scholarly journals Environmental impacts at coal waste disposal sites-efficiency of desulphurization technologies

2013 ◽  
Vol 3 (2) ◽  
pp. 109-116 ◽  
Keyword(s):  
Environmental Impacts ◽  
Coal Mine ◽  
Mine Drainage ◽  
Experimental Studies ◽  
Mining Area ◽  
Coal Waste ◽  
Coal Mining Area ◽  
Management Scheme ◽  
Pyrite Content ◽  
Specific Care

During beneficiation of coal at the coal mining area of Tula, Russia, huge volumes of coal wastes with considerable residual pyrite content are produced. These wastes that are usually disposed of without specific care in the environment are active sources of coal mine drainage generation which severely contaminates soils, surface- and groundwater and endangers the ecosystems of the area. In the present paper a complete environmental characterization research is carried out in order to determine the characteristics of the wastes, establish their acid generation potential, the leachability and bio-availability of several hazardous constituents and predict the environmental impacts at the disposal sites. Based on this data as well as on process parameters and disposal practices, an evaluation of desulphurization technologies is carried out. Experimental studies reveal that these wastes are considered as permanent sources of coal mine drainage generation and therefore cause extensive contamination at the disposal sites. In addition, due to several technological constraints of the desulphurization technologies and the characteristics of the wastes, the potential of in situ desulphurization is considered low. Desulphurization technologies present a higher potential only if applied in the framework of an integrated waste management scheme.

scholarly journals Dynamic Evaluation of Water Utilization Efficiency in Large Coal Mining Area Based on Life Cycle Sustainability Assessment Theory

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Junyao Yang ◽  
Liangliang Guo
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Sustainability Assessment ◽  
Electricity Consumption ◽  
Mining Area ◽  
Utilization Efficiency ◽  
Life Cycle Sustainability Assessment ◽  
Water Efficiency ◽  
Water Utilization ◽  
Coal Mining Area

Coal mining enterprises have a variety of water sources, complex drainage structures, long production chain, and many links, which lead to uncoordinated water utilization and low water efficiency. Taking a large coal mining area of China as an example, a dynamic model was established to evaluate the water utilization efficiency based on the Life Cycle Sustainability Assessment (LCSA) theory. In the model, the influence of five aspects (including resources, economy, technology, society, and environment) and 19 factors was considered. The game theory method was adopted to calculate the fusion weights of the 19 factors according to the analytic hierarchy process and CRITIC method. The CW-VIKOR method was used to explain the dynamic evaluation results of water efficiency in the coal mining area. The results show that the environmental impacts of the mining system mainly come from three aspects: regional drainage, domestic sludge landfill and disposal, and water system electricity consumption. Electricity consumption in water systems has the greatest environmental impact, accounting for about 73%, regional drainage for about 26%, and domestic sludge landfill and disposal for about 1%.The CW-VIKOR approach can harmonize the interrelationships among resources, economy, technology, society, and environment. It is an effective method for LCSA of water resource in the coal mining area. The reliability of the evaluation results is high and close to the actual situation. The dynamic model established in this paper is also applicable to other coal mine areas, and only the factor weights need to be modified according to the specific characteristics of each coal mine. The model can provide guidance for optimal exploitation and allocation of coal mine water resources.

scholarly journals Evaluation of Eco-environmental Quality of Coal Mining Area Using Multi-source Data – A Case Regarding Ibei Coalfield, Northwestern China

2021 ◽  
Author(s):  
Huan Jiang ◽  
Gangwei Fan ◽  
Dongsheng Zhang ◽  
Yibo Fan
Keyword(s):  
Spatial Autocorrelation ◽  
Environmental Protection ◽  
Coal Mining ◽  
Environmental Quality ◽  
Coal Mine ◽  
Evaluation System ◽  
Projection Pursuit ◽  
Mining Area ◽  
Coal Mining Area ◽  
The Impact

Abstract Eco-environmental evaluation is a prerequisite for balancing the relationship between coal resource recovery and eco-environmental protection. This paper divides the eco-environment system in coal mining area into 5 subsystems regarding geomorphology, climate, hydrology, land and vegetation, and human activity. Within the 5 subsystems, 13 indicators capable of reflecting eco-environment levels of coal mine fields are selected, weighed using genetic projection pursuit model, and applied to eco-environmental quality evaluation. Based on this, the spatial feature of the quality is analysed using spatial autocorrelation method, recognising the areas that need managements. Factors driving the eco-environment characteristics of coal mines are identified using geographic detector. The feasibility of the developed evaluation system is verified with Ibei Coalfield as a case. The results show that Ibei Coalfield sees a spatially heterogeneous eco-environment pattern. Geographic detector can quantify the impact of various indicators on ecological environment, and the indicator is of stronger interpretation ability as interacting with others. It is also indicated that mining area eco-environment is nonlinearly correlated to impact indicators. The spatial autocorrelation analysis suggests three areas that should be treated strategically, that are the management area, close attention area and protective area. This paper can provide scientific references for mining area eco-environmental protection, which is significant for the sustainability of coal mine projects.

Study on Regulations of Coal Mining under Highway

2013 ◽  
Vol 734-737 ◽  
pp. 666-670
Author(s):  
Wei Nan Deng ◽  
Hua Xing Zhang
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Mining Area ◽  
Coal Production ◽  
Failure Characteristics ◽  
Deformation And Failure ◽  
Coal Mining Area ◽  
Mining Design ◽  
Principal Parts

For guiding coal mining under highway scientifically and systematically, Regulations of coal mining under highway is necessary to be compiled in a few years in China.Base on the study of laws about highway and coal mining and existent regulations about coal mining under other constructions, this paper proposed the principal parts of the regulations according to the deformation and failure characteristics of highway caused by the effect of coal mining.The study provided the supports about theories and mining technologies for extracting unexploited coal under highway, increasing the coal production, optimizing mining design, prolonging the coal mine life and put forward some constructive suggestions for completing the regulations in the coal mining area in China.

Acid mine drainage in an Indian high-sulfur coal mining area: Cytotoxicity assay and remediation study

2020 ◽  
Vol 389 ◽  
pp. 121851 ◽  
Author(s):  
Madhulika Dutta ◽  
Nazrul Islam ◽  
Shahadev Rabha ◽  
Bardwi Narzary ◽  
Manobjyoti Bordoloi ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Coal Mining ◽  
Mine Drainage ◽  
Mining Area ◽  
Cytotoxicity Assay ◽  
Coal Mining Area ◽  
Acid Mine

scholarly journals Geochemistry of acid mine drainage from a coal mining area and processes controlling metal attenuation in stream waters, southern Brazil

2014 ◽  
Vol 86 (2) ◽  
pp. 539-554 ◽  
Author(s):  
VERIDIANA P. CAMPANER ◽  
WANILSON LUIZ-SILVA ◽  
WILSON MACHADO
Keyword(s):  
Chemical Composition ◽  
Coal Mining ◽  
Surface Waters ◽  
Mine Drainage ◽  
Mining Area ◽  
Southern Brazil ◽  
Acid Drainage ◽  
Coal Mining Area ◽  
Brazilian Legislation ◽  
Ph Range

Acid drainage influence on the water and sediment quality was investigated in a coal mining area (southern Brazil). Mine drainage showed pH between 3.2 and 4.6 and elevated concentrations of sulfate, As and metals, of which, Fe, Mn and Zn exceeded the limits for the emission of effluents stated in the Brazilian legislation. Arsenic also exceeded the limit, but only slightly. Groundwater monitoring wells from active mines and tailings piles showed pH interval and chemical concentrations similar to those of mine drainage. However, the river and ground water samples of municipal public water supplies revealed a pH range from 7.2 to 7.5 and low chemical concentrations, although Cd concentration slightly exceeded the limit adopted by Brazilian legislation for groundwater. In general, surface waters showed large pH range (6 to 10.8), and changes caused by acid drainage in the chemical composition of these waters were not very significant. Locally, acid drainage seemed to have dissolved carbonate rocks present in the local stratigraphic sequence, attenuating the dispersion of metals and As. Stream sediments presented anomalies of these elements, which were strongly dependent on the proximity of tailings piles and abandoned mines. We found that precipitation processes in sediments and the dilution of dissolved phases were responsible for the attenuation of the concentrations of the metals and As in the acid drainage and river water mixing zone. In general, a larger influence of mining activities on the chemical composition of the surface waters and sediments was observed when enrichment factors in relation to regional background levels were used.

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