Identification of coal mine water-bursting source using multivariate statistical analysis and tracing test

Chen, Meng; Wu, Yong; Gao, Dongdong; Chang, Ming

doi:10.1007/s12517-016-2779-x

Cited by 18 publications

(6 citation statements)

References 37 publications

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“…It penetrates strata via the primary pores or fractures. During the groundwater cycling, the dissolution of calcite or precipitation may be the source of Ca-HCO 3 type water. , The main groundwater type of zone II is Na-HCO 3 , and it is constituted by most freshwater and a little brackish water, belonging to deep groundwater. This kind of water is formed in a hypoxia environment by the degradation effect of organic matter extensively occurring in the stratum of the study area.…”

Section: Resultsmentioning

confidence: 99%

Source, Age, and Evolution of Coal Measures Water in Central-South Qinshui Basin, China

Wang

Zhang

et al. 2018

Energy Fuels

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Groundwater is one of the important factors controling the accumulation and exploitation of coal measures gas. In this work, a water source identification method based on hydrochemistry, stable isotope, 129I and 14C dating is first established; then, the source, age, and evolution of coal measures water in the Central-South Qinshui Basin are clarified. The results reveal that the hydrogeological environment of coal measures water in Carboniferous-Permian is between semiclosed and open, with free water exchanging. The coal measures water in the Guxian and Shizhuangnan blocks are Ca-HCO3 and Na-HCO3 types, respectively, while the closed coefficients are 1.77 and 322.75, respectively. Therefore, the water is attributed to river water or shallow groundwater in the Guxian block and deep groundwater in the Shizhuangnan block. The age of coal measures water is 1.51–20.61 Ma, which indicates that the water in coal measures at the present stage is a mixture of a little paleo sedimentary water and massive modern meteoric water and that the modern meteoric water recharge lasted until 1950. The above achievements deepen the understanding of the coal measures reservoir type and also guide the optimal selection and co-exploration and -exploitation of coal measures gas.

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Section: Resultsmentioning

confidence: 99%

Source, Age, and Evolution of Coal Measures Water in Central-South Qinshui Basin, China

Wang

Zhang

et al. 2018

Energy Fuels

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“…Sodium hazard is expressed in terms of the percent sodium (Na%) and sodium adsorption ratio (SAR). Water was classified as low (<10), medium (10)(11)(12)(13)(14)(15)(16)(17)(18), high (18)(19)(20)(21)(22)(23)(24)(25)(26), and very high (>26) sodium hazards based on the sodium adsorption ratio [34,35]. In addition, the classification of water-based on percent sodium was classified as excellent (<20%), good (20-40%), permissible (40-60%), doubtful (60-80%), and unsuitable (>80%) [36].…”

Section: Risk Assessment For Irrigationmentioning

confidence: 99%

“…Generally, traditional hydrogeochemical methods can display an obvious overview of groundwater chemical characteristics but often fail to reflect the subtle and critical environmental and geological phenomena in local areas [23,24]. Besides, multivariate statistical methods are nowadays widely applied into groundwater chemistry research in Bangladesh and the Middle East, such as factor analysis, cluster analysis, and principal component analysis (PCA) [25][26][27][28]. Based on multivariate statistical methods, suitability of groundwater quality were assessed for irrigation and drinking, and the chemical origins of groundwater can be identified as well [29,30].…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical Evolution and Quality Assessment of Groundwater in the Sanjiang Plain, China

Zhou

Lü

et al. 2022

Water

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Groundwater is subjected to contamination threats from human activities, such as agriculture, especially long-term farming in the Sanjiang Plain, China. Identifying the sources and distribution of pollution is essential for its reasonable prevention and control. In this study, we analysed the chemical characteristics of 389 samples at 60 shallow groundwater monitoring points from 2011 to 2015 in the Sanjiang Plain using traditional hydrochemical methods, water quality assessment, Pearson’s correlation, and principal component analysis (PCA). Although groundwater type in this area was predominantly HCO3-Ca·Mg, three forms of nitrogen pollution (ammonia, nitrate, and nitrite) were all detected in this area. The interaction of natural geochemical and anthropogenic factors during hydrochemical formation is confirmed by the high coefficients of variation and Gibbs plots of the main ions in the water. The overall shallow groundwater situation was described as good, with more than 40% and 90% of groundwater samples suitable for drinking and irrigation according to the quality assessment, respectively. The proportion of poor water quality in the wet season was higher than that in the dry season. NO3-N and NH3-N were identified as the major anthropogenic pollutants in the study area. Results from Pearson’s correlation and principal component analysis shows two main pollutants fall into two chemical controlling factors together with natural chemical parameters, which implies that the migration and transformation of pollutants may have affected the overall hydrochemical characteristics of the regional groundwater. Therefore, findings from this paper can provide insight into the chemical evolution of groundwater in response to long-term agricultural activities and can help contribute to better management of groundwater resources and agricultural sustainable development.

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“…These salts, and their resulting chloride ions, come from coal seam minerals. Medium diffusion in coal changed the Cl − ion concentration in the coal seam fissure water, and as a result of anthropogenic impacts (Chen et al 2017). The concentration of Cl − in the coal seam fissure water of wells Z-7H and Z-159 was altered following nutrition medium injection, showing significant variations in Clconcentrations due to the effects of nutrition distribution.…”

Section: Medium Diffusion In Coal Bedmentioning

confidence: 99%

Primary studies on the effect of coal bio-gasification in situ in the Qinshui basin

Xiao

Zhang

et al. 2021

J Petrol Explor Prod Technol

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Coal bio-gasification is one in situ coal gasification technology that utilizes the digestion of organic components in coal by methanogenic bacteria. It is not only an effective technology to enhance the recoverable reserves of coalbed methane, but also an important technical method to promote clean coal utilization. Relevant laboratory researches have confirmed the technical feasibility of anthracite bio-gasification. However, in the complex environment of coal bed, whether in situ gas can be yield with methanogenic bacteria needs to be verified by in situ experiments. In this study, a vertical well and a horizontal well were used in Qinshui basin to perform field experiments to confirm the technical industrial feasibility. The concentration of Cl− ion and number changes of Methanogen spp. were used to trace nutrition diffusion. Gas production changes and coalbed biome evolution were used to analyze technical implementation results. The trace data and biome evolution identified that: (1) The development of Methanoculleus spp. has a significant positive correlation with culture medium diffusion; (2) the structure of coalbed microbial community was significantly changed with the injection of nutrition, and the newly constructed methanogenic community was more suitable for fermentation of coal; and (3) the evolution of dominant microflora has further enhanced bio-gasification of coal. Gas production data showed that the gasification of coal lasted 635 and 799 days and yielded 74,817 m3 and 251,754 m3 coalbed methane in Z-159 and Z-7H wells, respectively. One nutrition injection in coalbed achieved an average of 717 days of continuous gas production in experimental wells. Results confirmed that coalbed methane enhancement with bio-gasification of coal is a potential technology to achieve the productivity improvement of coalbed methane wells. And the findings of this study can help to further understand the mechanism of in situ coal bio-gasification and provide theoretical support for the development of biomining of coal.

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Identification of coal mine water-bursting source using multivariate statistical analysis and tracing test

Cited by 18 publications

References 37 publications

Source, Age, and Evolution of Coal Measures Water in Central-South Qinshui Basin, China

Source, Age, and Evolution of Coal Measures Water in Central-South Qinshui Basin, China

Hydrochemical Evolution and Quality Assessment of Groundwater in the Sanjiang Plain, China

Primary studies on the effect of coal bio-gasification in situ in the Qinshui basin

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