Assessment of Unsaturated Flow for a Large Coal Mine Waste Rock Pile

2014 ◽  
Vol 955-959 ◽  
pp. 1179-1183 ◽  
Author(s):  
Hajizadeh Namaghi Hadi ◽  
Ming Kun Luo ◽  
Sheng Li
Keyword(s):  
Unsaturated Flow ◽  
Mine Drainage ◽  
Mine Waste ◽  
Waste Rock ◽  
Coal Waste ◽  
Rock Pile ◽  
Rock Materials ◽  
Solute Transport Modeling ◽  
Waste Rock Pile ◽  
Waste Rock Piles

Some waste rock piles create some problems such as acid mine drainage (AMD), leaching of heavy metals, and slope stability concerns. These problems are related to the flow of water through the rock pile. Understanding the physical and hydrological properties of the waste rock piles is important for flow and solute transport modeling. To study physical properties and unsaturated flow in rock pile, some soil samples were collected from surface of the large coal waste rock pile and tested for some common geotechnical parameters in the laboratory. The results showed that materials are so heterogeneous and highly supporting segregation and natural gravity sorting of waste rock materials from top to toe. Numerical simulation was performed to investigate the unsaturated flow conditions in the pile. The results obtained showed that pile is unable to fully saturate and drain during the simulated period. It was also found that high evaporation and also coarse grain nature of waste rock materials results holding few amounts of water in the system.

Numerical Simulation of Water Flow in Mine Waste Rock Pile

2015 ◽  
Vol 744-746 ◽  
pp. 1101-1108
Author(s):  
Meng Zhou Zhang ◽  
Zeng He Xu ◽  
Li Guo Jiang
Keyword(s):  
Unsaturated Flow ◽  
Water Movement ◽  
Mine Waste ◽  
Waste Rock ◽  
Rock Pile ◽  
Fine Material ◽  
Internal Structures ◽  
Waste Rock Pile ◽  
Mine Waste Rock

As a long-term source of contaminant solutes, the flow of water within a waste rock pile containing reactive sulfide minerals significantly contributes to the solutes transportation. In this paper, a waste rock pile with the internal structures and grain size distribution from a typical waste dump is introduced as the geometric configuration. A numerical model is then applied to simulate unsaturated flow within a waste rock pile constructed with two primary materials. The simulations results show that the water movement within heterogeneous pile mainly depended on the internal structures. The flow of water can be controlled by the fine material layers within the coarse materials. These fine material layers form a capillary barrier which preventing the water infiltrate towards the centre of the pile. They can retain more water than coarse materials and form a ponding effect and/or percolation points within the pile.

Combined DC resistivity and induced polarization (DC-IP) for mapping the internal composition of a mine waste rock pile in Nova Scotia, Canada

2018 ◽  
Vol 150 ◽  
pp. 40-51 ◽  
Author(s):  
Christopher Power ◽  
Panagiotis Tsourlos ◽  
Murugan Ramasamy ◽  
Aristeidis Nivorlis ◽  
Martin Mkandawire
Keyword(s):  
Nova Scotia ◽  
Mine Waste ◽  
Induced Polarization ◽  
Waste Rock ◽  
Dc Resistivity ◽  
Rock Pile ◽  
Waste Rock Pile ◽  
Mine Waste Rock

NUMERICAL SIMULATIONS OF LONG TERM UNSATURATED FLOW AND ACID MINE DRAINAGE AT WASTE ROCK PILES

2006 ◽  
Vol 2006 (2) ◽  
pp. 582-597 ◽  
Author(s):  
Omar Fala ◽  
John Molson ◽  
Michel Aubertin ◽  
Bruno Bussière ◽  
Robert P. Chapuis
Keyword(s):  
Acid Mine Drainage ◽  
Numerical Simulations ◽  
Unsaturated Flow ◽  
Mine Drainage ◽  
Waste Rock ◽  
Acid Mine ◽  
Waste Rock Piles

Close-Out of the Daxin Open Pit Uranium Mine and Associated Waste Rock Piles in China

2013 ◽  
Author(s):  
Lechang Xu ◽  
Jie Gao ◽  
Changshun Ren ◽  
Min Shi ◽  
Xueli Zhang
Keyword(s):  
Wastewater Treatment ◽  
Open Pit Mine ◽  
Waste Rock ◽  
Open Pit ◽  
Uranium Mine ◽  
Slope Stabilization ◽  
Rock Pile ◽  
Waste Rock Pile ◽  
Transfer Station ◽  
Waste Rock Piles

The Daxin Uranium Mine was a small open pit mine with contaminated facilities that included an open pit of 87,620 m2, east waste rock pile of 71,710 m2, west waste rock pile of 57,828 m2, ore transfer station and industrial fields of 9,370 m2, building and structures of 26,600 m2, 246 pieces of equipment, 3000 m of plastic conduit. 2500 m of steel conduit and 1020 m of roads used for transport uranium ores. We present the integrated decommissioning programme utilized to closeout this uranium mine: uranium extraction, slope stabilization, cleanup, backfill, reshaping and covering, re-vegetation, dismantlement and demolishment of facilities, decontamination, re-smelting and wastewater treatment.

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