• Journal of the Korean Society of Environmental Restoration Technology
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• v.3 no.2
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• pp.24-34
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• 2000

The project for rehabilitation and revegetation of the abandoned coal-mine lands is a very important national environmental restoration project in the view point of rehabilitation and revegetation of denuded forest-lands caused by coal mining as well as restoration of disturbed natural environment and control of the variable pollutions. In Korea, because a large number of coal mines had been developed in order to fill up abundantly consumption of coal as a major energy source in the developing period, a lot of denuded forest-lands caused by coal mining had distributed in the whole country. And, due to the absence of effective rehabilitation and revegetation works on the denuded forestlands caused by coal-mining, most of them had been remained with being damaged. In 1990, area of the abandoned coal-mine lands, requiring the rehabilitation and revegetation works, was about 1,437.1 ha. For the past ten years ('90~'99), about 1,081.8 ha out of them had been rehabilitated and revegetated, and the rehabilitation planning area was about 33.0 ha in 2000. So, remaining area out of abandoned coal-mine lands will be about 322.3 ha after 2000. In principle, after abandoning coal-mine, mine owners must carry out the rehabilitation and revegetation works on the abandoned mine lands by themselves. But, most of mine owners were in financial difficulty after abandoning coal-mine, so that principle couldn't have obtained the desired effects. To solve this problem, from 1995, Coal Industry Promotion Board (CIPB) have carried out the rehabilitation and revegetation works on the abandoned coal-mine lands at government budgets, and they have obtained good results in the construction area. However, due to application of the "conventional erosion control measures and techniques" to the rehabilitation and revegetation measures on the abandoned coal-mine lands, the results and effects of the works excuted have not been successful. Therefore, unique measures and techniques for rehabilitation and revegetation of the abandoned coal-mine lands will have to be developed, especially including development of new techniques on the soil-dressing and soil-covering, seed spray and hydro-seeding measures with seed-fertilizer-soil materials as the mechanized measures, and using of new materials for the tree planting and seedling measures.

• Economic and Environmental Geology
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• v.55 no.2
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• pp.149-169
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• 2022

Indonesia coal is widely consumed as a major energy source in Asian countries, such as China, India, and Korea. In the paper, the characteristics of the coal-bearing basin and coal deposits in Indonesia are comprehensively reviewed using the exploration data accumulated through the coal exploration projects supported by Korean government subsidy. Cenozoic coal bearing sedimentary basins in Indonesia extensively contain coal deposits and are most productive in East Asia. Properties of coal deposits are variable depending on stratigraphy, depositional histories and tectonics. Eocene coal deposits tend to have thinner coal thickness and fewer numbers of coal seams, but have been major exploration targets due to higher calorific value and good coal quality. Late Oligocene-Early Miocene coal deposits occur in small scales, but are suitable enough for small to medium-sized coal mines. Miocene-Pliocene coal deposits, which are widely distributed across East Kalimantan and Sumatra, are being actively mined by taking advantage of thick coal thickness and abundant reserves in spite of their lower calorific values. The experience of various exploration informs that we need to have an overall understanding on geological conditions for successful coal exploration. The details on coal-bearing basin and coal deposits in Indonesia provided through the paper will be useful data for up-coming exploration activities by Korean companies.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.3 no.2
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• pp.75-97
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• 2000

우리 학회에서는 최근에 폐탄광지 복구에 관한 관심이 고조되고 있으며, 특히 금년내 적당한 시기에, 되도록 빠른 시일 안에 폐탄광지 복구에 관한 국제 심포지엄을 개최할 계획을 가지고 있으나, 아직 학회 설립이후 이 분야에 관한 연구활동이 다소 일천하므로 기초자료준비가 미진한 상태에 있는 현실이다. 이러한 현실적인 상황하에서 필자는 학회의 회장으로서 학회와 회원들의 연구활동지원을 위한 기초적인 자료라도 수집 제공해야 되겠다는 취지를 가지고 이런 저런 일을 진행하고 있다. 이와 같은 학회활동의 하나로 우선 지난 5월 15일부터 20일까지 중국 북경시 신대도(新大都)호텔에서 중국토지학회(中國土地學會) 중국토지부간학회(中國土地復墾學會) 주최로 개최된 "북경 국제토지부간학술연토회(北京 國際土地復墾學術硏討會)" 심포지엄(Beijing International Symposium on Land Reclamation ISLR 2000 - Mine Land Reclamation and Ecological Restoration for 21st Century)에 참석하여 국제적인 상황을 파악할 수 있도록 한 바 있다. 또한 한국의 "폐탄광지역의 산림훼손지 복구 및 폐석유실 방지대책에 관한 고찰" 원고를 우리 학회지에 투고 게재하여 우리 나라의 폐탄광지 복구에 대한 현황을 개략적으로 이해할 수 있도록 하고저 한다. 이와 같은 일을 하다보니, 우리 학회에서도 석탄광산에 관한 전문용어를 파악해야 되겠다는 필요성에 따라서 우선 필자가 가지고 있는 제반 용어자료(참고문헌 제시)를 종합적으로 정리하여 이 용어집을 발표하고자 한다. 이 "소고(小考)" 용어집은 시기적으로 우리 학회 회원들의 필요성에 의해서 편집된 "초고(草稿)" 수준이며, 약 860 용어가 영문 국문(ABC순)/국문 영문(ㄱㄴㄷ순)으로 편집되었다. 이 용어집은 장차 우리 학회에서 용어제정의 기회가 있을 때에는 귀중한 표준 자료로 활용될 수 있을 것이다. 따라서 이 용어집은 우리 학회 제정 표준용어집이 아니라 단순히 필자의 연구자료(안)로 보아야 할 것이다.

• Journal of Environmental Impact Assessment
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• v.32 no.3
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• pp.157-165
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• 2023

In Korea, a major contaminant of farmland soils in the vicinity of abandoned mines is arsenic, for which the general soil reclamation method is contaminated soil stabilization and cover the stabilized soil with clean soil at a thickness of 40 cm. In a previous pot experiment study we confirmed the feasibility of a lower thickness (20 cm) of covering soil for such reclamation in abandoned coal mines, where arsenic contamination levels are generally lower than in metal mines. In this subsequent study a field experiment including rice plant cultivation in field test plots was conducted. For over 4 months, the transfer of arsenic from the contaminated soil to the unpolished rice grains was reduced by 44% when a clean soil covering with a thickness of 20 cm was applied. The maximum decrease (56%) was shown when the stabilization process was performed before the covering. These results reveal a lower thickness of clean soil covering has a high feasibility and it can increase cost-efficiency in the reclamation of an abandoned coal mine.

• Journal of Korean Society of Forest Science
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• v.95 no.1
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• pp.23-31
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• 2006

Vegetation structure of Samchang, Bongmyeong, Kabjeong, Danbong coal mine and control site was investigated to provide basic information on vegetation rehabilitation of abandoned coal mine lands in Mungyeong. Gyeongbuk Province. The middle and lower layer consisted of 3 and 10 species for Samchang, 2 and 5 species for Bongmyeong, 7 and 11 species for Kabjeong, 9 and 12 species for Danbong coal mine, and 15 and 17 species appeared for control site, respectively. Importance value of Lespedeza cyrtobotrya in lower layer was the highest for in Samchang, and that of Rubus crataegifolius in other coal mine lands wast he highest. Importance value in herbaceous layer was the highest for Arundinella hirta in Samchang, for Corchoropsis tomentosa in Bongmyeong, for Miscanthus sinensis in Kabjeong, for Carex lanceolata and Artemisia princeps var. orientalis in Danbong coal mines, and Calamagrostis arundinacea in control site was the highest, respectively. Species diversity of middle and lower layer for four coal mine lands ranged from 0.201 to 0.666 and 0.612 to 0.895, respectively. Evenness of lower layer ranged from 0.683 to 0.875 for four coal mine lands, and it was 0.990 for control site.

• Economic and Environmental Geology
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• v.55 no.2
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• pp.209-217
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• 2022

The purpose of this study was to confirm the dissolution of arsenic from the stabilized soil around abandoned coal mines by cultivation activities. Experimental soils were collected from the agricultural field around Okdong and Buguk coal mines, and the concentration of arsenic in the soil and the geochemical mobility were confirmed. The average arsenic concentration was 20 mg/kg. The soil with relatively high geochemical mobility of arsenic in the soil was used in the batch and column experiment. The limestone was mixed with soil for soil stabilization, and the mixing ratio was 3% of limestone, based on the soil weight. The phosphoric acid fertilizer (NH₄H₂PO₄) was added to the soil to simulate a cultivation condition according to the Rural Development Administration's rules. Comparative soil without mixing limestone was prepared and used as a control group. The arsenic extraction from soil was increased following the fertilizer mixing amount and it shows a positive relationship. The concentration of phosphate in the supernatant was relatively low under the condition of mixing limestone, which is determined to be result of binding precipitation of phosphate ions and calcium ions dissolved in limestone. Columns were set to mix phosphoric acid fertilizers and limestone corresponding to cultivation and stabilization conditions, and then the column test was conducted. The variations of arsenic extraction from the soil indicated that the stabilization was effectible until 10 P.V.; however, the stabilization effect of limestone decreased with time. Moreover, the geochemical mobility of arsenic has transformed by increasing the mobile fractions in soil compared to initial soil. Therefore, based on the arsenic extraction results, the cultivation activities using phosphoric fertilizer could induce a decrease in the stabilization effect.