A Study on the Hydraulic Modelling of the Rockmass in a Limestone Mine

doi:10.12972/ksmer.2013.50.1.113

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2013 Vol.50, Issue 1 Preview Page Next Page

Research Paper

A Study on the Hydraulic Modelling of the Rockmass in a Limestone Mine 석회석광산 주변 암반의 수리학적 모델링에 관한 연구: 김동휘·김경만·최영섭·백환조
Dong-Hui Kim, Gyoung-Man Kim, Young-Sup Choi and Hwanjo Baek

28 February 2013. pp. 113-123

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Abstract

Analysis of groundwater flow is a key aspect especially for excavations of tunnels and underground caverns. In this study, a three-dimensional joint model based on the stochastic method has been adopted for analyzing the influence of rock fractures on the hydraulic properties of rockmasses in a limestone mine. For three-dimensional discrete fracture network (DFN) modelling of the rockmass, both scanline and window surveys were performed to collect the field data, including the orientation, size, length, intensity of rock fractures. Fracture properties retrieved from the statistical analysis of the field data were adopted for the FracMan/MAFIC to analyze the inflow flux through the rockmass around mine tunnel, by applying different boundary conditions around the mine tunnel. Also, with varying transmissivity and aperture values, the influence of the hydraulic properties of rock fractures on the inflow flux were analyzed. According to the results, the aperture and transmissivity change, presumably induced by the rockmass disturbance during excavation process will be one of the most important factors influencing the groundwater inflow into the mine tunnel.

Keywords

Rock fractures

Groundwater flow

Discrete fracture network (DFN)

Aperture

Transmissivity

암반 내 터널이나 지하공동 등의 굴착을 위해서는 지하수의 유동해석이 중요한 요소이며, 본 연구에서는 석회석 광산주변의 암반의 수리학적 특성에 대한 암반균열의 영향을 확률론적 방법론에 기반한 삼차원 불연속체 모델링 방법을 적용하여 분석하였다. 암반의 3차원 분열균열망(DFN) 모델링을 위하여 암반균열의 방향성, 크기, 길이, 체적밀도 등의 자료를 조사선법과 조사창법에 의하여 수집하였다. 현장에서 얻은 자료들은 통계처리한 후 지하수 유동해석 프로그램인 FracMan/MAFIC을 구동하여, 갱도주변 암반의 수리지질학적 특성과 경계조건의 변화에 따른 지하수의 갱내 유입량을 추정하였다. 또한, 암반의 투수량계수 및 간극을 변화시키면서 지하수 유입량의 변화를 분석하였으며, 이로부터 투수량계수 및 간극의 변화가 갱도 내부로의 지하수유입에 상당한 영향을 미칠 수 있음을 확인하였다.

키워드

암반균열

지하수유동

분리균열망

간극

투수량계수

References

Bear, J., Tsang, C.F. and Marsily, G., 1993, Flow and Contaminant Transport in Fractured Rock (eds.), Academic Press Inc., 560p.
Einstein, H.H. and Baecher, G.B., 1983, “Probabilistic and statistical methods in engineering geology, Specific methods and examples, Part I: Exploration,” Rock Mechanics and Rock Engineering, Vol. 16, pp. 39-72.
Fisher, R.A., 1953, “Dispersion on Sphere,” Proceeding of the Royal Society of London, A217, pp. 295-305.
Follin, S., Stigsson, M. and Svensson, U., 2006, “Hydrogeologocal DFN modelling using structural and hydraulic data from KLX04,” SKB Report R-06-24.
Go, T.Y., 2001, A Study on Groundwater Flow in Three-Dimensional Networks of Discrete Joints, MS Thesis, Hanyang University, Seoul.
Golder Associates, 1999, User Documentation: FracWorks/95, Discrete Feature for Network Simulator (version 1.3), 130p.
Han, J.S., 1997, Groundwater environment and pollution, Pybook, 1071p.
Kazemi, H., Merrill, K.S., Porterfield, K.L. and Zeman, P.R., 1976, “Numerical Simulation of Water-Oil Flow in Naturally Fractured Reservoirs,” SPE 5719, Transaction AIME, pp. 317-326.
Kim, H.S., Hahn, C., Kim, K.B., Lee, C.J. and Lee, K.K., 1998, A Study on the Characteristics of Groundwater Behavior in Limestone Regions, Water Resources Research Institute, Korea Water Resources Corporation, p. 134
Kim, S.M., 2000, A study on lineament analysis and fracture network simulation in the area of Hoinammyun, Boeungun, MS Thesis, Yonsei University, Seoul.
Kim, T.K. and Lee, H.K., 1994, “Numerical Analysis for Coupling of Groundwater Flow with the Behaviour of Jointed Rocks around a Cavern.” J. of Mineral and Energy Resources, Vol. 31, No. 6, pp. 537-548.
Lee, J.H., 2009, The Difference for Numerical Analysis on Jointed Rock Tunnel, MS Thesis, Jeonnam University, Gwangju.
Lee, W.S., Lee, J.H., KIM, S.J., KIM, H.T. and Huh, D.G., 2005, “Numerical Sensitivity Study on Parameter Affecting Solute Transport through Fractured Media,” J. of Mineral and Energy Resources, Vol. 42, No. 5, pp. 506-512.
Lee, Y.J. and Jung, H.G., 2004, A Report of investigation (limestone, Jeongseon-Imgye area), Korea Resources Corporation.
Long, J.C.S., Karasiki, K., Davey, A., Peterson, J., Landfeld, M., Kemeny, J. and Martel, S., 1991, “Inverse Approach to the Construction of Fracture Hydrology Models Conditioned by Geophysical Data. An Example from the Validation Exercises at Stripa Mine,” International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 28, No. 2-3, pp. 121-142.
Mauldon, M., 1998, “Estimating Mean Fracture Trace Length and Density from Observations in Convex Windows,” Rock Mech. Rock Engrg, Vol. 31, No. 4, pp. 201-216.
Noh, J.H. and Lee, N.K., 2007, “Applied-mineralogical Study on the Grinding Effects and Powder Properties of High-Ca Limestone,” J. of Mineral and Energy Resources, Vol. 44, No. 3, pp. 191-207.
Pahl, P.J., 1981, “Estimating the mean length of discontinuity traces,” International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, Vol. 18, pp. 221-228.
Park, J.S., 2007, Numerical Analysis on Coupled Behavior of Groundwater Flow around Excavation Damaged Zone in Discontinuous Rock Mass, MS Thesis, Seoul University, Seoul.
Priest, S.D., 1993, Discontinuuity Analysis of Rock Engineering, Chapman & Hall, 473p.
Seo, J.W., Lee, T,H., Lee, Y.S., Sung, W.M. and Lee, J.H., 2009, “Development of 3D DFN Model with Rectangular Fracture Type,” J. of Mineral and Energy Resources, Vol. 46, No. 3, pp. 279-288.
Shin, H.J., 2001, Hydrogeological characterization of fractured crystalline rock and it's application to discrete fracture network model, Ph.D. Thesis, Yonsei University, Seoul.
Sung, W.M., 1994, Developments of Theory and Reservoir Simulator for Optimum Production Strategies in Naturally Fractured Reservoirs, Korea Science and Engineering Foundation.
Warren, J.E. and Root, P.P., 1963, “The Behavior of Naturally Fractured Reservoirs,” SPE 426, Transaction AIME, pp. 245-255.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 50
No :1
Pages :113-123
DOI :https://doi.org/10.12972/ksmer.2013.50.1.113

[1] Bear, J., Tsang, C.F. and Marsily, G., 1993, Flow and Contaminant Transport in Fractured Rock (eds.), Academic Press Inc., 560p.

[2] Einstein, H.H. and Baecher, G.B., 1983, “Probabilistic and statistical methods in engineering geology, Specific methods and examples, Part I: Exploration,” Rock Mechanics and Rock Engineering, Vol. 16, pp. 39-72.

[3] Fisher, R.A., 1953, “Dispersion on Sphere,” Proceeding of the Royal Society of London, A217, pp. 295-305.

[4] Follin, S., Stigsson, M. and Svensson, U., 2006, “Hydrogeologocal DFN modelling using structural and hydraulic data from KLX04,” SKB Report R-06-24.

[5] Go, T.Y., 2001, A Study on Groundwater Flow in Three-Dimensional Networks of Discrete Joints, MS Thesis, Hanyang University, Seoul.

[6] Golder Associates, 1999, User Documentation: FracWorks/95, Discrete Feature for Network Simulator (version 1.3), 130p.

[7] Han, J.S., 1997, Groundwater environment and pollution, Pybook, 1071p.

[8] Kazemi, H., Merrill, K.S., Porterfield, K.L. and Zeman, P.R., 1976, “Numerical Simulation of Water-Oil Flow in Naturally Fractured Reservoirs,” SPE 5719, Transaction AIME, pp. 317-326.

[9] Kim, H.S., Hahn, C., Kim, K.B., Lee, C.J. and Lee, K.K., 1998, A Study on the Characteristics of Groundwater Behavior in Limestone Regions, Water Resources Research Institute, Korea Water Resources Corporation, p. 134

[10] Kim, S.M., 2000, A study on lineament analysis and fracture network simulation in the area of Hoinammyun, Boeungun, MS Thesis, Yonsei University, Seoul.

[11] Kim, T.K. and Lee, H.K., 1994, “Numerical Analysis for Coupling of Groundwater Flow with the Behaviour of Jointed Rocks around a Cavern.” J. of Mineral and Energy Resources, Vol. 31, No. 6, pp. 537-548.

[12] Lee, J.H., 2009, The Difference for Numerical Analysis on Jointed Rock Tunnel, MS Thesis, Jeonnam University, Gwangju.

[13] Lee, W.S., Lee, J.H., KIM, S.J., KIM, H.T. and Huh, D.G., 2005, “Numerical Sensitivity Study on Parameter Affecting Solute Transport through Fractured Media,” J. of Mineral and Energy Resources, Vol. 42, No. 5, pp. 506-512.

[14] Lee, Y.J. and Jung, H.G., 2004, A Report of investigation (limestone, Jeongseon-Imgye area), Korea Resources Corporation.

[15] Long, J.C.S., Karasiki, K., Davey, A., Peterson, J., Landfeld, M., Kemeny, J. and Martel, S., 1991, “Inverse Approach to the Construction of Fracture Hydrology Models Conditioned by Geophysical Data. An Example from the Validation Exercises at Stripa Mine,” International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 28, No. 2-3, pp. 121-142.

[16] Mauldon, M., 1998, “Estimating Mean Fracture Trace Length and Density from Observations in Convex Windows,” Rock Mech. Rock Engrg, Vol. 31, No. 4, pp. 201-216.

[17] Noh, J.H. and Lee, N.K., 2007, “Applied-mineralogical Study on the Grinding Effects and Powder Properties of High-Ca Limestone,” J. of Mineral and Energy Resources, Vol. 44, No. 3, pp. 191-207.

[18] Pahl, P.J., 1981, “Estimating the mean length of discontinuity traces,” International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, Vol. 18, pp. 221-228.

[19] Park, J.S., 2007, Numerical Analysis on Coupled Behavior of Groundwater Flow around Excavation Damaged Zone in Discontinuous Rock Mass, MS Thesis, Seoul University, Seoul.

[20] Priest, S.D., 1993, Discontinuuity Analysis of Rock Engineering, Chapman & Hall, 473p.

[21] Seo, J.W., Lee, T,H., Lee, Y.S., Sung, W.M. and Lee, J.H., 2009, “Development of 3D DFN Model with Rectangular Fracture Type,” J. of Mineral and Energy Resources, Vol. 46, No. 3, pp. 279-288.

[22] Shin, H.J., 2001, Hydrogeological characterization of fractured crystalline rock and it's application to discrete fracture network model, Ph.D. Thesis, Yonsei University, Seoul.

[23] Sung, W.M., 1994, Developments of Theory and Reservoir Simulator for Optimum Production Strategies in Naturally Fractured Reservoirs, Korea Science and Engineering Foundation.

[24] Warren, J.E. and Root, P.P., 1963, “The Behavior of Naturally Fractured Reservoirs,” SPE 426, Transaction AIME, pp. 245-255.

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