scholarly journals Hydrogeochemical Characteristics and Water Quality Evaluation of Carboniferous Taiyuan Formation Limestone Water in Sulin Mining Area in Northern Anhui, China

2019 ◽  
Vol 16 (14) ◽  
pp. 2512 ◽  
Author(s):  
Meichen Wang ◽  
Herong Gui ◽  
Rongjie Hu ◽  
Honghai Zhao ◽  
Jun Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Comprehensive Evaluation ◽  
Water Source ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Mining Areas ◽  
Taiyuan Formation ◽  
Development And Utilization ◽  
Huaibei Coalfield ◽  
Type Water

The Taiyuan formation limestone water in the Huaibei coalfield is not only the water source for coal mining, but also the water source for industry and agriculture in mining areas. Its hydrogeochemical characteristics and water quality are generally concerning. In this paper, conventional ion tests were carried out on the Taiyuan formation limestone water of 16 coal mines in the Sunan and Linhuan mining areas of the Huaibei coalfield. Piper trigram, Gibbs diagram and an ion scale coefficient map were used to analyze the hydrogeochemical characteristics of the Taiyuan formation limestone water. The water quality was evaluated in a fuzzy comprehensive manner. The results show that the main cation and anion contents in the Taiyuan formation limestone water were Na+ > Mg2+ > Ca2+ > K+, SO42− > HCO3− > Cl−. There were differences in the hydrogeochemical types of the Taiyuan formation limestone water in the two mining areas; HCO3-Na type water was dominant in the Sunan mining area and SO4·Cl-Na type water was dominant in the Linhuan mining area. The chemical composition of the Taiyuan formation limestone water is mainly affected by the weathering of the rock and is related to the dissolution of the evaporated salt and the weathering of the silicate. The fuzzy comprehensive evaluation results show that the V-type water accounts for a large proportion of the Taiyuan formation limestone water in the study area and the water quality is poor. This study provides a basis for the development and utilization of the Taiyuan formation limestone water and water environmental protection in the future.

scholarly journals Comparison and Analysis of Resource and Environmental Carrying Capacity of Typical Rare Earth Mining Areas in China

2021 ◽  
Author(s):  
Jingjing Bai ◽  
Xin Xu ◽  
Yaoting Duan ◽  
Guangyu Zhang ◽  
Zhe Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Carrying Capacity ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Mining Areas ◽  
Assignment Method ◽  
Environmental Carrying Capacity ◽  
Bayan Obo

Abstract Rare earth is a non-renewable and important strategic resource, and China is rich in rare earth resources. However, the process of massive exploitation has caused the migration, diffusion transformation and accumulation of pollution sources, which in turn has a profound impact on the ecological environment of mining areas. Accurate evaluation of resource and environmental carrying capacity (RECC) is important for the green development of mining areas. In this paper, the fuzzy comprehensive evaluation method based on AHP and entropy combination assignment method is used to study the RECC of mine area in terms of both support capacity and pressure. The Bayan Obo mine in Inner Mongolia; Longnan mine in Jiangxi; Weishan mine in Shandong; Mianning mine in Sichuan; Pingyuan mine in Guangdong; and Chongzuo mine in Guangxi, which have typical representatives, were selected for the horizontal comparison. The results show that, with the exception of Bayan Obo, the support index is greater than the pressure from mining and human activities in all the mining areas. The RECC index ranks for each mining area were: Bayan Obo > Longnan > Mianning > Pingyuan > Weishan > Chongzuo. In addition, an obstacle degree model was used to identify and extract the main factors affecting the ecological quality of the mine site. The ratio of investment in environmental pollution control to GDP is the most important factor limiting the improvement of the mine support index. The results of this paper were given for the different evolutionary processes and differences of RECC in typical rare earth mining areas, which could provide valuable references for achieving the green and comprehensive development of rare earth industry.

scholarly journals Assessment of Land Reclamation Benefits in Mining Areas Using Fuzzy Comprehensive Evaluation

2020 ◽  
Vol 12 (5) ◽  
pp. 2015 ◽  
Author(s):  
Xueyi Yu ◽  
Chi Mu ◽  
Dongdong Zhang
Keyword(s):  
Coal Mine ◽  
Land Reclamation ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Criteria ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Scoring Method ◽  
Land Type ◽  
Mining Areas

Land reclamation plays a vital role in the ecological improvement and economic development of mining regions. This study aims to conduct a preliminary discussion on the evaluation content, evaluation methods, and evaluation indicators of land reclamation benefits in mining areas. Using fuzzy comprehensive evaluation (FCE) method, land reclamation was assessed. After compiling a model of the land reclamation influencing factors, an evaluation index of land reclamation benefit in the mining area was constructed using the land reclamation monitoring data for the northern part of the mining area over the last decade. In addition, an expert scoring method and a traditional evaluation model were used to estimate the comprehensive benefits of land reclamation at Hanjiawan coal mine in Shendong mining area. Land reclamation markedly improved the land type within the mining region and decreased the amount of damaged land, including subsided and occupied land. Moreover, land reclamation improved the available land area such as agricultural and construction land. The proposed model obtained an overall 63% increase in the land reclamation area. Different degrees of ecological, economic, and social benefits of Hanjiawan coal mine were observed; however, the ecological benefits were the most significant, with a growth rate of 56%. Based on the evaluation criteria, all benefits of the mining area after reclamation were good. Over time, land reclamation will offer greater comprehensive benefits to the mining area. Furthermore, this method can be used for precise evaluation of comprehensive benefits after land reclamation, and the assessment results will provide a reference basis for sustainable development of the mining area.

scholarly journals The hydrochemical characteristics and quality assessment of groundwater in Shuangliao City, China

2019 ◽  
Vol 98 ◽  
pp. 01034 ◽  
Author(s):  
Mingjun Liu ◽  
Changlai Xiao ◽  
Xiujuan Liang
Keyword(s):  
Groundwater Quality ◽  
Human Activities ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Hydrochemical Characteristics ◽  
Analytic Hierarchy ◽  
Liaohe River ◽  
Geological Conditions ◽  
Type Water

In this study, a hydrochemical investigation was conducted in Shuangliao city to identify the hydrochemical characteristics and the quality of groundwater using descriptive statistics and correlation matrices. And on that basis, combined with Analytic hierarchy process (AHP), an improved two-level fuzzy comprehensive evaluation method is used to evaluate the groundwater quality. The results indicate that the major cations and anions in groundwater are Ca2+ and HCO3-, respectively. The chemical types are mainly HCO3—Ca type water, some areas are complicated due to the influence of human activities. The evaluation results show that the water quality in the area is mostly III type water, and the groundwater quality in some areas is IV or V water due to the influence of primary geological conditions or human activities. The groundwater quality in the East Liaohe River Valley and Shuangliao urban area is relatively poor, and in the northwest part which is the saline alkali soil area is also relatively poor.

Variabilities of Surface Water Quality of Degraded Post-mining Areas in Bytom

2021 ◽  
Vol 23 ◽  
pp. 318-331
Author(s):  
Aleksandra Czajkowska ◽  
Łukasz Gawor
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Ph Value ◽  
Surface Water Quality ◽  
Water Hardness ◽  
Total Content ◽  
Mining Area ◽  
Physicochemical Analysis ◽  
High Concentration ◽  
Mining Areas

In the paper there is presented an evaluation of variability of surface water quality (reservoirs and watercourses), on the area of degraded post-mining area in Bytom. The physicochemical analysis of water and compared with archival data obtained in 2009 and 2014. There were done analysis of following parameters: reaction, total content of substances dissolved in water, water hardness and the content of: Cl-, SO42-, HCO3-, Ca2+, Mg2+, K+, Na+, NH4+, NO3-, NO2-, PO4- ions as well as Fe and Mn. The examined surface waters were characterised by high content of solutes. Anions were dominated by chlorides, the sodium proved to be the dominating cation, the examined water samples were characterised by high concentration of sulphates. In all analyzed reservoirs, permissible concentrations of chlorides and sulphates were exceeded. In all sample points there was observed a decrease of pH value in long term period, the concentration of chlorides lowered, however concentrations of sulphates increased in the majority of sampling points.

scholarly journals Hydrochemical characteristics and water quality evaluation of shallow groundwater in Suxian mining area, Huaibei coalfield, China

2020 ◽  
Vol 7 (4) ◽  
pp. 825-835
Author(s):  
Hao Yu ◽  
Herong Gui ◽  
Honghai Zhao ◽  
Meichen Wang ◽  
Jun Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Major Ions ◽  
Shallow Groundwater ◽  
Mining Area ◽  
Water Quality Evaluation ◽  
Groundwater Samples ◽  
Silicate Dissolution ◽  
Huaibei Coalfield ◽  
Main Factor

AbstractThe aim of this study is to evaluate the hydrogeochemical characteristics and water environmental quality of shallow groundwater in the Suxian mining area of Huaibei coalfield, China. The natural formation process of shallow groundwater in Suxian is explored using Piper trilinear charts and Gibbs diagrams, and by examining the ratios between the major ions. United States Salinity Laboratory (USSL) charts, Wilcox diagrams, and the water quality index (WQI) are further employed to quantify the differences in water quality. The results reveal that the main hydrochemical facies of groundwater are HCO3–Ca, and that silicate dissolution is the main factor controlling the ion content in shallow groundwater. The USSL charts and Wilcox diagrams show that most of the water samples would be acceptable for use in irrigation systems. The WQI results for each water sample are compared and analyzed, and the quality of groundwater samples around collapse ponds is found to be relatively poor.

Fuzzy Comprehensive Evaluation on Multiple Constraint Factors of City Underground Space Development and Utilization

2013 ◽  
Vol 357-360 ◽  
pp. 1783-1788
Author(s):  
Chang An Zhou ◽  
Hong Ren ◽  
Jing Yang Zhou
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Process ◽  
Fuzzy Comprehensive Evaluation ◽  
Evaluation Index System ◽  
Underground Space ◽  
Analytic Hierarchy ◽  
Constraint Factors ◽  
Multiple Constraint ◽  
Development And Utilization

In order to solve the existent problems of incomplete and ambiguous information during the evaluation on the multiple constraints factors of city underground space development and utilization, this paper applies analytic hierarchy process and fuzzy comprehensive evaluation method to construct the comprehensive evaluation index system of the multiple constraint factors of city underground space development and utilization, then Yuzhong District, Yubei District, Beibei District in Chongqing respectively as an example, and comprehensively to evaluate the multiple constraint factors of city underground space development and utilization. Example analysis shows that, it has high feasibility and effectiveness that applies the method of fuzzy comprehensive evaluation to the multiple constraint factors of city underground space development and utilization, and it can contribute to solve fuzziness and uncertainty problems of the evaluation process.

Fuzzy Mathematics Applied to Heavy Metal Pollution in the Marine Environment, the Calculation of Water Quality Assessment - A Case Study of Lianyungang Marine

2011 ◽  
Vol 356-360 ◽  
pp. 2124-2130
Author(s):  
Wen Bin Chen
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Environmental Pollution ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Comprehensive Evaluation ◽  
Standard Form ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Mathematics ◽  
Membership Matrix

Reference fuzzy mathematics of fuzzy comprehensive evaluation method, Select a representative indicator of pollutants to establish fuzzy comprehensive evaluation index system to evaluate the virulence of Lianyungang marine heavy metal pollution levels; by the monitoring data to establish indicators of each factor on the degree of membership at all levels of the standard form a membership matrix, then make the weight factor multiplied by the membership matrix, get the fuzzy product, obtain a comprehensive evaluation set which indicating that water quality standards for water quality at all levels of membership level, reflecting the ambiguity of comprehensive water quality level, then based on the message obtain the integrated environmental pollution of Lianyungang Marine, provide the scientific basis of environmental pollution control for Lianyungang Marine.

Comprehensive Evaluation on Multiple Constraint Elements of City Underground Space Development and Utilization Based on Analytic Hierarchy Process and Fuzzy Comprehensive Evaluation Method

2013 ◽  
Vol 357-360 ◽  
pp. 2754-2758
Author(s):  
Chang An Zhou ◽  
Can Chen ◽  
Hong Ren
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Evaluation Index System ◽  
Underground Space ◽  
Analytic Hierarchy ◽  
Comprehensive Evaluation Method ◽  
Multiple Constraint ◽  
Development And Utilization ◽  
Hierarchy Process

According to constraint elements more and more appearing in the comprehensive forms, and at present it only considers that single constraint element of city underground space development and utilization has been unable to reflect the actual situation. On the basis of the main characteristics of city underground space development and utilization, this paper aims to analyze various factors which may cause the consequence and the frequency of appearance, and to construct evaluation index system of city underground space development and utilization which is composed of 5 one-level indexes, 20 two-level indexes of evaluation index system of multiple constraint factors of city underground space development and utilization, and to use the analytic hierarchy process and fuzzy comprehensive evaluation method to analyze and evaluate the influence on city underground space development and utilization. Analysis of the example application shows that, it only considers single constraint element of city underground space development and utilization is not comprehensive, and not science, and it needs to consider the correlation between various constraint elements.

The Distribution Laws of Interlayer-Gliding Structure Controlled by Panji Anticline and the Research of Quantitative Evaluation in Seams

2012 ◽  
Vol 204-208 ◽  
pp. 3-9
Author(s):  
Qi Lang Le
Keyword(s):  
Coal Mine ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Fracture Type ◽  
Comprehensive Evaluation Method ◽  
Geological Conditions ◽  
Shallow Area ◽  
Gliding Structure

Based on the research of interlayer-gliding structures in Panbei and Panji No.1 coal mine that are located in the each wing of Panji anticline, the Panji mining area is divided into 9 main interlayer-gliding areas and 29 sub-regions. The results indicate that the interlayer-gliding structures mainly developed in the anticline wings, which show obvious symmetry at the type and distribution. The types of the interlayer-gliding structures are fault-sliding and corrugation type in the wings and fracture type in the core area. The type and manifestation of the interlayer-gliding structures also show symmetry in the similar depth. From up to down, the interlayer-gliding type show obvious regularity that fracture type is mainly developed in the shallow area, down is fault-sliding type and corrugation type is mainly developed in the deep or the interchange of the faults. Take fuzzy comprehensive evaluation method to evaluate the inter-gliding structure in west area of Panji No.1 coal mine. The results showed that the results from using fuzzy comprehensive assessment were similar with the results exposed by coal mine. Good effects were obtained for predicting the development intensity of the seam-gliding structure in deep unmined areas in combination with geological conditions of coal mine, providing references for production arrangement of coal mine.

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