Hydrogeologic setting and simulation of groundwater flow near the Canterbury and Leadville Mine Drainage Tunnels, Leadville, Colorado

2011 ◽  
Author(s):  
Tristan P. Wellman ◽  
Suzanne S. Paschke ◽  
Burke Minsley ◽  
Jean A. Dupree
Keyword(s):  
Groundwater Flow ◽  
Mine Drainage ◽  
Hydrogeologic Setting

Numerical Simulation on Water Invasion of Coal Mine

2013 ◽  
Vol 316-317 ◽  
pp. 1112-1117 ◽  
Author(s):  
Ai Jun Shao ◽  
Yuan Huang ◽  
Qing Xin Meng
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Groundwater Flow ◽  
Water Level ◽  
Coal Mining ◽  
Coal Mine ◽  
Mine Drainage ◽  
Model Verification ◽  
Mine Area ◽  
Hydrogeological Conditions

This paper presents the numerical simulation of groundwater flow and the prediction of drainage in the No.5 mine of the Feng-feng coal mine area, using the data from a water invasion. First of all, we build a mathematical model of groundwater flow according to the hydrogeological conditions. Then, the model is verified by the water invasion data. The measured and simulated water level fit well during the model verification. At last, the mine drainage was predicted using the established model. The results indicated that the coal mining below -100m would result in a large amount of drainage and relative high cost.

scholarly journals The Significance of Groundwater Flow Modeling Study for Simulation of Opencast Mine Dewatering, Flooding, and the Environmental Impact

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 848 ◽  
Author(s):  
Jacek Szczepiński
Keyword(s):  
Environmental Impact ◽  
Groundwater Flow ◽  
Mine Drainage ◽  
Numerical Models ◽  
Open Pit ◽  
Climate Conditions ◽  
Aquifer System ◽  
Flow Models ◽  
Mine Dewatering ◽  
Cyclic Changes

Simulations of open pit mines dewatering, their flooding, and environmental impact assessment are performed using groundwater flow models. They must take into consideration both regional groundwater conditions and the specificity of mine dewatering operations. This method has been used to a great extent in Polish opencast mines since the 1970s. However, the use of numerical models in mining hydrogeology has certain limitations resulting from existing uncertainties as to the assumed hydrogeological parameters and boundary conditions. They include shortcomings in the identification of hydrogeological conditions, cyclic changes of precipitation and evaporation, changes resulting from land management due to mining activity, changes in mining work schedules, and post-mining void flooding. Even though groundwater flow models used in mining hydrogeology have numerous limitations, they still provide the most comprehensive information concerning the mine dewatering and flooding processes and their influence on the environment. However, they will always require periodical verification based on new information on the actual response of the aquifer system to the mine drainage and the actual climate conditions, as well as up-to-date schedules of deposit extraction and mine closure.

scholarly journals Investigation of Groundwater Flow Using Δ18O and ΔD in a Sulfur Mine in Japan

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Shinji MATSUMOTO ◽  
Isao MACHIDA
Keyword(s):  
Groundwater Flow ◽  
Ground Water ◽  
Treatment Cost ◽  
Mine Drainage ◽  
Flow System ◽  
Treatment Plant ◽  
Underground Part ◽  
Groundwater Flow System ◽  
Δ18o And Δd ◽  
Iwate Prefecture

The A sulfur mine is located in the Iwate Prefecture of Japan. This mine has both surface and underground parts and was operatedfrom the late 1800s to the late 1900s. Since the early 1900s, acid mine drainage (AMD) has been reported in this mine, and the wastewater has been neutralized in a treatment plant since the mine was closed. Recently, reducing the AMD volume by decreasing waterinflow to the underground mine has been considered as a way to reduce the AMD treatment cost. The first step in such an approachis to understand in detail the groundwater flow around the mine. However, part of the study area is covered by lava and comprisescrystalline rocks with complicated structures, making it difficult to understand the groundwater flow. Therefore, the present studyinvestigated the groundwater flow around this mine by focusing on water quality, such as pH and electrical conductivity (EC), stableisotopes (i.e. δ18O and δD) and 3H in the surface and ground water. The spatial distributions of pH, Stiff diagrams, and δ18O and δDvalues in the surface and ground water indicated that the groundwater flow system was divided into three basins in the study area,as predicted from geomorphological information. Moreover, the spatial distribution of δ18O and δD in the surface and ground watersuggested that the groundwater recharged at the highest altitudes in the B mountain in the northwest of the mine might flow in theunderground mine. Furthermore, the 3H values in the waste water discharged from the underground part of mine implied that thegroundwater age was no more than approximately 60 years old.

scholarly journals Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 777
Author(s):  
Kohei Yamaguchi ◽  
Shingo Tomiyama ◽  
Toshifumi Igarashi ◽  
Saburo Yamagata ◽  
Masanori Ebato ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Groundwater Flow ◽  
Flow Rate ◽  
Mine Drainage ◽  
Three Dimensional ◽  
Abandoned Mines ◽  
Abandoned Mine ◽  
Underground Space ◽  
Groundwater Levels ◽  
Acid Mine

Three-dimensional groundwater flow around an abandoned mine was simulated to evaluate the effects of backfilling the excavated underground space of the mine on reducing the acid mine drainage (AMD). The conceptual model of the groundwater flow consists of not only variable geological formations but also vertical shafts, horizontal drifts, and the other excavated underground space. The steady-state groundwater flow in both days with high and little rainfall was calculated to calibrate the model. The calculated groundwater levels and flow rate of the AMD agreed with the measured ones by calibrating the hydraulic conductivity of the host rock, which was sensitive to groundwater flow in the mine. This validated model was applied to predict the flow rate of the AMD when backfilling the excavated underground space. The results showed that the flow rate of the AMD decreased by 5% to 30%. This indicates that backfilling the excavated space is one of the effective methods to reduce AMD of abandoned mines.

scholarly journals Remediation scenario of the abandoned Kettara mine site (Morocco): acid mine drainage (AMD) transport modeling

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Meriem Lghoul ◽  
Karim Sbihi ◽  
Abdelkabir Maqsoud ◽  
Rachid Hakkou ◽  
Azzouz Kchikach
Keyword(s):  
Acid Mine Drainage ◽  
Groundwater Flow ◽  
Groundwater Contamination ◽  
Flow Model ◽  
Mine Drainage ◽  
Groundwater Flow Model ◽  
Mine Site ◽  
Acid Mine ◽  
Kettara Mine Site ◽  
The Impact

AbstractIn this study, we present the efficiency of remediation scenario to attenuate the impact of acid mine drainage (AMD) contamination in the Kettara abandoned mine site. The study focuses on the AMD groundwater contamination of the Sarhlef shists aquifer. To predict the evolution of AMD groundwater contamination in the Kettara mine site under remediation scenario, a model of groundwater flow and AMD transport was performed.Piezometric heads were measured at the dry and wet periods from eleven wells located downstream of mine wastes. To elaborate a conceptual groundwater flow model, we faced with to the heterogeneity and anisotropy of fractured Sarhlef shists aquifer. Consequently, the study focused on the use of various approaches: 1. The inverse modeling by the CMA-ES algorithm is adopted as an alternative approach to determine hydraulic parameters indirectly, and 2. the model is treated as an equivalent porous media (EPM). The groundwater flow model was carried out in steady-state and transient conditions in the dry and wet periods using the PMWIN interface. The obtained results are satisfactory and show an excellent correlation between measured and computed heads. Contaminant transport model is used to solve the advection–dispersion equation and to generate the AMD concentration by MT3D via the PMWIN interface. A sensitivity analysis of the dispersivity coefficient is carried out. The AMD transport simulation was computed during periods of 1, 5 and 10 years, and the performed model indicates that the simulated concentrations under remediation scenario are reduced 1000 times comparing to the current concentrations. The study revealed a necessary approach in addressing an environmental issue for the AMD contamination. The results of the study will be a start-up for further research work in the study area and implementing it for the prevention of AMD propagation plume.

Mine Drainage

2009 ◽  
Author(s):  
Stephen Michell
Keyword(s):  
Mine Drainage
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