• Journal of the Mineralogical Society of Korea
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• v.30 no.1
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• pp.1-9
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• 2017

This study investigated the effectiveness of Unmanned Aerial Vehicle (UAV) and 3D modeling on mine reclamation monitoring. The high spatial resolution of 3.8 cm ortho-mosaic image and Digital Elevation Model (DEM) are constructed based on UAV air survey. The ortho-mosaic image effectively shows mine reclamation activities and recognize objects and topological changes in the image. The comparative analysis of 3D models between UAV based DEM and report based DEM reveals that total amount of $268,672m^3$ additional dumping of contaminated soil is equivalent to 710,000 ton. It concludes that a UAV based survey enables high accuracy spatial information extraction for mine reclamation activities with high efficiency. It is expected that UAV survey will be very effectively used for preliminary data acquisition and project monitoring for mine reclamation activities.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.391-395
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• 2008

본 연구는 전국에 산재되어 있는 광산으로 인한 피해 방지를 목적으로 광산 및 광해현황 정보를 체계적으로 관리하고 있는 광산GIS의 현황과 문제점을 분석하고, 광산지역의 개발계획 수립 및 국가SOC 사업 추진시 의사결정 기초자료로서의 광산GIS의 역할을 설명하고, 향후 시스템 확대 발전방향을 제시하고자 한다.

• Proceedings of the KSEEG Conference
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• 1999.04a
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• pp.315-317
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• 1999

• Economic and Environmental Geology
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• v.42 no.6
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• pp.619-626
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• 2009

The price fluctuation of minerals are commonly occurred through the change of market condition, and the redevelopment of closed mines are usually happened if commercial requirement can be satisfied. After 2003, as the price of most of metals increased very rapidly, Korea government tried to find the possibility of reopening for some closed metal mines. The purpose of this article is to suggest the proper ways how effectively to regulate the mine pollution concerning the redevelopment of closed mines. For this work, with the recent price trends of metals and reopening possibility of closed metal mines in Korea were reviewed. And analysing the problems of regulations for the mine development permission and mine pollution control and reclamation process of Korea, several amendments of environmental and mining regulation regimes for redevelopment of closed mines were proposed.

• Economic and Environmental Geology
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• v.54 no.4
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• pp.457-464
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• 2021

The objectives of this study were to analyze of soil chemical characteristics of abandoned coal mine forest rehabilitation areas in Gangwon-do. The study sites were 8 areas and the investigations were performed 11 times according to elapsed time. Soil characteristics were soil pH, TOC, Total-N, C/N ratio, and Av. P₂O₅. Soil pH and Av. P₂O₅ were decreased according to elapsed time after forest rehabilitation, while TOC, Total-N, and C/N ratio increased. TOC and Total-N arrived at quality requirements of covering soil for forest rehabilitation in abandoned coal mine area passed 10 years after forest rehabilitation, while soil pH became lower than that. Therefore, it needs long-term monitoring of soil chemical characteristics after the forest rehabilitation and to establish post management.

• Economic and Environmental Geology
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• v.53 no.3
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• pp.287-296
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• 2020

Mine Reclamation Project is being carried out with the aim of ensuring a sustainable green living and helping to develop eco-friendly mines by analyzing, removing and preventing the harmful factors. Mines developed during the japanese colonial period and mining boom period are still not repaired throughout the country, and from these scattered risks, public safety is worth pursuing as a top priority. The project that is close to public safety in the mine recalmation project is an emergency treatment, and the most widely used method is a filling method similar to the ground subsidence prevention. If dangerous mine cavity or tunnels are located in the mountains, charging with existing materials may not be possible, or unreasonable cases may occur, and new methods of technological development are required. Emergency actions should be carried out safely and efficiently to prevent the loss of precious people's lives on the hiking paths adjacent to dangerous mining sites. In these field conditions, urethane foam materials may be an alternative. In this study, the applicability of urethane foam materials in mining was reviewed through overseas cases. It was also tested on the appropriate depth of top soil for the protection of urethane foam materials through forest fire simulation test. The test result show that approximately 15cm of soil covering (recommended 20cm over) was suitable for maintaining the function of foam materials from forest fires.

• Journal of Soil and Groundwater Environment
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• v.11 no.3
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• pp.1-11
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• 2006

Attempts were made to analyze the national policy of soil contamination prevention and management of inactive or abandoned metal (IAM) mines in Korea. This approach focused on legal systems and legislation, remediation technology development, and the arrangement or distribution of budgets pertaining to national policy since the mid 1990's. Prevention of Mining Damage and Recovery Act enacted. Defines the roles, responsibility and budget of the government when recovering mine damages. However, in 2005 there still remains to improve the national policy of soil contamination prevention and management of IAM mines. Analysis of national and industrialized foreign countries including the United States, the United Kingdom, and the Netherlands suggest the following improvements: i) arranging distinct regulations between strict and non-strict liability criteria for potentially responsible parties; limiting innocent and non-strict liability depending on the period of incurred mining activity, ii) enhancing participation of local communities by enforcing law and legislation, iii) establishing a national database system of (potentially) IAM contaminated sites based on the Website-Geographic Information System, iv) carrying out site-specific risk assessments and remediation of IAM contaminated sites, v) preparation and distribution of clean-up fund at mine sites adequately, and vi) technology development for the cleaning of IAM contaminated sites; awarding positive incentives of a legal nature for participants applying newly developed technology in IAM mines.

• Resources Recycling
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• v.26 no.2
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• pp.80-88
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• 2017

Globally, there has been a lot of research related to recycling coal ash from power plant stations. This research is happening because there is a considerable shortage of sites for reclamation of increased coal ash every year. In addition, a variety of environmental pollutants have appeared because of mining activity. Abandoned coal mine, pits, and mine tailing piles caused pollutants to come to the surface resulting in serious damage for humans and the environment. Therefore in this study, we investigated whether or not coal ashes have the ability to prevent several environmental problems by mining in Korea and a manageable form recycling coal ashes. In overseas countries, there is a sufficient field of applicable cases where coal ash is used for neutralizing AMD (Acid Mine Drainage), covering of the waste materials, grouting, and soil amendments. However in Korea, since the coal ash is classified as a 'waste', there is an insufficient field applicable cases so far. Therefore it is necessary to establish a specific standard and management system for the utilization of coal ash based on the relevant precedent cases applied abroad in order to prevent environmental pollution caused by mining activity in Korea.

• Economic and Environmental Geology
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• v.54 no.6
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• pp.689-698
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• 2021

Since the mine reclamation scheme was implemented from 2007 in Korea, various remediation programs have been decontaminated the pollution associated with mining and 254 mines were managed to reclamation from 2011 to 2015. However, as the total amount of contaminated mine drainage has been increased due to the discovery of potential hazards and contaminated zone, more efficient and economical treatment technology is required. Therefore, in this study, the adsorption properties of arsenic was evaluated according to the adsorbents which were derived from water treatment sludge(Alum based adsorbent, ABA-500) and granular ferric hydroxide(GFH), already commercialized. The alum sludge and GFH adsorbents consisted of aluminum, silica materials and amorphous iron hydroxide, respectively. The point of zero charge of ABA-500 and GFH were 5.27 and 6.72, respectively. The result of the analysis of BET revealed that the specific surface area of GFH(257 m²·g^-1) was larger than ABA-500(126~136 m²·g^-1) and all the adsorbents were mesoporous materials inferred from N₂ adsorption-desorption isotherm. The adsorption capacity of adsorbents was compared with the batch experiments that were performed at different reaction times, pH, temperature and initial concentrations of arsenic. As a result of kinetic study, it was confirmed that arsenic was adsorbed rapidly in the order of GFH, ABA-500(granule) and ABA-500(3mm). The adsorption kinetics were fitted to the pseudo-second-order kinetic model for all three adsorbents. The amount of adsorbed arsenic was increased with low pH and high temperature regardless of adsorbents. When the adsorbents reacted at different initial concentrations of arsenic in an hour, ABA-500(granule) and GFH could remove the arsenic below the standard of drinking water if the concentration was below 0.2 mg·g^-1 and 1 mg·g^-1, respectively. The results suggested that the ABA-500(granule), a low-cost adsorbent, had the potential to field application at low contaminated mine drainage.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1997.05a
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• pp.17-20
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• 1997

이 연구에서는 국내에 산재되어 있는 금속광산들에 대한 토양환경오염을 조사하고 적절한 환경처리를 위한 기초자료를 제공하기 위하여 대표적인 연-아연광산, 동광산 및 금-은광산을 대상으로 As. Cd, Cu, Pb, Zn 등의 오염규모와 분산정도를 규명하고자 하였다. 연구대상지역으로 삼보 연-아연강산, 달성 동-텅스텐광산 그리고 구봉, 삼광, 금왕 금-은광산을 선정하여 이들 광산 주변에서 토양을 채취하여 화학분석을 실시하였다. 그리고 연속추출법을 이용하여 토양중에 존재하는 중금속의 존재형태를 규명하였으며 화학분해방법에 따른 중금속의 추출정도를 고찰하기 위하여 강산을 이용한 분해방법과 토양환경보전법에 제시된 방법을 비교하였다. 화학분석 결과, 삼보광산 주변의 상부토양 (0-15cm 심도)에서는 평균 11.8 $\mu\textrm{g}$/g Cd, 208 $\mu\textrm{g}$/g Cu, 2,700 $\mu\textrm{g}$/g Pb, 8,300 $\mu\textrm{g}$/g Zn이 검출되었으며 일부 농경지에서는 토양환경보전법의 우려기준을 초과하는 중금속이 검출되어 광산활동에 의한 토양오염이 심각함이 조사되었다. 달성광산 주변 토양에서도 다량의 중금속이 검출되었으며 (평균 4.4 $\mu\textrm{g}$/g Cd, 1,950 $\mu\textrm{g}$/g Cu, 1,030 $\mu\textrm{g}$/g Pb, 419 $\mu\textrm{g}$/g Zn) 특히 As (평균 2,500 $\mu\textrm{g}$/g)의 오염이 심각하였다. 그리고 대표적인 금은광산인 구봉, 삼광 및 금왕광산에서는 광미와 선광장 주변에서 다량의 중금속과 As가 검출되었다. 이 연구 결과, 이들 점오염원에 대한 오염정도가 심각하므로 이를 적절하게 처리할 수 있는 오염복구사업이 실시되어야할 것으로 판단된다.