Prediction of coal mine water hazards: a case study from the Huainan Coalfield

2019 ◽  
Vol 12 (3) ◽  
Author(s):  
Yun Qin ◽  
Jun Lu
Keyword(s):  
Coal Mine ◽  
Mine Water ◽  
Huainan Coalfield ◽  
Coal Mine Water ◽  
Water Hazards

Typical Techniques and Equipment for Coal Mine Water Hazards Prevention and Control

2013 ◽  
Vol 448-453 ◽  
pp. 3923-3927
Author(s):  
Hao Wang
Keyword(s):  
Coal Mine ◽  
Mine Water ◽  
Prevention And Control ◽  
Monitoring Technology ◽  
Groundwater Inrush ◽  
Equipment Monitoring ◽  
Coal Mine Water ◽  
And Control ◽  
Water Hazards

Some of the most classical technologies and equipment for coal mine water hazards prevention and control are prevented in this paper. In addition, the application of these technologies and equipment is introduced. The typical technologies and equipment for coal mine water hazards prevention and control can be divided into four groups: exploration technology and equipment; monitoring technology and equipment; forecasting technology and equipment; groundwater inrush controlling technology and equipment.

scholarly journals Isotopic characteristics of D, 18O, 13Cdic, 18Odic, 87Sr/86Sr and their application in coal mine water: a case study

2017 ◽  
Vol 12 (1) ◽  
pp. 97-103
Author(s):  
Song Chen ◽  
Herong Gui
Keyword(s):  
Surface Water ◽  
Coal Mine ◽  
Mine Water ◽  
Major Ions ◽  
Surrounding Rock ◽  
86Sr Ratio ◽  
Groundwater Samples ◽  
Coal Mine Water ◽  
Groundwater Source

In order to understand the isotopic characteristics of coal mine water in diverse aquifers, ten groundwater samples were collected from three aquifers – Quaternary (QA), Coal-bearing (CA), and Limestone (LA) – in Xutuan coal mine, Anhui Province, China. The geochemical characteristics of major ions and isotopes were determined, and the results showed that all of the groundwater samples are HCO3-Na·K or Cl-Na·K types. The concentrations of Na+ + K+ decreased in the order CA > QA > LA, whereas the content of Ca2+ and Mg2+ increased from CA to LA. Groundwater in LA is meteoric in origin, while that in QA is clearly influenced by surface water. The δ13Cdic and δ18Odic in groundwater samples from LA, QA and CA are influenced by the surrounding strata, CO2 and microorganism activity, respectively. The strontium concentration decreases in the sequence LA > CA > QA, but water samples from CA give the highest value of 87Sr/86Sr. Strontium is released by dissolution from the surrounding rock, and the 87Sr/86Sr ratio could be used to identify the groundwater source.

scholarly journals Evolutionary Model of Coal Mine Water Hazards Based on Multi-Agent

2011 ◽  
Vol 2 ◽  
pp. 358-365 ◽  
Author(s):  
Chengzhu Gong ◽  
Lanlan Li ◽  
Kejun Zhu ◽  
Yanhui Gao
Keyword(s):  
Coal Mine ◽  
Mine Water ◽  
Evolutionary Model ◽  
Coal Mine Water ◽  
Multi Agent ◽  
Water Hazards

scholarly journals Electrodialysis of coal mine water

2021 ◽  
Vol 25 ◽  
pp. 100143
Author(s):  
Krzysztof Mitko ◽  
Aleksandra Noszczyk ◽  
Piotr Dydo ◽  
Marian Turek
Keyword(s):  
Coal Mine ◽  
Mine Water ◽  
Coal Mine Water

scholarly journals Directional Drainage Grouting Technology of Coal Mine Water Damage Treatment

2011 ◽  
Vol 26 ◽  
pp. 264-270 ◽  
Author(s):  
Qiucheng Zhang ◽  
Jinhai Li ◽  
Bingshen Liu ◽  
Xiaoguo Chen
Keyword(s):  
Coal Mine ◽  
Mine Water ◽  
Coal Mine Water ◽  
Water Damage

scholarly journals Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency

Separations ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 6
Author(s):  
Yulong Zhang ◽  
Peikun Liu ◽  
Linjing Xiao ◽  
Long Chang ◽  
Fangping Yan ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Coal Mine ◽  
Mine Water ◽  
Regression Models ◽  
Structural Parameters ◽  
Insertion Depth ◽  
Turbidity Removal ◽  
Plate Spacing ◽  
Coal Mine Water ◽  
Flocculation Effect

In this study, a coal mine water flocculation system was established. A series of flocculation tests were carried out at different structural parameters (cylinder height, cone-plate insertion depth and cone-plate spacing) to better investigate the effect of the cone-plate clarifier on coal mine water treatment performance. Sixteen sampling points were set up in the system for data monitoring to generate the required data. The cone-plate clarifier was divided into five zones for flocculation analysis. The increased cylinder height facilitated the flocculation of particles in the micro flocculation zone and the settling of particles in the settlement zone. The chemicals used are polyaluminum chloride (PACl), Fe3O4 and polyacrylamide (PAM), corresponding to doses of 60 mg/L, 40 mg/L and 6 mg/L, respectively. Insufficient insertion depth of the cone-plate will cause the small flocs that have not been fully flocculated to enter the exit pipe zone directly through the cone-plate, while too much insertion depth will cause the large floc in the settlement zone to re-enter the exit pipe zone. The flocculation effect of small flocs increased as the cone-plate spacing decreased, which is consistent with the shallow pool theory. When the cone plate spacing was too narrow, the amount of fluid was reduced and the increase in fluid velocity reduced the flocculation effect. Curve fitting was conducted for Suspended solids(SS) and turbidity removal efficiency under each structural parameter to derive the variation of SS and turbidity removal efficiency under different structural parameters. The regression models of SS and turbidity removal efficiency on the cylinder height, cone-plate insertion depth and cone-plate spacing were established based on the curve fitting results, and the regression models were verified to be well fitted based on the comparison of experimental results. Finally, the optimal values of SS and turbidity removal efficiency were found based on the regression model. The flow rate of the cone-plate clarifier is 0.6 m3/h. The SS removal efficiency reached 96.82% when the cylinder height was 708 mm, the cone-plate insertion depth was 367 mm and the cone-plate spacing was 26 mm. The turbidity removal efficiency reached 86.75% when the cylinder height was 709 mm, the cone-plate insertion depth was 369 mm and the cone-plate spacing was 26 mm.

Sign in / Sign up

Export Citation Format

Share Document