.573
8

Colback, P.S.B. and Wild, B.L., 1965, The influence of moisture content on the compressive strength, In: Proceedings of the 3rd Canadian Rock Mechanics Symposium, Toronto, Canada, 65-83.

9

Copur, H., Bilgin, N., Balci, C., Tumac, D., and Avunduk, E., 2017. Effects of Different Cutting Patterns and Experimental Conditions on the Performance of a Conical Drag Tool. Rock Mech. Rock Eng.

10.1007/s00603-017-1172-8
10

Erguler, Z.A. and Ulusay, R., 2009, Water-induced variations in mechanical properties of clay-bearing rocks, Int. J. Rock Mech. Min. Sci., 46(2), 355-370.

10.1016/j.ijrmms.2008.07.002
11

ISRM, 2007, The complete ISRM suggested methods for rock characterization, testing and monitoring : 1974-2006. ISRM Commission on Testing Methods.

12

Jaeger, J.C., Cook, N.G.W., and Zimmerman, R., 2007, Fundamentals of rock mechanics. 4th edition, Wiley-Blackwell, Singapore.

13

Jeong, H., Choi, S., and Jeon, S., 2020, Effect of skew angle on the cutting performance and cutting stability of point-attack type picks, Tunn. Undergr. Sp. Technol., 103, 103507.

10.1016/j.tust.2020.103507
14

Jeong, H., Choi, S., and Lee, Y.K., 2023, Evaluation of Cutting Performance of a TBM Disc Cutter and Cerchar Abrasivity Index Based on the Brittleness and Properties of Rock, Appl. Sci., 13(4), 2612.

10.3390/app13042612
15

Jeong, H., and Jeon, S., 2018. Characteristic of size distribution of rock chip produced by rock cutting with a pick cutter. Geomech. Eng., 15(3), 811-822.

10.12989/GAE.2018.15.3.811
16

Karakul, H. and Ulusay, R., 2013, Empirical correlations for predicting strength properties of rocks from P-wave velocity under different degrees of saturation, Rock Mech. Rock Eng., 46, 981-999.

10.1007/s00603-012-0353-8
17

KSRM, 2010, Suggested methods for rock testing, KSRM commission on testing methods, CIR, Korea.

18

Li, D. and Wang, W., 2019, Quantitative analysis of the influence of saturation on rock strength reduction considering the distribution of water, Geomech. Geophys. Geo-energ. Geo-resour., 5, 197-207.

10.1007/s40948-019-00106-3
19

Luo, Y., 2020, Influence of water on mechanical behavior of surrounding rock in hard-rock tunnels: an experimental simulation, Eng. Geol., 277, 105816.

10.1016/j.enggeo.2020.105816
20

Mammen, J., Saydam, S., and Hagan, P., 2009. A study on the effect of moisture content on rock cutting performance. In: Aziz N. (Ed.), Proceedings of the Coal Operators Conference, University of Wollongong and Australian Institute of Mining and Metallurgy, 340, 347.

21

Park, J.Y., Kang, H., Lee, J.W., Kim, J.H., Oh, J.Y., Cho, J.W., Rostami, J., and Kim, H.D., 2018. A study on rock cutting efficiency and structural stability of a point attack pick cutter by lab-scale linear cutting machine testing and finite element analysis. Int. J. Rock Mech. Min. Sci., 103, 215-229.

10.1016/j.ijrmms.2018.01.034
22

Roxborough, F. and Rispin, A., 1973, Mechanical cutting characteristics of lower chalk, Tunnels & Tunnelling International, 5(3), 261-274.

23

Tuncdemir, H., Bilgin, N., Copur, H., and Balci, C., 2008, Control of rock cutting efficiency by muck size, Int. J. Rock Mech. Min. Sci., 45(2), 278-288.

10.1016/j.ijrmms.2007.04.010
24

Wong, L.N.Y., and Jong, M.C., 2014, Water saturation effects on the brazilian tensile strength of gypsum and assessment of cracking processes using high-speed video, Rock Mech. Rock Eng., 47, 1103-1115.

10.1007/s00603-013-0436-1
25

Zhang, C., Bai, Q., Han, P., Wang, L., and Wang, X., 2023, Strength weakening and its micromechanism in water-rock interaction, a short review in laboratory tests. Int. J. Coal Sci. Technol., 10, 10.

10.1007/s40789-023-00569-6
26

Zhou, Z., Cai, X., Cao, W., and Xiong, C., 2016, Influence of water content on mechanical properties of rock in both saturation and drying processes, Rock Mech. Rock Eng., 49, 3009-3025.

10.1007/s00603-016-0987-z
Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 36
  • No :2
  • Pages :130-148
  • Received Date : 2026-03-14
  • Revised Date : 2026-04-02
  • Accepted Date : 2026-04-03
  • DOI :https://doi.org/10.7474/TUS.2026.36.2.130
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