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Natural Resources Research - During the last few decades, open pit mines have been deepened to the remote depths of the ground such that removing great volumes of waste rocks may jeopardize their... 相似文献
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Deriving preference order of post-mining land-uses through MLSA framework: application of an outranking technique 总被引：1，自引：0，他引：1
Hossein Soltanmohammadi Morteza Osanloo Abbas Aghajani Bazzazi 《Environmental Geology》2009,58(4):877-888
This study intends to take advantage of a previously developed framework for mined land suitability analysis (MLSA) consisted
of economical, social, technical and mine site factors to achieve a partial and also a complete pre-order of feasible post-mining
land-uses. Analysis by an outranking multi-attribute decision-making (MADM) technique, called PROMETHEE (preference ranking
organization method for enrichment evaluation), was taken into consideration because of its clear advantages on the field
of MLSA as compared with MADM ranking techniques. Application of the proposed approach on a mined land can be completed through
some successive steps. First, performance of the MLSA attributes is scored locally by each individual decision maker (DM).
Then the assigned performance scores are normalized and the deviation amplitudes of non-dominated alternatives are calculated.
Weights of the attributes are calculated by another MADM technique namely, analytical hierarchy process (AHP) in a separate
procedure. Using the Gaussian preference function beside the weights, the preference indexes of the land-use alternatives
are obtained. Calculation of the outgoing and entering flows of the alternatives and one by one comparison of these values
will lead to partial pre-order of them and calculation of the net flows, will lead to a ranked preference for each land-use.
At the final step, utilizing the PROMETHEE group decision support system which incorporates judgments of all the DMs, a consensual
ranking can be derived. In this paper, preference order of post-mining land-uses for a hypothetical mined land has been derived
according to judgments of one DM to reveal applicability of the proposed approach. 相似文献
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Achieving to some outranking relationships between post mining land uses through mined land suitability analysis 总被引：3，自引：1，他引：2
H. Soltanmohammadi B.Sc. . M.Sc. M. Osanloo B. Rezaei A. Aghajani Bazzazi 《International Journal of Environmental Science and Technology》2008,5(4):535-546
Adoption of most suitable post mining land use is a problem with multi-dimensional nature. There are so many factors in this problem which seriously influence on the decision judgments. Therefore, in this study a fifty-attribute framework for mined land suitability analysis including fifty numbers of economical, social, technical and mine site factors developed to be a foundation for this decision making problem. Analysis by an outranking multi-attribute decision-making technique, called elimination et choix traduisant la realite method, was taken into consideration because of its clear advantages on the field of mined land suitability analysis as compared with multi-attribute decision-making ranking techniques. Analytical hierarchy process method applied to calculate global weights of the attributes through pair wise comparison matrixes. The weights then passed to the elimination et choix traduisant la realit method so that the most efficient post mining land uses could be appointed through comparisons of pair-wise dominance relationships between alternatives. This approach applied to an illustrative example where, final results showed that, there were two non-dominated land-uses for the considered example; industrial and pasture. However by increasing indifference threshold limit, the non-dominated set reduced to a single alternative that was pasture land-use. 相似文献
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An environmental oriented model for optimum cut-off grades in open pit mining projects to minimize acid mine drainage 总被引：2，自引：1，他引：1
F. Rashidinejad M. Osanloo B. Rezai 《International Journal of Environmental Science and Technology》2008,5(2):183-194
Environmental concerns on mining activities started near the end of the 20th century and is still underway. Due to mining activities, the adverse environmental impact has been significant throughout the history of mankind, whereas the minerals produced by mining activities have been providing the basis for human civilization. The legacy of past mining practices is large quantities of acid generating waste materials and tailings that caused abounding acid mine drainage problems. Modern mining environmental management tends to focus on concerns over the impact of waste disposal on surface primarily in the form of tailings and waste materials structures. Sustainable development principles are being increasingly applied by mining companies in developed and developing countries. Operating costs per unit of operation is recognized to be one the most important sustainable mining practice indicator and cut-off grade is considered to be a well-founded representative for this indicator. In this study, a developed model for optimum cut-off grades is presented that not only relies on economical aspects but also minimizes adverse environmental impact in the form of acid mine drainage elimination or mitigation against the approach of postponing the restoration/reclamation activities at the end of the project’s life. 相似文献
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Waste dumps generated from mining that exposes sulfur-bearing overburden can be active sources of acid generation with the potential to severely contaminate soils, surface and groundwater, and endanger both local and downstream ecosystems. A waste rock management strategy ensure that disposal of such material is inert or at least stable and contained, and minimizes the surface footprint of the wastes, and explores options for alternate uses. Reclamation of waste dumps is another or parallel alternative to decrease the potential for adverse effects. At the coal mining area of Karmozd in Iran, large volumes of wastes have been produced and disposed of without any specific care for the environment. In this paper, the impacts of waste dumps on the environment were identified and this was followed by a research program to determine the characteristics of the wastes, their acid generation potential, the availability of hazardous contaminants, and a prediction of their environmental impacts on the site. Data was collected from the target site and by comparing several reclamation alternatives using a Multi-Attribute Decision-Making technique, forestry was selected as the post-mining land use for the waste dumps. Preliminary evaluations indicated that Zelkava could be a useful tree species for this region. 相似文献
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The valuation of a mining project depends upon the accuracy of geological block model. Sampling density, estimation method, and proper block size mainly affect the accuracy of estimated block. This paper aims to answer three questions: (1) which estimation method is more accurate, (2) what is the relation between sampling density and block size, and (3) what the optimum block size is. Conditional Gaussian simulation (CGS) was used to generate a hypothetical deposit, considered as a real block model. A range of different block dimensions were estimated by ordinary kriging, inverse squared distance, and nearest neighbor methods based on tow-simulated drilling grids database. The comparison of estimated and real block grades reveals that increasing the sampling density results the similar outcomes of geostatistics and deterministic interpolation methods. Furthermore, it was deduced that sampling density could not be a viable alternative in choosing appropriate block dimension and the variogram rang a was suggested as an affective parameter in block size selection. Then a geometrical formula was developed to obtain the block size based on the variogram range. The increment in project value that a mine planner can expected from the additional information of the dense drilling grid was also calculated and it was concluded that the block size obtained based on the suggested formula results acceptable information value. Finally, the database of Chador Malu iron ore mine which is located in 180 km northeast of Yazd city in the central part of Iran were used to validate the suggested formula. 相似文献
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