거풍광산 광산폐기물의 지구화학적 및 수리적 특성에 미친 강우 효과
Impact of the Rain on the Geochemical and Hydrological Characteristics Within a Mine Waste Impoundment at the Geopung Mine, Korea
1
조회
0
다운로드
7
인용
0
참고문헌
키워드
초록
This study was carried out to evaluate the impact of the rain infiltration on the changes in the volumetric water contents (VWC), the electric conductivities (EC) by burying sensors underneath waste rocks to measure the water quality of the groundwater in the wells at waste rock and tailings impoundments at the Geopung mine. Monitoring results revealed that both the VWC and EC increased at the same time depending on the rainfall. These mean that the soluble salts were already developed on the surface and in pores of mine wastes due to the past oxidation of sulfide minerals. According to measurements of VWC, the direction of the infiltration in flat surface was near vertical and the one on the slope surface parallel to the slope. These imply that the movement of infiltration was controlled by the geometrical characteristics such as slope or flat surface of the impoundment. In the rainy season, the groundwater level in the well at waste rocks was raised and then dropped rapidly while the readings in the tailings slowly responded to the rain due to the its low permeability. Chemical analyses of groundwater in wells showed that the water was very acidic with the high level of EC and some metals. It may be concluded that the soluble salts including the hydrogen ion and some ions had been flushed into the groundwater by the rain infiltration and thereby waste rocks and tailings had acted as sources of the acid rock drainage. It might be suggested that some countermeasures such as putting a covering on the mine wastes could be used to prevent the occurrence and spreading of acid rock drainage around the mine area.
Abstract
This study was carried out to evaluate the impact of the rain infiltration on the changes in the volumetric water contents (VWC), the electric conductivities (EC) by burying sensors underneath waste rocks to measure the water quality of the groundwater in the wells at waste rock and tailings impoundments at the Geopung mine. Monitoring results revealed that both the VWC and EC increased at the same time depending on the rainfall. These mean that the soluble salts were already developed on the surface and in pores of mine wastes due to the past oxidation of sulfide minerals. According to measurements of VWC, the direction of the infiltration in flat surface was near vertical and the one on the slope surface parallel to the slope. These imply that the movement of infiltration was controlled by the geometrical characteristics such as slope or flat surface of the impoundment. In the rainy season, the groundwater level in the well at waste rocks was raised and then dropped rapidly while the readings in the tailings slowly responded to the rain due to the its low permeability. Chemical analyses of groundwater in wells showed that the water was very acidic with the high level of EC and some metals. It may be concluded that the soluble salts including the hydrogen ion and some ions had been flushed into the groundwater by the rain infiltration and thereby waste rocks and tailings had acted as sources of the acid rock drainage. It might be suggested that some countermeasures such as putting a covering on the mine wastes could be used to prevent the occurrence and spreading of acid rock drainage around the mine area.
참고문헌 (21)
- 이평구, "서보광산 폐광석 내 2차 광물에 의한 중금속 고정화", 자원환경지질, 36(3), pp.177~189 (2003), 대한자원환경지질학회
- 고주인, "탄광폐석장 특성화를 통한 복토설계 및 침출 수 처리 방안에 관한 연구", 박사, pp.2007
- 광상시추조사보고 제 1호, "광업진흥공사", 179~ (1972)
- 김계훈, , pp.52~145 (2006), 토양학 향문사
- 문용희, "구룡광산 광미층의 심도변화에 따른 물리·화학적 및 광물학적 특성", 자원환경지질, 41(2), pp.183~199 (2008), 대한자원환경지질학회
- 박천영, "광양 폐금광 수계에 형성된 철수산화물에 대한 광물학적 및 지구화학적 특성", 지구 과학회지, 22(3), pp.208~222 (2001)
- 안주성, "풍화광미내 고상 비소의 광물학적·화학적 특성 및 용출 가능성 평가", 자원환경지질, 36(1), pp.27~38 (2003), 대한자원환경지질학회
- 대도시 지질환경오염개선 관리기술연구 ( 부산지역),한국지질자원연구원 연구보고서, "정영욱", 233~241, pp.KR-04(10 차) (2004)
- Alpers, C.N. Blowes, "D.W., Nordstrom, D.K, and Jambor, J.L., 1994, Secondary minerals and acid mine water chemistry in The Environmental Geochemistry of Sulfide Mine-Wastes : edn D.W. Blowes & J.L. Taubor", pp.247~270 (1994), Ontario
- Blowes, D.W., "Acid-neutralization Mechanism in Inactive Mine Tailings in The Environmental Geochemistry of Sulfide Mine-Wastes : edn D.W. Blowes & J.L. Taubor", edn D.W. Blowes& J.L. Taubor, 22, pp.271~292 (1994)
- Brady, N.C., "The nature and properties of soils, Prentice -Hall, Inc., pp. 215-240", ~ (1996)
- Fala, O., "Numerical modelling of flow and capillary barrier effects in unsaturated waste rock piles", Mine water and the environment, 24, pp.172~185 (2005)
- Harries, J.R., "The use of temperature profiles to estimate the pyritic oxidation rate in a waste rock dump from an opencut mine, Water, Air and Soil Pollution", 15, pp.405~423 (1981)
- Lefebvre, R., "Multiphase transferprocesses in waste rock piles producing acid mine draiange 1: Conceptual model and system characterization", Journal of contaminant hydrology, 52, pp.137~164 (2001)
- Lidvall, M., "Developing a comprehensive waste-rock management plan for the Aitik mine in Northern Sweden,” In proceedings of Internatinal Conference on Mining and the Environment Metals and Energy Recovery, Skelleftea, Sweden, pp. 576-585", ~ (2005)
- Massmann, J. W., "Effects of atmospheric pressures on gas transport in the vadose zone", Water Resources Research, 28(3), pp.777~791 (1992)
- Ritchie, A.I.M., "Sulfide oxidation mechanism: Controls and rates of oxygen transport", in The Environmental Geochemistry of Sulfide Mine-Wastes : edn D.W. Blowes & J.L. Taubor, 22, pp.202~245 (1994)
- Smolensky, J., "“Oxygen transport processes in the Nordhale of the Ronnenburg mining district, Germany,” In Proceedings mining and the environment II 1999, Sudbury, Ontario, Canada, pp. 271-280", ~ (1999)
- Wels, C., "An overview of prediction and control of air flow in acid-generating waste rock dumps, 6th ICARD, pp. 639-650", ~ (2003)
- Wels, C., "Infiltration test pilot study for mine rock piles at Questa mine, New Mexico", pp.17~ (2001), Albuquerque
- Xu, T., "Modeling of pyrite oxidation in saturated and unsaturated subsurface flow systems", Transport in porous media, 39, pp.25~56 (2000)