All Issue

2018 Vol.28, Issue 5 Preview Page
October 2018. pp. 476-492
Abstract

본 연구에서는 한반도 남부 지역에서 취득 가능한 응회암, 현무암, 섬록암 시험편에 대하여 다양한 실내시험을 수행하였다. 건조/포화 조건으로 대별하여 실내실험을 수행했으며 이를 바탕으로 포화에 따른 암석 물성변화를 실험적으로 고찰하였다. 실험결과, 비교적 공극률이 작은 시험편을 대상으로 했음에도 불구하고 확연한 강도 저하와 변형 특성 변화가 관찰되었다. 실험결과를 바탕으로 암석의 주요 역학적 물성인 일축압축강도, 탄성계수, 간접인장강도를 예측할 수 있는 회귀모델을 구성하였다. 비파괴 물성인 P파 속도, Shore 경도를 독립변수로 이용하였으며 그 결과 만족할 만한 수준의 물성 예측 모델이 구성되었음을 확인하였다.

In this study, various laboratory experiments were conducted on tuff, basalt and diorite specimens, which were obtained in the southern part of Korean Peninsula. Experiments were performed under dry and water saturated conditions. Results showed that strength degradation and change of deformation characteristics were remarkable although the specimens had small porosity. Based on the results, regression models that are capable of predicting important mechanical rock properties, such as uniaxial compressive strength, Young’s modulus, Brazilian tensile strength were proposed. P-wave velocity and Shore hardness were selected as independent variables and the results showed satisfactory prediction performance for the experimental data collected in this study.

References
  1. Broch, E., 1979, Changes in rock strength caused by water. Proceeding of 4th ISRM Congress, Montreux. 71-75.
  2. Burshtein, L., 1969, Effect of moisture on the strength and deformability of sandstone. Journal of Mining Science, 5(5). 573-576.
  3. Duperret, A., Taibi, S., Mortimore, R.N., 2005, Effect of groundwater and sea weathering cycles on the strength of chalk rock from unstable coastal cliffs of NW France. Engineering Geology, 78(3), 321-343.10.1016/j.enggeo.2005.01.004
  4. Dyke, C. and Dobereiner, L., 1991, Evaluating the strength and deformability of sandstones. Quarterly Journal of Engineering Geology and Hydrogeology, 24(1), 123-134.10.1144/GSL.QJEG.1991.024.01.13
  5. Erguler, Z. and Ulusay, R., 2009, Water-induced variations in mechanical properties of clay-bearing rocks. International Journal of Rock Mechanics and Mining Sciences, 46(2), 355-370.10.1016/j.ijrmms.2008.07.002
  6. Feda, J., 1966, The influence of water content on the behavior of subsoil, formed by highly weathered rocks. Proceedings of 1st ISRM Congress, Lisbon, 283-288
  7. Hawkins, A. and McConnell, B., 1992, Sensitivity of sandstone strength and deformability to changes in moisture content. Quarterly Journal of Engineering Geology and Hydrogeology, 25(2), 115-130.10.1144/GSL.QJEG.1992.025.02.05
  8. Heo, J., Lee. C., Seo, J., Park, S., Park, J., Kwon, S., 2014, Variation of thermal and mechanical properties of crystalline granite under saturated-loading condition. Tunnel & Underground Space, 24(3), 224-23310.7474/TUS.2014.24.3.224
  9. ISRM, 2007, The complete ISRM suggested methods for rock characterization, testing and monitoring : 1974-2006. ISRM Commission on Testing Methods.
  10. Jaeger, J.C., Cook, N.G.W., 2007, Zimmerman, R., Fundamental of rock mechanics. 4th edition, Wiley-Blackwell, Singapore.
  11. Jung, W., 2010, Effects of strain rate and water saturation on the tensile strength of rocks, Tunnel & Underground Spae, 20(2), 119-124
  12. King, M., 1983, Static and dynamic elastic properties of rocks from the Canadian Shield. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 20(5), 237-241.10.1016/0148-9062(83)90004-9
  13. KSRM, 2010, Suggested methods for rock testing, KSRM commission on testing methods, CIR, Korea, Li, Z., and Reddish, D., 2004, The effect of groundwater recharge on broken rocks. International Journal of Rock Mechanics and Mining Science, 41(3), 280-285
  14. Li, D., Wong, L.N.Y., Liu, G., Zhang, X., 2012, Influence of water content and anisotropy on the strength and deformability of low porosity meta-sedimentary rocks under triaxial compression. Engineering Geology, 126, 46-66.10.1016/j.enggeo.2011.12.009
  15. Nur, A. and Simmons G., 1969, The effect of saturation on velocity in low porosity rocks. Earth and Planetary Science Letters, 7(2), 183-193.10.1016/0012-821X(69)90035-1
  16. Romana, M. and Vásárhelyi, B., 2007, A discussion on the decrease of unconfined compressive strength between saturated and dry rock samples. Proceedings of 11th ISRM Congress, Lisboa, 139-142.
  17. Sasaki, T., Kinoshima, A., Ishijima, G., 1981, A study on water-sensitivity of argillaceous rock. Proceedings of ISRM International Symposium on Weak Rock, Tokyo, 149-154.7329436
  18. Török, A. and Vásárhelyi, B., 2010, The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Engineering Geology, 115(3), 237-245.10.1016/j.enggeo.2010.01.005
  19. Van Eeckhout, E. M. and Peng, S.S., 1975, The effect of humidity on the compliances of coal mine shales, International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 12, 335-340.10.1016/0148-9062(75)90166-7
  20. Van Eeckhout, E. M., 1976, The mechanisms of strength reduction due to moisture in coal mine shales. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 13, 61-6710.1016/0148-9062(76)90705-1
  21. Vásárhelyi, B. and Ledniczky K., 1999, Influence of water-saturation and weathering on mechanical properties of Sivac marble. Proceedings of 9th ISRM Congress, Paris, 691-693
  22. Vásárhelyi, B., 2002, Influence of the water saturation on the strength of volcanic tuffs. EUROCK 2002, Proceedings of Workshop on volcanic rocks, 89-96
  23. Vásárhelyi, B., 2003, Some observations regarding the strength and deformability of sandstones in dry and saturated conditions. Bulletin of Engineering Geology and the Environment, 62(3), 245-249.10.1007/s10064-002-0186-x
  24. Vásárhelyi, B., 2005, Statistical analysis of the influence of water content on the strength of the Miocene limestone. Rock Mechanics and Rock Engineering, 38(1), 69-76.10.1007/s00603-004-0034-3
  25. Vásárhelyi, B. and Ván, P., 2006, Influence of water content on the strength of rock. Engineering Geology, 84(1), 70-74.10.1016/j.enggeo.2005.11.011
  26. Wiid, B., 1970, The influence of moisture on the pre-rupture fracturing of two rock types. Proceedings of 2nd International Conference of Rock Mechanics, Belgrade, 239-245.
  27. Yang, C., Mao, H., Huang, X. and Wang, X., 2006 Study on the variation on micostructure and mechanical properties of water-weakening slates, Proceedings of EUROCK 2006, Liege, 173-182
  28. Yilmaz, I., 2010, Influence of water content on the strength and deformability of gypsum. International Journal of Rock Mechanics and Mining Sciences, 47(2), 342-347.10.1016/j.ijrmms.2009.09.002
  29. Yu, Y., Zhang, J., Zhang, J., 2009, A modified Brazilian disk tension test. International Journal of Rock Mechanics and Mining Sciences, 46(2), 421-425.10.1016/j.ijrmms.2008.04.008
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 : 28
  • No :5
  • Pages :476-492
  • Received Date :2018. 10. 12
  • Accepted Date : 2018. 10. 27