Mining Engineering Commons^™

Reference Data Set Of Volcanic Ash Physicochemical And Optical Properties, A. Vogel, S. Diplas, A. J. Durant, A. S. Azar, M. F. Sunding, William I. Rose, A. Sytchkova, C. Bonadonna, K. Krüger, A. Stohl

William I. Rose

Uncertainty in the physicochemical and optical properties of volcanic ash particles creates errors in the detection and modeling of volcanic ash clouds and in quantification of their potential impacts. In this study, we provide a data set that describes the physicochemical and optical properties of a representative selection of volcanic ash samples from nine different volcanic eruptions covering a wide range of silica contents (50–80 wt % SiO2). We measured and calculated parameters describing the physical (size distribution, complex shape, and dense-rock equivalent mass density), chemical (bulk and surface composition), and optical (complex refractive index from ultraviolet to near-infrared wavelengths) …

An Analysis And Policy Implications Of Comfort Levels Of Diverse Constituents With Reported Units For Blast Vibrations And Limits: Closing The Communication Gap, Braden Lusk

Braden Lusk

"Differences exist between public perception of construction blasting and quarry blasting. In general, people are able to tolerate short term inconveniences much better than long term ones. Quarries and other long term mining operations utilizing blasting are coming under increasing public and legislative pressure in the United States. The question being posed for the blasting industry is, "Has our past haste in adopting complex scientific scales and units been detrimental to us?" In other words, are the most palatable things being reported? The goal of this dissertation is to determine whether current units create an atmosphere of discomfort among neighbors …

Iron Pigments Through The Ages, Fathi Habashi

Fathi Habashi

Mining And Civilization, Fathi Habashi

Fathi Habashi

Tehran Subway Tunnel Settlement Analysis By Using Analytical, Experimental And Numerical Methods (Case Study: Station Of Imam Ali University), Innovative Research Publications Irp India, Javad Sadeghi, Hadi Hamidian Shourmasti

Innovative Research Publications IRP India

In The recent decades, the use of underground spaces including tunnels, railway, subway, cavern, underground spaces and others had great growth. Geological and geotechnical site conditions vary in different projects, requires different design, calculation and implementation methods also requires that the past experience and scientific and technical principles consistently applied. In this article we have tried to use the method of analytical, numerical and experimental investigation of the subway tunnel subsidence station of Imam Ali university

Understanding State Rulemaking Processes: Developing Fracking Rules In Colorado, New York, And Ohio, Sara Rinfret, Jeffrey Cook, Michelle Pautz

Michelle Pautz

Rulemaking is an integral component of environmental policy at both the federal and state level; however, rulemaking at the state level is understudied. With this research, we begin to fill that gap by focusing on rulemaking regarding the issue of hydraulic fracturing (fracking) in three states: Colorado, New York, and Ohio. This policy issue is well suited to begin exploring state-level rulemaking processes because the federal government has left fracking regulation to the states. Through semistructured interviews with a range of actors in the rulemaking process across these states, we establish a foundation from which future research in this area …

Policy Memorandum: Recommendations For Reforming The 1872 Mining Act To Impose Royalties For The Extraction Of Hard Minerals, Rachele M. Hendricks-Sturrup

Rachele M Hendricks-Sturrup

No abstract provided.

Avustralya'da Madencilik Ve Metal Kazanımı (Mining And Metal Extraction In Australia), Ahmet Deniz Bas

Ahmet Deniz Bas

No abstract provided.

Kinetics And Mechanisms Of Gold And Silver Dissolution In Cyanide Solution, Fathi Habashi

Fathi Habashi

The dissolution of gold and silver in cyanide solution is an oxidation–reduction process in which cyanide ion forms a strong complex with Au+ or Ag+ ions and the reduction of oxygen on the surface of metal may take place partially to the hydrogen peroxide stage or completely to hydroxyl ion.