Hydrochemical evolution of groundwater in overburden …
Abstract. Hydrochemical evolution of groundwater can be related to and afected by mining activity, such as mine drainage. However, it is dificult to systematically and accurately …
Managed aquifer recharge in island aquifer under thermal influences …
1. Introduction. Island and coastal aquifers face a significant threat from seawater intrusion, that denser seawater can infiltrate the aquifers through subsurface movement (Robinson et al., 2018, Werner et al., 2013).The equilibrium naturally maintained between aquifers and seawater has been disrupted due to excessive groundwater …
Prevention of Water Inrushes in Deep Coal Mining over the …
Safe mining under water pressure refers to coal mining over confined aquifers. Since the first water inrush from the Ordovician limestone aquifer occurred in the Kaiping coalfield in 1920 [], different models for mining under water pressure and predicting water inrushes have been proposed [].To date, the development history of mining under …
Impact of Mining Activities on Groundwater Level
Mining directly disturbs the hydrological characteristics of groundwater systems, including long-term groundwater level declines (Qiao et al. 2011; Shi et al. …
Mining and Water Pollution
Mining can deplete surface and groundwater supplies. Groundwater withdrawals may damage or destroy streamside habitat many miles from the actual mine site. In Nevada, the driest state in the United States of America, the Humboldt River is being drained to benefit gold mining operations along the Carlin Trend.
Groundwater-Level Changes and Karst Collapses | SpringerLink
Figure 4.1 shows the typical sinkhole formation processes that are associated with groundwater-level decrease, as modified from Oosthuizen and Richardson ().Groundwater withdrawal includes groundwater extraction for drinking, industrial use, and irrigation, and dewatering in mines. Figures 4.2 through 4.5 show collapses that were …
Hydrochemical evolution of groundwater in overburden …
study, we reported the hydrochemical evolution of groundwater in the overburden aquifers (Jurassic Anding and Zhiluo aquifers) under the inuence of water drained from the underlying Yan'an aquifer, based on hydrochemistry and groundwater dynamics characteristics using self-organizing map (SOM) and time series analysis.
Simulation analysis of water resource damage feature and …
Main influencing factors to aquifer during coal mining. Under the action of mining, the water resource in aquifer will be changed. This is mainly due to that the …
Failure Mechanism and Movement Characteristics of …
DOI: 10.1007/s00603-024-03929-z Corpus ID: 269702041; Failure Mechanism and Movement Characteristics of Overlying Strata in Longwall Mining Face with Thick Aquifer @article{Wang2024FailureMA, title={Failure Mechanism and Movement Characteristics of Overlying Strata in Longwall Mining Face with Thick Aquifer}, author={Yuliang Wang …
The potential threat of mine drainage to groundwater …
Carbonate aquifers hold substantial groundwater resources in many areas. In Europe, for example, water resources hosted in carbonate rocks satisfy ∼50% of …
WORKPLAN GUIDANCE DOCUMENT FOR MINING …
blast damage at the bottom of the proposed quarry pit. Furthermore, depending on ... it may be necessary to extend wells below the bottom of the quarry pit. The mining operator and the operator's ... proposed new pit or pit expansion may affect this zone of influence. When proposing an aquifer pumping test, describe in detail the methodology ...
The Influence of Mining Under Loose Aquifer on Bearing Damage …
Using the experimental method of the numerical simulation,the influence of loose aquifer on overburden failure laws is studied.The results show that the overburden failure can be divided into tensile deformation zone,the tensile rupture and shear deformation zone and deformation zone.In the process of load transfer of loose aquifer,the load in the top of …
Contamination of water resources in the mining region
The heavy metal concentration was observed high in soil surrounding the mining area, and under the influence of intense precipitation heavy metals leach into groundwater. The fractures and fissions present in parent rocks also play a significant role in the permeability and contamination of groundwater in the downstream of mines ( …
Companies Mining in Aquifer Face New Regulations as …
Companies applying for mining permits in the aquifer after August 1 st of last year will have to report how much water they're removing and submit a plan to recycle it.
Study on the damage evolution and water loss of aquifer under coal mining
Zhao, C. H., et al., Construction and Application of Overburden Damage and Aquifer Water Loss Model in Medium-deep Buried Coal Seam Mining in Yushen Mining Area, Journal of China Coal Society, 44 ...
Importance of Radius of Influence and its Estimation in a Limestone Quarry
Limestone mining at Lanjiberna limestone and dolomite quarry has created positive as well negative impacts on ground water. With further deepening of the mine, drawdown trend (negative effect) is ...
Study of the mining and aquifer interactions in complex …
This paper examined this phenomenon in a complex strata condition via a case study, and proposed a new mining design to minimize the impact of longwall mining on the overlaying aquifer.
Seawater intrusion in the coastal aquifers of India
Coastal aquifers are highly sensitive to both regional and global phenomena that include sea-level rise, storm surges, change in climatic condition, shoreline erosion, coastal flooding, etc. (Barlow, 2003).Additionally, human activities are enhancing the salinization process in coastal regions (Rapti-Caputo, 2010).Apart from the coastal …
Study of the mining and aquifer interactions in complex …
The interaction of mining and the surface water or aquifer system in varying overburden strata conditions is one of the most critical aspects of sustainable mining …
Hydrochemical Characteristics and Evolution under the …
tural, and mining. Each of these areas exhibits unique characteristics that influence karst groundwater conditions. Industrial waste, domestic effluent, agricultural irrigation, and mining water drainage have all contributed to widespread shallow groundwater pollution, posing a significant threat to the quality of deep karst …
8.15: Groundwater Aquifers
Aquifer. An underground layer of rock that is saturated with groundwater is called an aquifer. A diagram of an aquifer is pictured below (Figure below). Aquifers are generally found in porous rock, such as sandstone. Water infiltrates the aquifer from the surface. The water that enters the aquifer is called recharge.
Hydrogeochemical evolution induced by long-term mining …
In this study, the hydrogeochemical evolution mechanism of groundwater in a multi-aquifer system in the Fengfeng Mining Area was investigated using machine …
(PDF) Marble Slurry's Impact on Groundwater: The Case …
Slurry produced by limestone and marble quarrying can impact local karst aquifers, negatively affecting the groundwater quality and generating a remarkable environmental …
The influence of geology on blast damage
The results suggest that the quality of the rock in which an excavation is situated has an influence on the level of ground vibration to which it can be subjected without sustaining damage.
MINING ENTERPRISES & GROUNDWATER
influence on mining operations and mine safety, and mitigating such problems ... potential loss of life, damage to capital equipment and mining continuity with ... underlying regional aquifers where uranium mining practices in-situ leaching with strongly acidic or alkaline solutions – for example in the
Influence of the dominant fracture and slurry viscosity on …
Influence of the dominant fracture and slurry viscosity on the slurry diffusion law in fractured aquifers ... The prototype of the fractured aquifer studied in this paper is the L 8 limestone aquifer in the Jiaozuo mining area. Various similarity ratio calculation formulas and calculation results are shown in the following table ...
Aquifers and Groundwater | U.S. Geological Survey
After entering an aquifer, water moves slowly toward lower lying places and eventually is discharged from the aquifer from springs, seeps into streams, or is withdrawn from the ground by wells. Groundwater in aquifers between layers of poorly permeable rock, such as clay or shale, may be confined under pressure.
Reutilization of gangue wastes in underground backfilling mining …
The mining disturbance of working face in deep coal mine leads to the fracture and movement of overlying strata and the damage of the aquifer in overlying strata, thereby causing water inrush ...
Contamination of Groundwater | U.S. Geological Survey
Often used in electrical industry equipment and components, nuclear power and space industry. Enters the environment from mining operations, processing plants, and improper waste disposal. Found in low concentrations in rocks, coal, and petroleum and enters the ground and: Causes acute and chronic toxicity; can cause damage to lungs …
Study of the mining and aquifer interactions in complex …
The interaction of mining and the surface water or aquifer system in varying overburden strata conditions is one of the most critical aspects of sustainable mining practices, that …
(PDF) Engineering and enviro-management value of radius of influence
The variation in radius of influence under confined and unconfined aquifer condition is assessed using a hypothetical case study with three operational quarry sites.
Hydrogeochemical evolution induced by long-term mining …
The hydrogeochemical characteristics of different aquifers in the mining area changed to different degrees after mining compared with the characteristics before mining. ... elucidate the hydrogeochemical evolution mechanism under the influence of long-term mining activities. This is a step forward in the knowledge of regional multi-aquifer ...
(PDF) Marble Slurry's Impact on Groundwater: The Case …
Slurry produced by limestone and marble quarrying can impact local karst aquifers, negatively affecting the groundwater quality and generating a remarkable environmental and economic damage. A very representative case-study is that of the Apuan Alps (north-western Tuscany, Italy) because of the intensive marble quarrying activity.
Water-Filling Characteristics and Water Source of Weakly …
The escalation of mining activities in the karst regions of Guizhou Province has heightened the occurrence of water-inrush incidents in deep coal mines. This study focused on water-inrush phenomena within the Xinhua mining area of Jinsha County, Guizhou Province, aiming to investigate the sources of these incidents. The findings …
OSMRE Reviews and Analyzes Navajo Aquifer Material Damage …
OSMRE's review and analysis of available information contained in PWCC and USGS reports from 2016 to 2021 indicates that material damage has not occurred to the hydrologic balance of the N-aquifer outside of the PWCC Black Mesa Kayenta Complex lease area as a result of mining and reclamation.