Flow and geochemical modeling of drainage from Tomitaka mine, Miyazaki, Japan

Yamaguchi, Kazuya; Tomiyama, Shingo; Metugi, Hideya; Hiroyuki,; Ueda, Akira

doi:10.1016/j.jes.2015.05.012

Cited by 13 publications

(6 citation statements)

References 23 publications

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“…After measuring OCP under N 2 atmosphere, a fixed potential of 0.7 V vs. SHE was applied to the working electrode for 1 h with magnetic stirring at 250 rpm. This applied potential was chosen based on typical redox conditions where AMD has been formed (i.e., about 0.64-0.68 V) (Yamaguchi et al, 2015).…”

Section: Chronoamperometry Measurementsmentioning

confidence: 99%

Suppression of arsenopyrite oxidation by microencapsulation using ferric-catecholate complexes and phosphate

et al. 2021

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Section: Chronoamperometry Measurementsmentioning

confidence: 99%

Suppression of arsenopyrite oxidation by microencapsulation using ferric-catecholate complexes and phosphate

et al. 2021

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“…Groundwater flows through aquifers consisting of surface soil and weathered layers at this mine site. Groundwater in the aquifers flows to mining areas through faults and veins as shown in Figure 2 [42]. Groundwater in the mined area flows through the mining levels (−2 L, −3 L, and −5 L) to the adit mouth of the drainage level (−5 L).…”

Section: Conceptual Model Of Groundwater Flowmentioning

confidence: 99%

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

et al. 2020

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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.

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“…Rainwater flowing into the mines is then collected in a sump, and reused for spraying onto haul roads, conveyors and loading and unloading [23]. Excess water discharge is flowed to the surface using a drainage system.…”

Section: Parameters Of Mine Drainage Systemmentioning

confidence: 99%

Design of coal mine drainage system

2019

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Research from coal fields show that increased production from coal mines resulted in a wider pit. Changes in the water catchment area resulted in changes in the calculation of mine water volume. Excessive mine water volume affects mining activities. Large amounts of water in the pit causes disruption in excavation and loading and hauling activities. Therefore, the design of mine drainage systems is required. The purpose of the study is to analyse statistically the parameters of the mine drainage system, and to design the mine drainage system; including open drain, sump, and settling pond. The research tools used include the calculation of runoff water discharge that requires statistical analysis for rainfall data processing and the determination of catchment area (CA). The open channel dimension and settling pond design is based on the sump volume calculation. The research area has high rainfall clased for the particle to settle is 30.38 minutes. The percsification, solid percent 2.66 % with settling rate 0.0027 m/s; the time requirentage of theoretically suctioned particle is 83 %, and the settling pond maintenance time that has 4 compartments is 15, 16, 19, and 23 days.

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Flow and geochemical modeling of drainage from Tomitaka mine, Miyazaki, Japan

Cited by 13 publications

References 23 publications

Suppression of arsenopyrite oxidation by microencapsulation using ferric-catecholate complexes and phosphate

Suppression of arsenopyrite oxidation by microencapsulation using ferric-catecholate complexes and phosphate

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

Design of coal mine drainage system

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