Junzhi Wang¹, Wei Zhao¹, Xinyi Wang^1,2*, Naima A. M. Hersi^1,3, Pingqing Zhang⁴, Xiangyang Sang⁴

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¹ Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo, China.
² Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo, China.
³ School of Environmental Sciences and Technology, The University of Dodoma, Dodoma, Tanzania.
⁴ Ping Dingshan Tian’an Coal Co. Ltd, Pingdingshan, China.
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Abstract: This study focused on analysis of the chemical characteristics of mine waters. The aim of this study is to correlate the degree of different ionic components in mine water and the influence of their convergence using a combination of the three-scale AHP and fuzzy evaluation methods for the comprehensive evaluation of water quality. Ion chromatography (ICS 1100) has been used to analyze the content of the water sample while portable pH/EC/TDS/Tem- perature meters (SX 811 and SX 813) were used to test physical-chemical parameters. The results of this study show that chemistry of in No.11 gushing mine is dominated by HCO₃-Na and HCO₃-Ca, and had a pH between 7.1 and 8.00, belonging to neutral or slightly alkaline water. In addition, water were found to have the hardness between 18 mg/L and 542.5 mg/L. Results also show that the TDS of the roof sandstone and goaves water are higher than Cambrian limestone water, while the turbidity of the mixed water is 20 NTU in the sump, again higher than in other samples such as Cambrian limestone water. Total dissolved solids and the total hardness of Cambrian limestone groundwater mainly depend on the content of K⁺ + Na⁺, Ca²⁺, B={b₁,b₂,…,b_j} and SO^2-₄. Thus, chemical composition changes remarkably after mine water mixing. Results showed that the coal roof sandstone water is class V while that in the sump is class III, and the Cambrian limestone groundwater is class I. In gushing, the quality of water can vary greatly; thus, water from the coal face roof sandstone and the Cambrian limestone should be stored and treated separately before being utilized.

Keywords: Mine Water, Chemical Characteristics, AHP Method, Fuzzy Comprehensive Evaluation Method, Water Quality Comprehensive Evaluation

Cite this paper: Wang, J. , Zhao, W. , Wang, X. , Hersi, N. , Zhang, P. and Sang, X. (2018) Determining the Quality of Mine Gushing and Mixed Water Using Coupled AHP and Fuzzy Comprehensive Evaluation Methods. Journal of Water Resource and Protection, 10, 1185-1197. doi: 10.4236/jwarp.2018.1012070.

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