Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"mine spoil"”.
-
Hydrologic and hydrochemical processes on mine spoil fills
… coal mining operations fracture rocks (termed mine spoils), resulting in the weathering of minerals and release of water-soluble ions to streams. Collectively, the concentration of water-soluble ions in streams is called total dissolved solids (TDS) and streams with elevated TDS often have …
-
Spatial variation of AMD related CO₂ emissions on reclaimed mine spoil
<p>"Carbon dioxide (CO₂) from acid mine drainage (AMD)-carbonate neutralization reactions in reclaimed mine spoils, can intermittently invade homes and structures constructed on or adjacent to these spoils in hazardous and even lethal concentrations (>15%) and rendering them uninhabitable. This …
-
Restoration of nitrogen and carbon cycling in an Appalachian mine spoil
… terrestrial ecosystems are largely lacking in mine soils. Reliable guidelines for effective long-term restoration require a detailed understanding of the ecological processes occurring within the mine-soil system. The objective of this study was to determine the extent to which inorganic N …
-
Influence of Pisolithus tinctorius and mine spoil on the growth of Virginia pine seedlings
… consisting of peat:vermiculite amended by mine spoil. Significantly better seedling growth and ectomycorrhizal development occurred when substrates were inoculated three weeks before or at seeding, rather than three weeks after seeding or not at all. Low levels of mine spoil substrate …
-
Quantification of acid loads and delineation of hydrochemical facies at a phreatic mine spoil aquifer
Acid mine drainage geochemistry and in situ alkaline injection were investigated at the DLM coal mine, Alton West Virginia. These included spatial and temporal investigations into hydrochemical controls that were initiated with reclamation efforts. Approaches included the delineation of …
-
Physical, chemical and mineralogical properties of mine spoil derived from the Wise Formation, Buchanan County, Virginia
… weakened rocks in 6 months or less. The silty spoils cause excessive dust, are crusted and support ponds. Application of organic amendments promotes infiltration. Some of the spoils contain enough salts to seriously retard growth of non-tolerant plant species. Exchangeable bases are …
-
Effect of Various Saturation Levels, Leaching Solution pH, and Leaching Cycle on Electrical Conductivity from Coal Mine Spoil Leachate
… associated with Appalachian coal surface mines focused on acid mine drainage and reclamation. Recent studies suggest that electrical conductivity (EC) levels above 500 ?S cm-1 can impair Appalachian streams, shifting the focus towards limiting release of total dissolved solids (TDS) and …
-
The Effects of Nitrogen and Phosphorus Fertilizer on a Young Loblolly Pine Plantation on Lignite Mine Spoil in East Texas
… year-old loblolly pine plantation on a lignite mine spoil in East Texas. Growth parameters, foliar and spoil nitrogen and phosphorus concentrations were measured after two growing seasons. Nitrogen increased diameter growth during the first year, and foliar nitrogen increased with increasing …
-
A finite element analysis of dissolved oxygen drawdown and sulfate production in strip mine spoil dams due to pyritic chemical reaction
… oxygen drawdown and sulfate production in strip mine spoil dams due to chemical reaction between an excess of pyrite, water, and dissolved oxygen is investigated. A finite element analysis is used to solve the diffusion-convection equation assuming steady state conditions and no internal oxygen …
-
Effect of Leaching Scale on Prediction of Total Dissolved Solids Release from Coal Mine Spoils and Refuse
… scale leaching vessels (scales) using one coal mine spoil and two coarse coal refuse materials. A non-acidic mine spoil sample from SW Virginia (crushed to ≤ 1.25 cm) was placed into PVC columns (~10 cm x 40 cm) in the laboratory and leached unsaturated with simulated acidic rainfall. The same …
-
Managing symbiotically-fixed nitrogen on mined land for tree crops
Young mine soils constructed following surface-mining for coal contain low levels of organic matter and nitrogen. It was hypothesized that nitrogen-fixing plants could be incorporated into a reforestation system in a manner that would meet the short term and long-term nitrogen needs of crop trees …
-
Evaluation of the universal soil loss equation on a selected reclaimed eastern surface mine area
… on a "Mountain Top Removal" type of surface mine near Beckley, West Virginia to evaluate the the predictability of the Universal Soil Loss Equation for a selected eastern surface mine spoil. Comparison of predicted and measured soil losses indicated significant error. For slopes greater than …
-
Evaluation of Topsoil Substitutes for Restoration of Appalachian Hardwoods on Strip Mined Land
Current surface mine reclamation in Appalachia involves returning the land to approximate original contour by grading the surface and planting grasses and early-successional trees. This results in a greatly altered ecosystem compared to the native forest that was there prior to mining. The …
-
Use of Lignite Fly Ash as a Soil Amendment
… Sacul sandy loam, and a sandy clay loam strip-mine spoil. Mixtures contained 0, 25, 50, 75 and 100 percent fly ash. After six months, soil fly ash mixtures were analyzed for N, P, Ca, Mg, K, Na, Mn, Zn, pH, cation-exchange capacity, percent base saturation, and texture. Needle and root tissue …
-
Geophysical investigations of near-surface mine sites in northern West Virginia
The production of acid mine drainage (AMD) from surface and underground coal mine sites in northern West Virginia is a major environmental problem and continues to receive much attention in affected communities. Reclamation efforts at these sites often require extensive and costly treatments and …
-
Hydroseeding pine-grass-legume mixtures for erosion control and reforestation of mine spoils
… pine (Pinus spp.) as affected by two mine-spoil types (siltstone and sandstone), two fertilizer levels (control and 100 kg/ha each of N, P, and K), and three mycorrhizal inoculation treatments (control, 56 kg/ha pine litter, and 250g/ha Pisolithus tinctorius spores) were evaluated in a …
-
Photosynthetic adaptations in grasses to abnormal levels of soil cations
… provided a range of abnormal levels of cations; mine spoil sites with heavy metal contaminations, calcareous and acidic sites with contrasting levels of cations particularly calcium and serpentine sites with low calcium and high magnesium and nickel levels were sampled. Barley and lettuce were …
-
Comparison of Groundwater Seepage Modeling in Approximate Original Contour and Geomorphic Valley Fill Design
Excess spoil generated during surface mining in southern West Virginia is generally placed in headwater valleys. Known as valley fills, these structures are designed to move water rapidly through constructed drains to maximize geotechnical stability using the conventional design method termed …
-
Long-Term Effects of Rock Type, Weathering and Amendments on Southwest Virginia Mine Soils
This study measured the effects of spoil type and amendments on Appalachian mine soil properties over time. The Controlled Overburden Placement Experiment was installed in 1982 in two parts, the Rock Mix (RM) Experiment compares mixes of sandstone (SS) and siltstone (SiS) spoils while the Surface …
Page 1 of 2