TRAIL - Technical Report Archive and Image Library

Spectral characteristics of grinding sparks used for identification of scrap metals

Ground control study of a mechanized longwall coal operation in West Virginia

Recovering zinc-lead sulfide from a geothermal brine

Compaction criteria for metal and nonmetal tailings

Wear and corrosion of 12 alloys during laboratory milling of phosphate rock in phosphoric acid waste water

Separation of cast and wrought aluminum alloys by thermomechanical processing

Ground-penetrating radar for strata control

Analysis for impurities in helium using the helium ionization detector

Improved shearer-clearer system for double-drum shearers on longwall faces

The phase relationship of talc and amphiboles in a fibrous talc sample

Upgrading domestic high-iron chromite concentrates by carbonyl extraction of excess iron

Chlorine-oxygen leaching of a low-grade zinc sulfide flotation concentrate

Bulkheads and drains for high sandfill stopes

Fiber reinforcement of sulfur concrete to enhance flexural properties

Coal mine air tempering :effectiveness, design, and roof support

Evaluation of a ground penetrating radar system for detecting subsurface anomalies

Fiber dimensions of crocidolites from Western Australia, Bolivia, and the Cape and Transvaal provinces of South Africa

Recovery of metal values from copper converter flue dust

Plasma-sprayed iron-base wear-resistant coatings containing titanium diboride

Conical bit rotation as a function of selected cutting parameters

Hot acid leaching of vanadium from western phosphate beneficiation tailings

Fracture zone dewatering to control ground water inflow in underground coal mines

Computer program to relate dust generation to drum-type coal mining machines

Determination of alpha quartz particle distribution in respirable coal mine dust samples and reference standards

Electrochemical determination of thermodynamic properties of MnF₂ and CoF₂

Blast vibration measurements near and on structure foundations

Rock stability analysis using acoustic spectroscopy

Vanadium extraction from Idaho mudstones

Procedures for determining support of excavations in highly yielding ground

Electrical ignition energies and thermal autoignition temperatures for evaluating explosion hazards of dusts

Geotechnology in slate quarry operations

Measurement of air velocity in mines

Utilization of simulated coal gases for reducing iron oxide pellets

Removal of magnesia from dolomitic southern Florida phosphate concentrates by aqueous SO₂ leaching

Thermodynamic properties of CoS₀.₈₉, CoS₁.₃₃ and CoS₂

Exhaust ventilation of deep cuts using a continuous-mining machine

Solubilities of chloride salts of alkali and alkaline-earth metals when sparged with hydrogen chloride

Electrostatic sensitivity, strength, and no-fire current of short-delay detonators

Measuring formation pressures and the degree of gas drainage in a large coalbed gas drainage field

Large-scale laboratory drag cutter experiments in hard rock

Hydrochloric acid-oxygen leaching and metal recovery from copper-nickel bulk sulfide concentrate

The Effects of a retreating longwall on a three-entry gate road system

Analysis of sampling variance from certain platinum and palladium deposits in Alaska

Laboratory tests of spalling, breaking, and abrasion of wear-resistant alloys used in mining and mineral processing

Recovery of lithium from a montmorillonite-type clay

Using solvent-impregnated carbon to recover copper from oxidized mill tailings

A technology for integrity testing of in situ leach mining wells using a system of inflatable packers

Effects of water on coal cutting forces and primary dust distribution

Fire tests of five-gallon containers used for storage in underground coal mines

Flocculation of metal oxide and hydroxide minerals with cross-linked starches containing chelating groups

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