Identification of coal mine water-bursting source using multivariate statistical analysis and tracing test
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ORIGINAL PAPER
Identification of coal mine water-bursting source using multivariate statistical analysis and tracing test Meng Chen 1,2 & Yong Wu 1,2 & Dongdong Gao 1,2 & Ming Chang 1,2
Received: 15 June 2015 / Accepted: 1 December 2016 # Saudi Society for Geosciences 2017
Abstract This study aims to identify the water source of a water-bursting disaster that occurred at the Longmen Gorge South Coal Mine ventilation adit on May 2011. The chosen approach includes the investigation of hydrogeochemical processes of major ions and a tracing test. The relative abundance of major ions is proposed to be Ca2+ > > K++Na+ > Mg for cations and HCO3− > > SO42 − > NO3− > Cl− for anions. A piper diagram of the water samples demonstrates that they are of an HCO3-Ca water type. Principal component analysis implies that the hydrochemistry of water is a result of multiple factors. PC1 represents ion exchange and natural mineral weathering. PC2 and PC3 indicate hydrological processes of agricultural activities and evaporation, respectively. Cluster analysis of water samples is divided into four groups of clusters (group 1–group 4) and suggests a certain homology and similarity between water samples M1/ M2 and S3/S5. The tracer breakthrough curves suggest that there is a large possibility that the injection points are connected with the monitoring points, consistent with t h e C A v i e w. A n a l y s i s a n d r e s e a r c h o f t h e hydrogeochemistry of mine groundwater demonstrate that the use of PCA and CA is a feasible method of identifying the mine’s water-bursting source and determining the possibility of a water-bursting event.
* Yong Wu [email protected]
1
Chengdu University of Technology, No 1, Rd.3, Erxianqiao East, Chengdu 610059, China
2
State Key Laboratory for Geohazard Prevention and Geoenvironment Protection, No 1, Rd.3, Erxianqiao East, Chengdu 610059, China
Keyword Hydrogeochemical . Major ion . Multivariate statistical analysis . Tracing test . Water-bursting source identification
Introduction Groundwater is an important source of drinking water and agricultural production in mining areas. During mining exploration, groundwater can be polluted by the heavy metals and acidic wastewater from the mining area (Rolland et al. 2001; Wisotzky and Obermann 2001; Denimal et al. 2005; Feng et al. 2006; Nikolaidis et al. 2010). In fact, most of those typical pollution problems are influenced by the change in concentration of major ions in the groundwater and surface water in and around the mining area. These changes in water composition can influence drinking water consumed by humans and agricultural production. Mine water-bursting is one of the most serious natural disasters in the coal mine production process. Determining the cause and source of waterbursting as quickly and accurately as possible when the mine water-bursting occurs is a key factor in solving and preventing further water-bursting disasters. Therefore, research designed to improve the accurate identification of the mine water-bursting source is a pr
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