석회석 광산 갱내수 유입원 예측분석 사례연구
A Case Study on Predicting and Analyzing Inflow Sources of Underground Water in a Limestone Mine
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초록
광산개발에 따른 지하수 유동의 변화는 지반의 소성 변화 및 강도 저하, 붕락과 같은 주요 문제의 발생 원인으로 작용한다. 지속적인 채광 작업이 유지되기 위해서는 계절적인 갱내수 유입량의 변화와 단전이나펌프의 파손 및 돌발적인 유입량의 증대에 대처할 수 있도록 갱내수 유입에 대한 대책을 마련해야 한다. 본 연구는 연구 대상지와 인근에 있는 석회석 광산과의 수리적 연결성 확인을 통한 갱내 누수의 원인 규명을 목적으로 지하 매질의 연결성 확인을 위한 추적자 시험을 수행하였다. 염료계, 이온계 등 다양한 추적자를 적용한 실내실험을 통해 추적자 물질을 선정하였고, 현장 시험을 통해 대상지역의 수리지질 모델을 구현하였다. 이를 통해 광산 외부 계곡과 갱내수에 대한 수리적 연결성과 갱내 누수의 원인을 규명하였다.
Abstract
The changes in groundwater flow due to mining development act as a contributing factor to major issues such as ground subsidence, strength reduction and collapse. For the sustainable mining development, measures for dealing with fluctuations in seasonal underground water inflow, power losses, pump damage, and unexpected increases in inflow must be put in place. In this study, the aim is to identify the causes of underground seepage through the examination of hydrological connectivity between the study area and nearby limestone mine. A tracer tes for assessing subsurface connectivity has been planned. A variety of tracers, such as dyes and ions, were applied in lab test to select the optimal tracer material, and a hydrological model of the study area was implemented through field test. Finally, the hydrological connectivity between the external stream and underground water in the mine was analyzed.
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