Mine In Korea Research Articles

Simple method for the identification of subsidence susceptibility above underground coal mines in Korea

Estimation of subsidence susceptibility due to mining is a primary task for the effective and economical management of subsidence. If the status of an underground mine is well known, this process is simple and clear. Unfortunately, in Korea, the excavation shape is typically complicated because of the complex geological characteristics and corresponding mining methods, and relevant data on abandoned or closed coal mines are often deficient. Therefore, estimation methods developed elsewhere are usually not suited to Korean coal mines. To solve this problem, we developed a quick, simple and quantitative method suitable for the estimation of subsidence susceptibility prior to the detailed field investigation of coal mines. Gangway depth from the surface and the attitude (dip and dip direction) of main geological features were selected as input data based on the degree of availability and reliability, and the gangway was represented as a series of points instead of closed polygons for easy calculation. Two core assumptions of this method were that the susceptibility to subsidence within a unit area increases as i) the depth of the gangway from the surface decreases and ii) the number of gangways below the unit area increases. In spite of the simplicity of this method, it gave satisfactory results when applied to one virtual excavation model and two closed coal mines where subsidences had occurred.

트럭 고장 및 파쇄기 처리용량을 고려한 노천광산 쇼밸-트럭 운반 시뮬레이션

This paper presents a case study that performed simulations on shovel-truck haulage systems in an open-pit mine by considering truck's breakdown and crusher's capacity. The SSangyoung limestone open-pit mine in Korea was selected as a study area and investigated to design the simulation algorithms. The GPSS/H simulation language is used to implement the simulation algorithms as a console application(simulator). The values of input parameters for simulator were measured by field investigation in the study area. The simulation results showed that 7 trucks can maximize the daily profit of haulage operations(i.e., 73,775 USD) when considers the frequency of trucks' breakdown as 1/40 hour -1 . In addition, the crusher capacity of 1300 tph is required to improve the efficiency of

Assesment of Releasable Asbestos From Soil to Air by the Releasable Asbestos Sampler(RAS) Around Abandoned Asbestos Mine in Korea

Assesment of Releasable Asbestos From Soil to Air by the Releasable Asbestos Sampler(RAS) Around Abandoned Asbestos Mine in Korea

Blood cadmium concentration of residents living near abandoned metal mines in Korea.

The purpose of this study was to investigate demographic and lifestyle variables and blood cadmium concentrations in residents living near abandoned metal mines in Korea. Blood cadmium concentrations were measured in 15,161 subjects living around abandoned metal mines (exposed group, n = 14,464) and compared with those living in designated control areas (control group, n = 697). A questionnaire was provided to all subjects to determine age, gender, mine working history, times of residence, smoking habits and dietary water type. The geometric mean (95% confidence intervals) of blood cadmium concentration (1.25 [1.24-1.27] µg/L) in the exposed group was significantly higher than in the control group (1.17 [1.13-1.22] µg/L). Mean residence time and mine working history in the exposed group were significantly higher than in the control group. Blood cadmium concentrations increased with increasing age, and residence time in both groups, and blood cadmium concentrations were higher in current-smokers than in non-smokers in both groups. This study shows the geometric mean of blood cadmium concentration in abandoned mining areas are higher than in non-mining areas in the general adult Korean population.

폐금속광산 주변 논토양 및 벼작물의 비소함량과 계절적 변화

이 연구는 국내 휴폐금속광산 주변의 논토양과 식물(벼)의 비소 오염과 계절적 변화를 고찰하고, 토양과 식물의 유기적 관계규명을 위해 토양시료를 왕수, 1 M <TEX>$MgCl_2$</TEX>, 0.01 M <TEX>$CaCl_2$</TEX> 및 0.05 M EDTA 등 다양한 추출제로 전처리하여 비소를 분석하였다. 화학분해 방법에 따른 함량 변화는 통계적으로 유의한 양의 상관관계를 보이며(p<0.01), 1 M <TEX>$MgCl_2$</TEX> >0.01 M <TEX>$CaCl_2$</TEX> >0.05 M EDTA 순으로 나타났다. 벼줄기의 생물학적 농축계수는 산화환경보다 환원환경에서 높았으며, 백미시료에서는 농축계수가 0.02로 낮게 나타났다. 농가의 1일 평균 쌀소비량인 315 g을 적용하여 세계보건기구의 미량원소 1일 섭취 최대허용량과 비교한 결과 농가에서는 65%의 높은 섭취량을 보여, 이들 쌀 소비에 의한 비소의 인체섭취도에 중요한 역할을 하고 있음을 확인하였다. The objective of this study is to investigate the contents and seasonal variation of arsenic in soils and crop plant(rice) in paddy fields around the abandoned metal mines in Korea. The soils were extracted by various methods including aqua regia, 1 M <TEX>$MgCl_2$</TEX>, 0.01 M <TEX>$CaCl_2$</TEX> and 0.05 M EDTA to evaluate the relationships between soils and crop plants(rice). According to correlation analysis, statistically significant correlation with the four methods(p<0.01) were found in soils extracted by various chemical solutions and arsenic contents in soils were decreased in the order of 1M <TEX>$MgCl_2$</TEX> > 0.01M <TEX>$CaCl_2$</TEX> > 0.05 M EDTA. Biological accumulation coefficients(BACs) of rice stalks were higher than those of rice grain, and the coefficients under reducing(August) environment were higher than those under oxidizing conditions(October). Assuming the rice consumption of 315 g/day by farm households in Korea, the amount of daily intake of arsenic were estimated to be 77.8 <TEX>${\mu}g/day$</TEX>. The daily intake of arsenic from the rice estimates up to 65% of ADI(acceptable daily intake) that the FAO/WHO Joint Food Additive and Contaminants Committee has set to evaluate their safeties.

3차원 모델링을 이용한 재개광 양양철광의 운반시스템 설계

To achieve mine development, a large amount of data concerned with the geological structure and the ore body had to be investigated and collected through geological survey, drilling and geophysical explorations. In most previous cases, however, the data were usually analyzed two dimensionally and those results showed some limits because of their 2D presentation. Those 2D maps such as geological plane sections or longitudinal sections cause lots of difficulties in understanding the complex geological structure or the feature of ore body in a spatial way. In this study, research area was set on the abandoned Yangyang iron mine in Korea and the Sugaeng ore body within the mine was selected as the research target to design a mine haulage system for reopening. A 3D mine model of this area was tried to be constructed using a 3D modelling software, GEMS. An accurate 3D model including the ore body, the geological structure, the old underground mine drifts and the new mine drifts was constructed under the purpose of reopening of the abandoned iron mine. Especially, mine design for trackless haulage system was conducted. New inclines and drifts were planned and modelled 3 dimensionally considering the utilization of old drifts and shaft. In addition to the 3D modelling, geostatistical technique was adopted to generate a spatial distribution of the ore grade and the rock physical properties. 3D model would be able to contribute in solving problems such as evaluating ore reserves, planning the mine development and additional explorations and changing the development plans, etc.

수압식 충전의 효율 향상을 위한 선단장치 개발에 관한 연구

최근 국내에서는 폐광산 지반보강공사를 실시함에 있어 수압식 충전법을 적용하는 사례가 증가하고 있으나 효율적인 충전법 적용을 위해 현장 특성을 고려한 다양한 연구가 미흡한 실정이다. 본 연구에서는 수압식 충전공법의 충전효율 개선을 위한 선단장치 개발을 위하여 수조 모형실험 및 현장실험을 실시하였다. 수조 모형 실험을 통해 동일조건 하에서 선단장치 노즐각도 및 노즐형태 변화에 따른 충전효율을 평가하고, 이로부터 고안된 선단장치 모델을 현장실험에 적용한 결과, 노즐각 <TEX>$90^{\circ}$</TEX>관을 사용한 경우 일반적인 수직관을 사용한 경우에 비해 충전량이 약 18% 증가하는 것을 확인할 수 있었다. 이때 안식각은 <TEX>$30.82^{\circ}$</TEX>였다. 현장에서는 일반적으로 안식각을 <TEX>$40^{\circ}$</TEX>로 가정하고 충전공 간격을 5m에서 최대 10m 이내로 설계하였지만, 본 연구 결과에 따라 안식각을 <TEX>$30^{\circ}{\sim}35^{\circ}$</TEX>로 적용하면 충전공 간격을 최소 10m에서 최대 15m까지 넓히는 것이 가능하여 경제적이고 효율적인 채굴적 충전이 가능할 것으로 기대된다. In recent, the using of the hydraulic filling method has increased on the underground reinforcement of the abandoned mine in Korea, however it is the lack of research on the efficient filling method. In this study, tank model tests and field tests were conducted for development of tip device for filling efficiency improvements on the hydraulic filling method. In tank model experiments, the filling efficiency was evaluated according to the form and angle of the nozzle on tip device in the same condition. Then tip device model designed by tank model tests was applied to the field experiment. As a result, the amount of filling of nozzle <TEX>$90^{\circ}$</TEX> tube is increased by approximately 18% compared to the common vertical injection pipe. The angle of repose was <TEX>$30.82^{\circ}$</TEX>. Filling hole spacing in the field is usually designed from 5m up to 10m assumed to be <TEX>$40^{\circ}$</TEX> of the angle of repose. According to the results of this study, it is possible that the filling hole spacing expands at least 10m up to 15m applied to be <TEX>$30^{\circ}{\sim}35^{\circ}$</TEX> of the angle of repose. Therefore, it is expected to be economical and efficient mine filling.

GRAM 모델을 이용한 폐탄광 지역 지하수 리바운드 현상 분석

폐광된 광산에서는 채광장으로 유입되는 지하수의 펌핑 작업을 더 이상 수행하지 않기 때문에, 채광 공동이나 채광장 주변 지층에서 지하수위가 점진적으로 상승하는 지하수 리바운드 현상이 발생한다. 그동안 폐광산 지역의 지하수 리바운드 현상을 분석할 수 있는 다양한 수치모델들이 개발되었다. 본 논문에서는 폐탄광지역의 지하수 리바운드 현상 분석시 활용할 수 있는 VSS-NET, GRAM, MODFLOW 모델에 대해 조사하고, 공간적/시간적 규모에서 각 모델의 적용 범위에 대해 소개하였다. 특히, GRAM 모델에 대해서는 상세한 분석을 수행하였으며 포트란 언어를 이용하여 프로그램을 구현하였다. GRAM 모델을 이용하여 국내 동원탄광 수갱의 지하수 리바운드 현상을 분석하였으며, 현장의 지하수위 계측 결과와 GRAM 모델의 분석 결과가 유사한 것으로 나타났다. Cessation of dewatering usually results in groundwater rebound after closing an underground coal mine because the mine voids and surrounding strata flood up to the levels of decant points such as shafts and drifts. Several numerical models have been developed to predict the timing, magnitude and location of discharges resulting from groundwater rebound. This study reviews the numerical models such as VSS-NET, GRAM and MODFLOW, and compares their scopes of assessment at different spatial and time scales. In particular, the GRAM model was reviewed in details to implement it. This paper describes the implementation of GRAM model and its application to the Dongwon coal mine in Korea. The application showed that the groundwater level modeled at the shaft of Dongwon coal mine using the GRAM model is similar to the observed one in the field.

Heavy metal immobilization in soil near abandoned mines using eggshell waste and rapeseed residue

Heavy metal contamination of agricultural soils has received great concern due to potential risk to human health. Cadmium and Pb are largely released from abandoned or closed mines in Korea, resulting in soil contamination. The objective of this study was to evaluate the effects of eggshell waste in combination with the conventional nitrogen, phosphorous, and potassium fertilizer (also known as NPK fertilizer) or the rapeseed residue on immobilization of Cd and Pb in the rice paddy soil. Cadmium and Pb extractabilities were tested using two methods of (1) the toxicity characteristics leaching procedure (TCLP) and (2) the 0.1 M HCl extraction. With 5 % eggshell addition, the values of soil pH were increased from 6.33 and 6.51 to 8.15 and 8.04 in combination with NPK fertilizer and rapeseed residue, respectively, compared to no eggshell addition. The increase in soil pH may contribute to heavy metal immobilization by altering heavy metals into more stable in soils. Concentrations of TCLP-extracted Cd and Pb were reduced by up to 67.9 and 93.2 % by addition of 5 % eggshell compared to control. For 0.1 M HCl extraction method, the concentration of 0.1 M HCl-Cd in soils treated with NPK fertilizer and rapeseed residue was significantly reduced by up to 34.01 and 46.1 %, respectively, with 5 % eggshell addition compared to control. A decrease in acid phosphatase activity and an increase in alkaline phosphatase activity at high soil pH were also observed. Combined application of eggshell waste and rapeseed residue can be cost-effective and beneficial way to remediate the soil contaminated with heavy metals.

Estimation of soil erosion and sediment yield from mine tailing dumps using GIS: a case study at the Samgwang mine, Korea

This paper presents a Geographical Information Systems (GIS)-based method for the estimation of soil erosion and sediment yield from mine tailing dumps at abandoned mining areas. A region of 21.27 km2 in size around the Samgwang mine in Korea was selected as a study area. GIS data sets (i.e. a Digital Elevation Model (DEM), a soil map and a land cover map) and the mean annual rainfall over 30 years recorded from the nearest observatory were used to create factor layers for calculating the mean annual rate of soil erosion using the universal soil loss equation model. The watershed areas were extracted from the DEM using hydrological analysis tools in GIS. The concept of sediment delivery ratio was used to determine the sediment yield from mine tailing dumps during storm events. As a result, the soil erosion and sediment yield from mine tailing dumps in the study area were calculated as 75.63–350.24 tons yr− 1 and 40.40–187.64 tons yr− 1 respectively.

The Prevalence of Asbestos Related Pleural Plaque among Residents Living Near Asbestos Mines in Korea

The Prevalence of Asbestos Related Pleural Plaque among Residents Living Near Asbestos Mines in Korea

Arsenic contamination in agricultural soils surrounding mining sites in relation to geology and mineralization types

Abstract A national-scale survey of the environment in and around mines was conducted to evaluate the status of total As contamination in agricultural soils surrounding numerous abandoned metal mines in Korea. This survey aimed to compare As concentrations in soils in relation to geology and mineralization types of mines. A total of 16,386 surface soil (0–15 cm in depth) samples were taken from agricultural lands near 343 abandoned mines (within 2 km of each mine). These samples were decomposed by aqua regia and analyzed for As by AAS with a hydride-generation (HG) device. To compare As levels in soils meaningfully with geology and mineralization types, three sub-classification criteria were adapted: (1) five mineralization types, (2) four valuable ore mineral types, and (3) four parent rock types. The average concentration of As in all the soils was 11.6 mg kg −1 with a range of 0.01–4230 mg kg −1 . Based on the mineralization types, average As concentrations (mg kg −1 ) in the soils decreased in the order of pegmatite (18.2) > hydrothermal replacement (14.5) > sedimentary deposits (12.4) > hydrothermal vein (10.7) > skarn (4.08). In terms of the valuable ore mineral types, the concentrations decreased in the order of Sn, W, Mo, Fe and Mn mines > Au, Ag, and base metal mines > Au and Ag mines ≈ base metal mines. For parent rock types, soils from metamorphic rocks and heterogeneous rocks exhibited enhanced As levels related to both igneous and sedimentary rocks. Therefore, it can be concluded that soils from highly altered rocks subject to metamorphic and igneous activities contained relatively high concentrations of As in the surface environment.

폐금속 광산 주변 비소 및 중금속 오염농경지의 안정화 처리를 위한 석회석과 제강슬래그의 처리효과 검토

A soil stabilization method is an effective and practical remediation alternative for arsenic (As) and heavy metal contaminated farmland soils nearby abandoned metal mine in Korea. This method is a technique whereby amendments are incorporated and mixed with a contaminated soil. Toxic metal bind to the amendments, which reduce their mobility in soil, so the successful stabilization of multi-element contaminated soil depends on the combination of critical elements in the soil and the type of amendments. The objective of this study is to investigate the treatment effects and applicability of limestone (LS) and steel refining slag (SRS) as the amendment for farmland soil contaminated with As and heavy metals, and a lab-column test was conducted for achieving this purpose. The result showed that soil treated with LS and SRS maintained pH buffer capacity and, as a result, the heavy metal leaching concentration was quite low below the water quality standard compared to untreated soil which leachate exceeding the water quality standard was observed, however, the arsenic concentration rather increased with increasing mixture ratio of SRS. This was believed to be related to phosphorus (P) contained in SRS, and dominancy in the competitive adsorption relation between As and P binding strongly to iron might be different according to soil characteristic. We suggested that LS is a effective amendment for reducing heavy metals in soil, and SRS should be used after investigating its applicability based on the adsorption selectivity of arsenic and phosphorus in selected soil.

Sequential extraction and leaching characteristics of heavy metals in abandoned tungsten mine tailings sediments

The chemical speciation of potentially toxic elements (As, Cd, Cu, Pb, and Zn) in the contaminated soils and sulfides-rich tailings sediments of an abandoned tungsten mine in Korea was evaluated by conducting modified BCR sequential extraction tests. Kinetic and static batch leaching tests were also conducted to evaluate the potential release of As and other heavy metals by acidic rain water and the leaching behaviors of these heavy metals. The major sources of the elements were As-, Zn- and Pb-bearing sulfides, Pb carbonates (i.e., cerussite), and Pb sulfates (i.e., anglesite). The biggest pollutant fraction in these soil and tailing samples consists of metals bound to the oxidizable host phase, which can be released into the environment if conditions become oxidative, and/or to residual fractions. No significant difference in total element concentrations was observed between the tailings sediments and contaminated soils. For both sample types, almost no changes occurred in the mobility of As and the other heavy metals at 7 days, but the mobility increased afterwards until the end of the tests at 30 days, regardless of the initial pH. However, the mobility was approximately 5–10 times higher at initial pH 1.0 than at initial pHs of 3.0 and 5.0. The leached amounts of all the heavy metal contents were higher from tailings sediments than from contaminated soils at pH > 3.0, but were lower at pH < 3.0 except for As. Results of this study suggest that further dissolution of heavy metals from soil and tailing samples may occur during extended rainfall, resulting in a serious threat to surface and groundwater in the mine area.

Blood lead levels of residents living around 350 abandoned metal mines in Korea

In 2007, as part of the control and prevention of environmental contamination threatening public health, the Korean Ministry of Environment planned to implement a national biomonitoring survey of three metals: lead, cadmium, and mercury in the blood of residents living near 350 abandoned metal mines known to be contaminated and as possible threats to the health of inhabitants. Thus, we investigated demographic and lifestyle variables and blood lead levels in residents living around the mines and compared them against those of control subjects. We measured the blood lead concentrations in 14,849 subjects (14,132 from nearby the 350 abandoned metal mines and 717 subjects from eight control areas). A questionnaire was provided to all subjects to determine gender, age, mining experience, period of time living in the vicinity of mines, smoking status, and personal perception of abandoned mines as a health risk. The geometric means (95% confidence intervals) of the blood lead levels of residents living around the abandoned metal mines and control areas were 3.017 (2.996-3.037 μg/dL) [female, 2.797 μg/dL (2.771-2.822 μg/dL); male, 3.330 μg/dL (3.298-3.363 μg/dL)] and 2.757 (2.677-2.837 μg/dL) [female, 2.604 μg/dL (2.506-2.700 μg/dL); male, 2.993 μg/dL (2.859-3.126 μg/dL)], respectively. Among residents of the mining areas, nonsmokers and residents who had no mining experience showed significantly lower mean blood lead levels than did smokers, past smokers, and those with mining experience. The mean blood lead concentrations of residents who expressed some concern about the abandoned mines were significantly higher than those of residents without concerns. The mean blood lead concentration of residents living around the abandoned mines was significantly higher than that of residents living in control areas as well as that of the general adult Korean population. We also confirmed that smoking is an important variable to consider, as it increases blood lead concentration.

Extraction of Arsenic and Heavy Metals from Contaminated Mine Tailings by Soil Washing

In this study, the soil washing technique has been used to treat mine tailings contaminated heavily with arsenic and heavy metals at Jingok mine, which is one of the abandoned mines in Korea. The results showed that phosphoric acid, citric acid, oxalic acid, and sodium metabisulfite were highly effective in extracting arsenic and heavy metals. Among them, oxalic acid was the most effective (especially for Pb, Cu, and Zn), as even a residual fraction of arsenic was partly extracted. The optimum concentration of washing reagent and the ratio between the mine tailings and washing reagent were found to be 0.5 M and 1:20, respectively. In addition, the extraction kinetics of arsenic and heavy metals was fast, in which the reaction time of 30 minutes was deemed to be a sufficient contact time. From the results, it may be concluded that the low pH of washing solution and the amount of dissolved Fe may be considered as the most important factors in the extraction of arsenic and heavy metals.

Water quality changes of a closed underground coal mine in Korea

The objective of this study was to assess the changes in mine water quality as an underground mine flooded from July 2005 to October 2008. The effect of air injection with a blower into the water was used to evaluate the potential to convert ferrous to ferric iron and to provide in situ treatment and precipitation. Mine flooding averaged 31cm/day with a linear shape until November 2007, when it flattened out due to outflow. During flooding, mine water pH remained around 6, but Eh shifted from 200 to -150mV. After the mine water level stabilized, contents of elements such as Fe and SO(4) tended to decrease as time passed. Air was injected by diffusers (150L/min/each) at three different depths of 2, 3, and 5m below the water level in the shaft. Dissolved oxygen eventually increased to 4 or 5mg/L depending on the depth of the diffusers. Aeration caused conversion of ferrous iron to ferric iron and about 30mg/l of iron was removed from the mine water. Therefore, air injection shows potential as a semi-active treatment or part of conventional treatment to precipitate iron in the mine pool.

Blood Cadmium Concentration of Residents Around Abandoned Metal Mines in Korea

PP-31-157 Background/Aims: The purpose of this study is to evaluate the blood cadmium concentration and to analyze related factors of residents around the abandoned metal mines in comparison with a control group in Korea. Methods: Blood cadmium concentration was analyzed through investigations of age, sex, working history of mines, periods of residence, smoking habits, and dietary water type of subjects living around abandoned metal mines (exposure group) (n = 14,464) as compared with those living in designated control areas (control group) (n = 697). Results: The blood cadmium concentration (1.25 [1.24–1.27] μg/L) of exposure group was significantly higher than control group (1.17 [1.13–1.22] μg/L). The period of residence and working history of mines in exposure group were significantly higher than control group. The blood cadmium concentration was increased according to increasing age and period of residence in both groups. Blood cadmium concentration of current-smokers in both groups was higher than nonsmokers. Conclusion: This was the first report about the blood cadmium concentration of the exposure group who lived around all abandoned metal mines in Korea. The exposure group had higher blood cadmium concentration than the control group. We attributed the elevated blood cadmium concentration in the abandoned mine residents to the influence of the abandoned mine sites in Korea.

Association of Arsenic Levels in Soil and Drinking Water With Urine of Residents in the Vicinity of Abandoned Metal Mines

PP-31-124 Background/Aims: Many areas near abandoned metal mines in the middle areas of Korea were contaminated by heavy metals (eg, arsenic [As], zinc). Arsenic contamination was much serious in soil and drinking water. However, little is known how exposure of As in environment has affected residents near abandoned metal mines in Korea. The objectives of this study were to investigate the correlation of As levels in soil and drinking water with those in urine of residents near abandoned metal mines (case); and to compare urinary As levels in case areas to those in reference areas. Methods: As levels in soil and drinking water were obtained from a governmental report in 2005. An average As level per each area was calculated and divided by the regulatory limit of As (the environmental risk index) for statistical analyses. To measure urinary As levels, 2091 and 238 subjects were selected from 73 abandoned metal mines and 2 rural areas without metal mines (reference), respectively. The graphite furnace atomic absorption spectrometry was used to analyze urinary As levels. Similarly, the geometric mean of urinary As level per each area was calculated. The number of subjects with urinary As levels above limit was counted and normalized by total subjects of the corresponding area (the high risk rate). We performed a linear regression and student t test using SPSS (version 12.0) to achieve 2 study objectives. Results: The geometric mean of urinary As levels for case areas was 7.17 ± 3.7 mg/L, which was significantly higher than this for reference areas (5.97 ± 2.4) (P < 0.05). Conclusion: These results may suggest that residents near abandoned metal mines may be at high risk of As exposure.

Investigation and Risk Assessment of Heavy Metals Contamination around an Abandoned Metal Mine in Korea

Recently, heavy metals contamination of the agricultural soil and crops surrounding mining areas has been identified as one of the most serious environmental problems in South Korea. The Ministry of the Environment in Korea conducted a Preliminary National Environmental Health Survey (PNEHS) in abandoned metal mines in 2007. The priority for a subsequent detailed examination was ranked from the results of PNEHS. The studied mine which was ranked as being of the highest priority is located in the midwestern part of Korea and was operated from 1911 to 1985. In this study, the contamination levels of the heavy metals in the abandoned metal mine were investigated. From the results, the average daily dose (ADD), target hazard quotient (THQ) and target cancer risk of the heavy metals were evaluated. The concentration of arsenic (As) in all of the tailings from the mine was higher than its countermeasure standard of Korea. In particular, the highest concentration of As, 330 mg/kg, was up to 15 times higher than its countermeasure standard. The average concentration of As in agricultural soils was higher than the warning standard of Korea, and higher than its countermeasure standard at six sites. The average concentrations of the analyzed heavy metals in agricultural soil were below the warning standard, but concentrations of cadmium (Cd) and lead (Pb) at 4 sites were higher than its warning standard. The average concentration of As in surface water exceeded the warning standard of Korea. The value of the THQ of As for the tailings was higher than the health protection standard 1. The value of THQ of As for the farmlands was lower than the standard, while the hazard index (HI) of As was higher than the standard. The value of target cancer risk (TCR) of As, <TEX>$6.44{\times}10^{-4}$</TEX>, were higher than the health protection standard of a lifetime risk for TCR at <TEX>$1{\times}10^{-6}$</TEX>. This suggests that the residents around the metal mines are exposed to As pollution with a carcinogenic risk.