- Email: [email protected]
Reclaiming and abandoned placer mine site in Alask
EXCAVATIONS:GROUNDWATER
95A
962383 Closure concerns at Sonora Mining's Jamestone Mine A. Dahlstrand, Mining Engineering, 47(3), 1995, pp 236-239. The mine's close proximity to the town of Jamestown has made it a highly visible operation. Due to its location and local opposition, the Jamestown operation and production schedule has been impacted by concerns related to noise, air quality, blasting water quality and wildlife. As a result, the Jamestown Mine built into its operations phase intensified efforts in monitoring, concurrent reclamation, wildlife buffers and a landscape-screening plan. Closing the open-pit mining operation has required resolution of numerous issues. Reclamation and closure involve environmental protection issues, community issues and people issues. The obvious and often most expensive of them is the physical reclamation of mining disturbance and the elimination and long-term commitments and maintenance. (from Author)
962357 Acid mine drainage in karat terranes: geochemical consideratioas and field observations I. D. Sasowsky, W. B. White & J. A. Webb, in: Kurst geohazards: engineering and environmental problems in karst terrane. Proc. 5th conference, Gatlinburg 1995, ed B.F. Beck, (Balkema), 1995, pp 241-247. Acid mine water chemistry persists through the conduit system so that the spring waters contain substantial iron and aluminum and have pH values as low as 4.2. Although neutralization of acid water does take place in the karst system, even an 8 km reach of conduit is not sufficient to take the process to completion. Fast moving water within karst conduits, relatively sluggish reaction kinetics, and a natural armoring of the conduit walls by the precipitation of iron compounds all conspire to make the neutralization of acidity in karst systems a relatively inefficient process. (from Authors)
962384 Reclaiming and abandoned placer mine site in Alaska M. G. Nelson, E. C. Packec Jr & D. J. Helm, Mining Engineering, 47(3), 1995, pp 240-242. Many of Alaska's abandoned placer mine sites are not covered under existing regulations. In many cases, the claims have been abandoned. These sites have not been stabilized. They are considered as possible sources for nonpoint pollution. Many of the unreclaimed sites are found along roads to popular tourist sites. Reclamation techniques for placer mine sites are being developed for northern regions. Stabilization methods for streams and rivers appear to have much in common with those used farther south. But they are also subject to complications unique to northern regions, such as the formation of aufeiss. Natural revegetation appears to be possible for northern placer mine sites. However, it may take place more slowly. (from Authors)
962388 Using metal-tolerant plants to reclaim mining wastes D. R. Morrey, Mining Engineering, 47(3), 1995, pp 247-249. Efforts have focused on the ecological analysis of plant communities that occur over a range of metalliferous mining wastes. Investigations have been performed on the mechanisms that allow selected varieties of plant species to survive in normally phytotoxie environments and on the potential applications of metal-tolerant varieties of plant species. The purpose is the remediation and reclamation of mining wastes and soils that contain unusually high concentrations of heavy metals. (from Author)
962385 Evaluating the potential impacts of mine wastes on ground and surface waters D. J. Herzog & F. M. Forsgren, Mining Engineering, 47(3), 1995, pp 254-256. There are two steps in evaluating potential mine waste impacts on ground and surface waters. Characterize the mine waste (characterization methodologies) and assess potential impacts (assessment strategies). Strategies discussed in this paper to evaluate potential impacts were developed during investigations at precious metal and base metal mines in Nevada. Water resources in Nevada consist mostly of ground water. So the strategies discussed focus on potential impacts to ground water. However, several of these strategies also apply to assessing potential impacts to surface water. (from Authors) 962386 Passive-treatment of acid rock drainage: what is the potential bottom line? J. J. Gusek, Mining Engineering, 47(3), 1995, pp 250-253. Passive-treatment systems that mitigate acid-rock drainage from coal mines have operated since the mid-1980s. Large systems at metal mines are being contemplated. A typical man-made passive-treatment-system can mimic a natural wetland by employing the same geochemical principles. Passive-treatment systems, however, are engineered to optimize the biogeochemical processes occurring in a natural wetland ecosystem. The passive-treatment methodology holds promise over chemical neutralization because large volumes of sludge are not generated. Metals may be precipitated as oxides, sulfides or carbonates in the passive-treatment system substrate the key goal of a passive-treatment system is the long-term immobilization of metals in the substrate materials. The passive-treatment technique may not be applicable in all mine-drainage situations. (from Author)
962389 East Germany's post-lignite landscapes U. Ballay, Mining Environmental Management, 3(1), 1995, pp 18-20. Abandoned excavations and waste dumps stretch for kilometres across Mitteldeutsch Brannkohlengesellschaft mbH (Mibrag)'s coalfields south of Leipzig and among Lausitzer Brannkohle AG (Laubag)'s pits near the Polish border in northern Saxony and southern Brandenburg. The Lausitz region produced 200 Mt/y of lignite through the 1980s and, in the central mining belt between Finsterwalda and Hoyerswerda, opencast mines so dominate the landscape that the task is to rehabilitate an entire region. Further north over one quarter of a 230 000 ha site around Cottbus bears the imprint of lignite mining. (from Author) 962390 Forest-biological erosion control on coni-mine spoil banks in Bnigada M. J. Haigh, Sv. Gentcheva-Kostadinova & E. Zheleva, in: Carrying the torchfor erosion control: an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 385-396. Environmental monitoring in Bulgaria demonstrates that forestation can moderate soil pH (from pH > 3.0 to pH < 4.0), and help reduce soil bulk density (from 0.97 to > 1.3 g/ era~ in the 0-5 era layer) in the case of coal briquette spoils at Pernik, near Sofia. Ground losses from forested, 16-17 ° slope, coal briquette-soils at Pernik are a quarter of those from an entirely unvegetated section of the same embankment. Slopes protected by mechanical means alone did not allow soil growth and, where the structures broke down, they suffered as much erosion as untreated sites. (from Authors) 962391 Optimal management models for water drainage, water supply and environmental protection in coal mines in north China (in Chinese) Wu Qiang, Jin Yujie, Luo Yuanhua, Xia Yonghua & Li Dean, Journal - China Coal Society, 20(1), 1995, pp 93-98. Long-term drainage in coal mines has resulted in increasingly acute contractions between water drainage and water supply, and has also caused a series of severe environmental geological problems. This paper presents narrow sense and
95A
962383 Closure concerns at Sonora Mining's Jamestone Mine A. Dahlstrand, Mining Engineering, 47(3), 1995, pp 236-239. The mine's close proximity to the town of Jamestown has made it a highly visible operation. Due to its location and local opposition, the Jamestown operation and production schedule has been impacted by concerns related to noise, air quality, blasting water quality and wildlife. As a result, the Jamestown Mine built into its operations phase intensified efforts in monitoring, concurrent reclamation, wildlife buffers and a landscape-screening plan. Closing the open-pit mining operation has required resolution of numerous issues. Reclamation and closure involve environmental protection issues, community issues and people issues. The obvious and often most expensive of them is the physical reclamation of mining disturbance and the elimination and long-term commitments and maintenance. (from Author)
962357 Acid mine drainage in karat terranes: geochemical consideratioas and field observations I. D. Sasowsky, W. B. White & J. A. Webb, in: Kurst geohazards: engineering and environmental problems in karst terrane. Proc. 5th conference, Gatlinburg 1995, ed B.F. Beck, (Balkema), 1995, pp 241-247. Acid mine water chemistry persists through the conduit system so that the spring waters contain substantial iron and aluminum and have pH values as low as 4.2. Although neutralization of acid water does take place in the karst system, even an 8 km reach of conduit is not sufficient to take the process to completion. Fast moving water within karst conduits, relatively sluggish reaction kinetics, and a natural armoring of the conduit walls by the precipitation of iron compounds all conspire to make the neutralization of acidity in karst systems a relatively inefficient process. (from Authors)
962384 Reclaiming and abandoned placer mine site in Alaska M. G. Nelson, E. C. Packec Jr & D. J. Helm, Mining Engineering, 47(3), 1995, pp 240-242. Many of Alaska's abandoned placer mine sites are not covered under existing regulations. In many cases, the claims have been abandoned. These sites have not been stabilized. They are considered as possible sources for nonpoint pollution. Many of the unreclaimed sites are found along roads to popular tourist sites. Reclamation techniques for placer mine sites are being developed for northern regions. Stabilization methods for streams and rivers appear to have much in common with those used farther south. But they are also subject to complications unique to northern regions, such as the formation of aufeiss. Natural revegetation appears to be possible for northern placer mine sites. However, it may take place more slowly. (from Authors)
962388 Using metal-tolerant plants to reclaim mining wastes D. R. Morrey, Mining Engineering, 47(3), 1995, pp 247-249. Efforts have focused on the ecological analysis of plant communities that occur over a range of metalliferous mining wastes. Investigations have been performed on the mechanisms that allow selected varieties of plant species to survive in normally phytotoxie environments and on the potential applications of metal-tolerant varieties of plant species. The purpose is the remediation and reclamation of mining wastes and soils that contain unusually high concentrations of heavy metals. (from Author)
962385 Evaluating the potential impacts of mine wastes on ground and surface waters D. J. Herzog & F. M. Forsgren, Mining Engineering, 47(3), 1995, pp 254-256. There are two steps in evaluating potential mine waste impacts on ground and surface waters. Characterize the mine waste (characterization methodologies) and assess potential impacts (assessment strategies). Strategies discussed in this paper to evaluate potential impacts were developed during investigations at precious metal and base metal mines in Nevada. Water resources in Nevada consist mostly of ground water. So the strategies discussed focus on potential impacts to ground water. However, several of these strategies also apply to assessing potential impacts to surface water. (from Authors) 962386 Passive-treatment of acid rock drainage: what is the potential bottom line? J. J. Gusek, Mining Engineering, 47(3), 1995, pp 250-253. Passive-treatment systems that mitigate acid-rock drainage from coal mines have operated since the mid-1980s. Large systems at metal mines are being contemplated. A typical man-made passive-treatment-system can mimic a natural wetland by employing the same geochemical principles. Passive-treatment systems, however, are engineered to optimize the biogeochemical processes occurring in a natural wetland ecosystem. The passive-treatment methodology holds promise over chemical neutralization because large volumes of sludge are not generated. Metals may be precipitated as oxides, sulfides or carbonates in the passive-treatment system substrate the key goal of a passive-treatment system is the long-term immobilization of metals in the substrate materials. The passive-treatment technique may not be applicable in all mine-drainage situations. (from Author)
962389 East Germany's post-lignite landscapes U. Ballay, Mining Environmental Management, 3(1), 1995, pp 18-20. Abandoned excavations and waste dumps stretch for kilometres across Mitteldeutsch Brannkohlengesellschaft mbH (Mibrag)'s coalfields south of Leipzig and among Lausitzer Brannkohle AG (Laubag)'s pits near the Polish border in northern Saxony and southern Brandenburg. The Lausitz region produced 200 Mt/y of lignite through the 1980s and, in the central mining belt between Finsterwalda and Hoyerswerda, opencast mines so dominate the landscape that the task is to rehabilitate an entire region. Further north over one quarter of a 230 000 ha site around Cottbus bears the imprint of lignite mining. (from Author) 962390 Forest-biological erosion control on coni-mine spoil banks in Bnigada M. J. Haigh, Sv. Gentcheva-Kostadinova & E. Zheleva, in: Carrying the torchfor erosion control: an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 385-396. Environmental monitoring in Bulgaria demonstrates that forestation can moderate soil pH (from pH > 3.0 to pH < 4.0), and help reduce soil bulk density (from 0.97 to > 1.3 g/ era~ in the 0-5 era layer) in the case of coal briquette spoils at Pernik, near Sofia. Ground losses from forested, 16-17 ° slope, coal briquette-soils at Pernik are a quarter of those from an entirely unvegetated section of the same embankment. Slopes protected by mechanical means alone did not allow soil growth and, where the structures broke down, they suffered as much erosion as untreated sites. (from Authors) 962391 Optimal management models for water drainage, water supply and environmental protection in coal mines in north China (in Chinese) Wu Qiang, Jin Yujie, Luo Yuanhua, Xia Yonghua & Li Dean, Journal - China Coal Society, 20(1), 1995, pp 93-98. Long-term drainage in coal mines has resulted in increasingly acute contractions between water drainage and water supply, and has also caused a series of severe environmental geological problems. This paper presents narrow sense and