Expansive behavior of coal mine spoils treated with calcium-based stabilizers

2014 ◽  
Vol 175 ◽  
pp. 46-57 ◽  
Author(s):  
Sochan Jung ◽  
Marika Santagata
Keyword(s):  
Coal Mine ◽  
Mine Spoils

Effects of initial fertilizer treatment on the 10-year growth of mixed woodland on compacted surface-coal-mine spoils, S. Wales

2018 ◽  
Vol 29 (10) ◽  
pp. 3456-3468 ◽  
Author(s):  
Martin John Haigh ◽  
Heather Reed ◽  
Margaret D'Aucourt ◽  
Alison Flege ◽  
Mike Cullis ◽  
...  
Keyword(s):  
Coal Mine ◽  
Fertilizer Treatment ◽  
Mine Spoils ◽  
Surface Coal Mine

EFFECT OF LEONARDITE ON DIFFUSION OF PHOSPHORUS IN COAL MINE SPOILS

Soil Science ◽  
1977 ◽  
Vol 124 (5) ◽  
pp. 285-290 ◽  
Author(s):  
J. W. HARRELL ◽  
M. SAEED
Keyword(s):  
Coal Mine ◽  
Mine Spoils

Technogenic Soils From Coal Mine Spoils

1998 ◽  
pp. 157-206
Author(s):  
S. Kiss ◽  
D. Paşca ◽  
M. Drăgan-Bularda
Keyword(s):  
Coal Mine ◽  
Mine Spoils ◽  
Technogenic Soils

Controls of Wetting and Drying Cycles on Salt Leaching from Coal Mine Spoils

2021 ◽  
Vol 232 (11) ◽  
Author(s):  
Karan Rishabhkumar Jain ◽  
Mansour Edraki ◽  
Neil McIntyre
Keyword(s):  
Coal Mine ◽  
Wetting And Drying ◽  
Mine Spoils ◽  
Wetting And Drying Cycles ◽  
Salt Leaching

Prediction of salt release from coal mine spoils at meso-scale

2021 ◽  
Author(s):  
Karan Rishabhkumar Jain ◽  
Mansour Edraki ◽  
Neil McIntyre
Keyword(s):  
Coal Mine ◽  
Preferential Flow ◽  
Sample Volume ◽  
Transport Processes ◽  
Atmospheric Conditions ◽  
Mining Operations ◽  
Mine Spoils ◽  
Preferential Flow Paths ◽  
Overburden Material ◽  
Mine Sites

<p>Open-cut coal mining operations remove enormous quantities of overburden material inorder to access coal seam. Upon interaction with atmospheric conditions, this overburden material referred to as spoils from which salts are leached, possesses the risk of affecting surface and groundwater quality around the mine sites. Due to a distinct lack of field data on leachate rates and chemistry for full-scale spoil piles, studies have relied on geochemical testing at laboratory-scale experiments such as free-draining funnels and columns. While laboratory leaching techniques under a controlled environment are a general predictor of how spoil behaves upon weathering, there remain gaps in understanding the leachate rates taking into consideration actual particle size, flow rates, water content, temperature, and oxygen supply. This study proposes and assesses a new mesoscale approach for predicting salinity release from spoils that is designed to obtain data more relevant to the closure options under consideration. 5 coal mine spoils from 3 mines located in Queensland, Australia was sampled, characterised (physical, geochemical, and mineralogical), and were subjected to weathering at mesoscale (1-2 tonnes sample volume) leaching for 11 cycles under natural conditions. Results showed that soil-like spoils with significant pockets of less permeable clayey or silty material have the ability to retain and release solute slowly with time while rock-like spoils followed a steady decay rate. The mesoscale tests produced distinctive characteristic decay curves of salt release from typical soil-like and rock-like spoils and have been useful in the calibration of flow and moisture-dependent salt kinetic parameters. The mesocosm leaching approach developed as a part of this study was close to real-sized spoil conditions such that it mimicked the water/rock ratios, preferential flow paths, and governing solute transport processes.</p>

scholarly journals The Effect of Weathering on Salt Release from Coal Mine Spoils

Minerals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 760
Author(s):  
Melinda Hilton ◽  
Mandana Shaygan ◽  
Neil McIntyre ◽  
Thomas Baumgartl ◽  
Mansour Edraki
Keyword(s):  
Particle Size ◽  
Coal Mine ◽  
Chemical Weathering ◽  
Physical Weathering ◽  
Particle Size Fractions ◽  
Mine Spoils ◽  
Weathering Processes ◽  
Three Samples ◽  
Two Samples ◽  
Physical And Chemical

Coal mine spoils have the potential to create environmental impacts, such as salt load to surrounding environments, particularly when exposed to weathering processes. This study was conducted to understand the effect of physical and chemical weathering on the magnitude, rate, and dynamics of salt release from different coal mine spoils. Five spoil samples from three mines in Queensland were sieved to three different particle size fractions (<2 mm, 2–6 mm, and >6 mm). Two samples were dispersive spoils, and three samples were nondispersive spoils. The spoils were subjected to seven wet–dry cycles, where the samples were periodically leached with deionised water. The rate, magnitude, and dynamics of solutes released from spoils were spoil specific. One set of spoils did not show any evidence of weathering, but initially had higher accumulation of salts. In contrast, broad oxidative weathering occurred in another set of spoils; this led to acid generation and resulted in physical weathering, promoting adsorption–desorption and dissolution and, thus, a greater release of salts. This study indicated that the rate and magnitude of salt release decreased with increasing particle size. Nevertheless, when the spoil is dispersive, the degree of weathering manages salt release irrespective of initial particle size. This study revealed that the long-term salt release from spoils is not only governed by geochemistry, weathering degree, and particle size but also controlled by the water/rock ratio and hydrological conditions of spoils.

The effects of replaced topsoil of different depths on the vegetation and soil properties of reclaimed coal mine spoils in an alpine mining area

2019 ◽  
Vol 65 (3-4) ◽  
pp. 92-105
Author(s):  
Xinguang Yang ◽  
Xilai Li ◽  
Mingming Shi ◽  
Liqun Jin ◽  
Huafang Sun
Keyword(s):  
Plant Growth ◽  
Soil Properties ◽  
Coal Mine ◽  
Growth Parameters ◽  
Soil Depth ◽  
Mining Area ◽  
Vegetation Coverage ◽  
Mine Spoils ◽  
Plant Soil ◽  
Different Depths

Replacement of topsoil to an appropriate depth is one of the key methods for ecological restoration. The objective of this study was to investigate the effects of topsoil replacement depth on vegetation and soil properties, and to identify the optimum soil depth for reclamation of coal mine spoils in a cold alpine mining area. We sowed 3 herbaceous species after coal mine spoil heaps were treated with topsoil to 3 depths (0, 20‒25, 40‒45 cm). The variations in vegetation community structure, plant growth, soil properties were measured at different replaced topsoil depths. The correlations between plant and soil properties were analyzed statistically. The results showed species richness, diversity and evenness were not significantly different among different depths of topsoil (P > 0.05). Vegetation coverage, density, height and aboveground biomass increased significantly (P < 0.05) with increasing topsoil depth. Soil properties did not change significantly with increasing topsoil depth (P > 0.05), but soil organic matter was significantly higher at 40‒45 cm topsoil depth than at other two depths (P < 0.05). All soil properties, with the exception of total potassium, were positively correlated with the plant growth parameters. The 40‒45 cm topsoil depth of replacement should be considered as effective method in reclaiming coal mine spoils. The use of both topsoil replacement to a depth of 40‒45 cm and sowing of suitable herbaceous seeds is found to be an effective restoration strategy. Additionally, fertilization might be used as a substitute for artificial topsoil replacement to improve soil quality and speed up revegetation process by the positive plant-soil interactions.

A column evaluation of Appalachian coal mine spoils' temporal leaching behavior

2015 ◽  
Vol 204 ◽  
pp. 39-47 ◽  
Author(s):  
Zenah W. Orndorff ◽  
W. Lee Daniels ◽  
Carl E. Zipper ◽  
Matt Eick ◽  
Mike Beck
Keyword(s):  
Coal Mine ◽  
Leaching Behavior ◽  
Mine Spoils
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