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Safety Estimation Of Groundwater Inflow In A Quarry :

safety estimation of groundwater inflow in a quarry

safety estimation of groundwater inflow in a quarry JOURNAL OF ENVIRONMENTAL HYDROLOGY - hydroweb The results of the analytical groundwater modelling indicate that the Penrice Quarry will become a groundwater sink post mining with water levels never recovering to the pre-mining level, due to evaporation effects assumed to be greater than ...

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Safety Estimation Of Groundwater Inflow In A Quarry

Safety Estimation Of Groundwater Inflow In A Quarry. Groundwater Seepage Services - environmental-expert. ERD has investigated and developed innovative methods for estimation of groundwater flux in surface water systems.

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EXAMPLE CALCULATIONS OF POSSIBLE GROUND

2010-12-3  of ground-water inflow from the reservoir to the mine pits. The purpose of this study, conducted in cooperation with the U.S. Bureau of Reclamation, was to provide example calculations of how ground-water inflow could be estimated. Darcy's law was used to calculate one-dimensional inflow from the reservoir to the mine pits.

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Assessment of groundwater inflows into Kuteshwar

2011-10-14  The computed inflow to the quarry indicates that a maximum inflow of 32,540 m 3 /day would be expected to the Marwa quarry at floor level of 283 m (amsl). The inflow to the Marwa quarry at quarry floor level under full exposure condition has been computed in the groundwater flow model under second scenario.

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Hydrogeological and groundwater modeling studies to ...

2014-9-1  The groundwater inflow into the quarry is mainly dependent on quarry floor level and surrounding groundwater level. The calibrated numerical model against the measured potentiometric surface under the assumed steady-state conditions predicted that the proposed open cast mine (SRPOCP-II) would require a groundwater pumping of 5877 m day −1 in ...

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Determination Of Groundwater Flow Direction In Ekintae ...

2016-5-25  ground water flow direction in 3 - D The elevation map was also modeled in 3D with the help of Arc GIS suffer 10 computer software (Fig. 4b). The result from the static water level, hydraulic head maps, and the elevation maps reveal that the ground water flow direction in Ekintae East (proposed quarry phase II) and its environ is toward the

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Estimation of Solute Transport and Storage Parameters

2003-9-30  A major limestone quarry operation in the watershed, though recently decommissioned, continues to pump accumulated groundwater out of the quarry pit and into a tributary of Valley Creek, as shown in Figure 1. During the period of the study, the quarry pumps operated in a cycle of (1) one pump operating, (2) two pumps operating, and (3) no pumping.

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Modelling Groundwater Inflow to a Mine Pit: A Monte

2017-8-17  Kışladağ, Turkey by modelling the groundwater inflow to the open pit together with the precipitation, surface runoff and evaporation. Modelling methodology is based on a systems modelling approach. Results reveal the validity of the proposed system dynamics model for estimation of groundwater inflow to the mine pit.

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Dewatering Characteristics and Inflow Prediction of Deep ...

2019-10-19  the coast [8,9]. Thus, the excavation surface is commonly below the groundwater surface in such areas. For excavation stability, a dry construction environment is necessary, so groundwater control measures are supposed to be adopted during construction. However, the stratigraphic distribution of

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Prediction of Groundwater Inflow into an Iron Mine: A

2019-3-7  Groundwater inflow to the mine was computed as the difference between the total water pumped from the pit minus the total precipitation flow to the pit (Table 2). The average groundwater flow into the mine from June 2008 to July 2009 was calculated to be 267,300 m 3 /month (8900 m 3 /day).

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Orgreave, Alrewas: Dewatering Assessment

Groundwater Inflow Total groundwater inflow to the quarry voids during dewatering has been estimated using the Dupuit-Theim equation (Equation 2) for steady-state flow to a well in an unconfined aquifer (Kruseman de Ridder, 1990). = 𝜋∙𝑘∙(ℎ1 2− ℎ 2 2 2.3∙log(𝑟𝑒 + 𝑅0 𝑟𝑒)) (2)

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Mathematical modelling for estimation of minewater

This approach provides a simple method of predicting first order estimates of groundwater inflow to mining excavations and provides a factor of safety by slightly over-estimating the inflow. INTRODUCTION The prediction of water inflows into a surface mine excavation is one of the many components involved in mine design phase.

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Modelling Groundwater Inflow to a Mine Pit: A Monte

2017-8-17  Kışladağ, Turkey by modelling the groundwater inflow to the open pit together with the precipitation, surface runoff and evaporation. Modelling methodology is based on a systems modelling approach. Results reveal the validity of the proposed system dynamics model for estimation of groundwater inflow to the mine pit.

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PREDICTION OF GROUNDWATER INFLOW AND HEIGHT

of groundwater inflow into a deep open pit. This model is capable to consider the saturated/unsaturated flow, confined/unconfined aquifer, and can determine the height of the seepage face at pit ...

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Forecasting and prevention of water inrush during the ...

Introduction: Estimating groundwater inflow into a tunnel before and during the excavation process is an important task to ensure the safety and schedule during the underground construction process. Case description: Here we report a case of the forecasting and prevention of water inrush at the Jinping II Hydropower Station diversion tunnel groups during the excavation process.

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Estimation of groundwater inflow to irrigation drains in ...

2009-12-24  Estimation of groundwater inflow to irrigation drains in Minia, Upper Egypt, based on a deuterium and oxygen-18 evaporation pan technique Estimation de l'apport d'eaux souterraines aux drains d'irrigation à Minia (Haute Egypte), utilisant le deuterium et l'oxygène-18

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Water flow in fractured rock masses: numerical modeling ...

Water circulation in rocks represents a very important element to solve many problems linked with civil, environmental and mining engineering. In particular, the interaction of tunnelling with groundwater has become a very relevant problem not only due to the need to safeguard water resources from impoverishment and from the pollution risk, but also to guarantee the safety of workers and to ...

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Structural controls on groundwater inflow analysis of ...

2021-2-26  The exact estimation of water inflow into tunnels is still a challenge for many due to various factors such as the rock mass permeability and environmental conditions (Palmström 2009). Geological structures such as fault and open fractures are predominantly the path for groundwater inflow in low matrix permeability or hard rock formation.

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INDEPENDENT PEER REVIEW OF SANCROX QUARRY

The modelling objectives are to evaluate groundwater inflow rates into the expanded quarry as well as potential groundwater drawdown proximal to the quarry and the potential magnitude of drawdown at identified groundwater users. The modelling objectives were stated in specific and measurable terms, along with the resource

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Improving precision in regional scale numerical ...

2020-9-5  The simulation results shown in Fig. 1c confirm that the inflow to a line segment is a logarithmic function of the grid size and the equivalent radius of the tunnel is about 20% of the grid size. Assuming that inflow needs to be estimated using a numerical model of coarse mesh at the regional scale without explicitly discretizing the tunnel geometry as in many practical modeling exercise ...

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Best Management Practices for Quarry Operations

2011-11-28  Best Management Practices for Quarry Operations TCEQ publication RG-500 2 January 2012 2 General Guidelines 2.1 Separation from Groundwater in the Recharge Zone To prevent pollution of groundwater in the Edwards Aquifer, the TCEQ recommends a minimum separation of 25 feet between the quarry-pit floor and the groundwater level for quarries in the

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"Estimating groundwater inflow and age characteristics in ...

We synoptically sampled a 2 km gaining reach of the Little Wind River in central Wyoming for 222Rn, CFCs and SF6 to determine the distributed volumes and locations of discharge and estimate alluvial groundwater age characteristics. 222Rn was sampled in the stream, shallow in-stream piezometers and nearby alluvial groundwater wells to determine the volume and spatial distribution of groundwater ...

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MECON: Exploration Geologists, Hydrogeologists ...

2013-3-1  Investigation and Estimation of Groundwater and Surface water inflow to the quarry, United Cement Company of Nigeria Ltd., Mfamosing, Cross River State. July, 2012 Geological Mapping and Exploratory Core drilling of a part of Kogi for marble deposits, Lafarge Cement, Oct., 2011

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Forecasting and prevention of water inrush during the ...

Introduction: Estimating groundwater inflow into a tunnel before and during the excavation process is an important task to ensure the safety and schedule during the underground construction process. Case description: Here we report a case of the forecasting and prevention of water inrush at the Jinping II Hydropower Station diversion tunnel groups during the excavation process.

More

Water Control in Underground Mines – Grouting or

2012-2-19  for overcoming sections with poor ground conditions or excessive ground water inflow. Mine dewatering is the most common method of water control in underground mines. Dewatering methods for underground mines can range from the relatively simple collection of

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FINAL REPORT Scotian Materials Limited Goffs Quarry

2019-9-5  Prior to evaluating the effects of the Project, groundwater modelling was completed to estimate the groundwater seepage and radius of influence (ROI). Using the Simple analytical equations for estimating ground water inflow to a mine pit (Marinelli and Niccoli 2000) the groundwater seepage and radius of influence were calculated.

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INDEPENDENT PEER REVIEW OF SANCROX QUARRY

The modelling objectives are to evaluate groundwater inflow rates into the expanded quarry as well as potential groundwater drawdown proximal to the quarry and the potential magnitude of drawdown at identified groundwater users. The modelling objectives were stated in specific and measurable terms, along with the resource

More

Improving precision in regional scale numerical ...

2020-9-5  The simulation results shown in Fig. 1c confirm that the inflow to a line segment is a logarithmic function of the grid size and the equivalent radius of the tunnel is about 20% of the grid size. Assuming that inflow needs to be estimated using a numerical model of coarse mesh at the regional scale without explicitly discretizing the tunnel geometry as in many practical modeling exercise ...

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Water Inflow Scientific.Net

Abstract: This paper focused on five kinds of methods for water inflow of typical sections in a long deep buried tunnel under conditions of high ground stress and high water pressure (referred to as “two high conditions”). The methods are based on groundwater dynamics formulae and practical experience. Results show that calculation data by ...

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(PDF) Engineering and enviro-management value of radius

With further deepening of the mine and quarry, the drawdown can impact on water supply wells and base flow. The variation in radius of (PDF) Engineering and enviro-management value of radius of influence estimate from mining excavation Dr. Yohannes Yihdego Woldeyohannes - Academia

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