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2016 Vol.15, Issue 3 Preview Page
Establishment on the Monitoring System for Unsaturated Characteristics Variation in a Mine Waste-Dump Slope

광산폐기물 적치사면의 불포화 특성변화 모니터링 시스템 구축

Young-Suk Song1*
,
In-Keun Jung2
송 영석1*
,
정 인근2
1Member, Principal Researcher, Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources
2Non Member, President, KCT E&C
*교신저자. *Corresponding Author. 
30 September 2016. pp. 49-55
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Abstract

Field measurement units and a system were constructed and installed in a waste-dump slope at the Imgi mine to investigate and analyze the variations in the unsaturated characteristics of the soil. The field instrumentation system was composed of a data acquisition system (DAS), a solar system, and measuring sensors. The rainfall, matric suction, and volumetric water contents were continuously measured from the units in the instrumented site. The variations in matric suction and volumetric water content were primarily affected by the rainfall intensity. At the surface of the slope, the largest increase and decrease in the changes in matric suction and volumetric water content were observed during the wetting and drying processes, respectively. Also, the matric suction and volumetric water content were 5‑35 kPa and 0.12‑0.24, respectively. However, the ground water level was not suddenly increased just after rainfall but gradually increased after 2 or 3 days later.

Keywords
Waste-dump slope
Field monitoring
Rainfall
Volumetric water content
Matric suction

본 연구에서는 부산 임기광산 광산폐기물 사면을 대상으로 강우 침투에 따른 지반내 불포화 특성변화를 살펴보기 위하여 불포화토 특성변화 측정유닛 및 시스템을 현장에 설치하였다. 불포화토 특성변화 측정시스템은 각종 측정유닛으로부터 측정된 자료를 저장, 관리 및 전달하는 시스템으로 Data Acquisition System(DAS), Solar System 및 불포화토 특성변화 측정유닛으로 구성되어 있다. 현장에 설치된 각종 측정유닛으로부터 측정된 강우, 체적함수비, 모관흡수력 등의 자료를 정리하여 분석하였다. 이들 결과를 살펴보면 강우시 체적함수비와 모관흡수력의 변화는 강우강도에 의해 크게 영향을 받으며, 강우시와 건기시 지표면 부근에서 가장 크게 증가하였다가 감소하는 것으로 나타났다. 그리고 현장에서 측정된 모관흡수력은 5-35kPa, 체적함수비는 0.12-0.24 범위에 존재하는 것으로 나타났다. 그러나 지하수위는 강우발생 직후 바로 증가하는 것이 아니라 2-3일의 시간이 경과한 뒤 증가함을 알 수 있다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 15
  • No :3
  • Pages :49-55
  • Received Date : 2016-06-24
  • Revised Date : 2016-07-28
  • Accepted Date : 2016-09-05
  • DOI :https://doi.org/10.12814/jkgss.2016.15.3.049
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