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By David Green

Power point slides

Jan 1, 1999

Abraham E.M., 465 Adam K., 151, 203, 249 Agioutantis Z., 137, 389 Alley M.M., 301

Jan 1, 2007

By Ian Hutchison, Michael C. Salmon

TRC'S INNOVATIVE EXIT STRATEGIES™ FOR MINE CLOSURE , MINE "EXIT STRATEGIES™", WHAT IS AN EXIT STRATEGY™?

Jan 1, 1998

By Jozef Stachulak

Prof. H. Bystron: "An Application of the First Law of Thermodynamics to Winter Dry Air Flow in Mr. Stachulak's Mine Model". [ ]

Jan 1, 1980

By Gordon P. Riddler

IMMM Reporting Code 2001 – Some Developments -General definition of a Competent Person -Rules of Conduct with Guidelines -Table of Generic Terms with Guidelines -More specific to non-metallic minerals -Word ‘ore’ is not used for reserve/resource categories -More definitive on Mineral Exploration Results

Jan 1, 2003

By J. G. Nalven, J. A. Sturgess

On July 1, 1999, most domestic metal mines will have to report releases of toxic chemicals into the environment for the first time as required by SARA Title 313. Some of these reportable releases will appear huge in relation to reports by other industries. The reasons for the potentially large reportable releases, special considerations for mining operations, and strategies for dealing with the reports are described. Data composited from experience with several mining companies is presented in the context of a typical goldmine.

Jan 1, 1999

By Bekta? Uz

The study area is located between Orhangazi and Sapanca geographically known as Armutlu Peninsula (Figure 1). It is steep broken and mountainous with an area of 4000 km2. [ ] Economic marbles are investigated in regionally such as Orhangazi, Elmali, Menek?eyayla, Sapanca, Pamukova and they are seperated approximately 800 km2 (Figure 2). These marbles are massive, thick and dispersed as small sized outcrops in Armutlu Peninsula.

Jan 1, 2005

By K. F. Hollberg, D. Graehl, L. Despain

OCI Wyoming's recent expansion of its surface Soda Ash production facilities outstripped the mine's ability to supply Trona ore necessitating infrastructure changes to the mine. A computer simulation of the mine's production systems along with the surface facilities was created to determine the most economic investment alternatives to increase mine production. This paper describes the development of the simulation model; the results obtained, and discusses the issues involved in using simulation modeling for mine production system design.

Jan 1, 2002

By Janusz Cygankiewicz, Marian Branny, Józef Wactawik

The paper presents mathematical model of concealed fire. We consider a porous medium (goaf, coal fissures) through which air flows. The set of equations is constituted by transient, two dimensional mass, momentum and energy balance equations with sources describing oxygen loss and heat generation caused by coal oxidation. Paper presents several examples illustrating the phenomenon of spontaneous heating in goaf areas behind longwall faces.

Jan 1, 1997

By Stanley Dempsey

Mine developers commonly undertake projects that require more funds than they can invest themselves. From that point until they are able to complete a "bankable" feasibility study, they require access to venture capital. In the United States, most venture capital has been provided to the small mining segment of the industry through tax advantaged limited partnerships. Recent changes in Federal tax law makes other forms of financing competitive, and the use of corporations and private and public offerings of shares may soon become more popular ways of securing venture capital. A number of new financial services firms have entered the mining finance business in recent years. They provide mine developers with access to venture capital.

Jan 1, 1987

By R. L. Grayson, J. R. Warneke

Environmental conflict between the public and private sectors, including mining, is highly visible and often based on deeply divergent environmental, social, and economic values. In order to achieve sound public policies by government, scientifically rigorous and objective analyses of mining’s impacts are demanded. Material flows accounting and analysis, linked with other data to generate indicators of environmental, social, and economic impacts of mining activity are means toward providing cogent input into public policy-making on key issues. This paper will present a material flows analysis scheme for the coal industry and recommend derived, objective indicators of coal mining’s impact on society.

Jan 1, 2004

By John D. Batty

With the emergence ofbiooxidation as a viable process for the pre treatment of refractory gold ores, so have the number of publica­tions on this topic increased dramatically. To a novice in the field of biooxidation, the infonnation presented is often confusing and sometimes even incorrect. Infonnation has also been published that is misleading in that it highlights a particular feature of a process that is either totally irrelevant or of no consequence to the ultimate goal viz. achieving the maximum economical gold recovery. To assist a potential user of biooxidation in evaluating the available published infonnation some guidelines or considera­tions for some of the more important aspects are given, as well as some extracts from publications that demonstrate the manner in which information has been presented.

Jan 1, 1996

By K. R. Johnejack, R. Quintanar, P. Lapointe

Chino Mines Company has investigated effects from historical mining to sediment along Hanover and Whitewater Creeks. Concentrations of metals were statistically stratified for risk assessment. Stratification by size was more prevalent than by depth, with concentrations higher in the fines. Concentrations with depth were mixed, but overbanks showed more stratification with higher concentrations in the surface. Members of a geomorphic feature type generally were not stratified. However, geomorphic features were stratified by type, with the active channel and bars being the most alike and the overbanks being the most different. Only a few metals showed decreasing concentrations with distance downstream.

Jan 1, 2002

By R. L. Grayson

Compliance standards for respirable dust, which are reduced because of high quartz concentrations, have become an industry-wide problem. Research on the physical and chemical character of quartz-classified particles in respirable coal mine dusts indicates that they may exist in intermixed layers or may he coated by clay or coal material. The relative amount of intermixing varies with the coal seam being mined. If most of the quartz particles of a mine dust are "pure," then the dust may have a high fibrogenic risk potential because of truly free silica and the compliance standard should he lowered. If, however, the quartz is locked inside another material matrix, or coated, a reduced compliance standard may not he appropriate.

Jan 1, 1991

By Hayward B. Oblad, Anthony G. Fonseca

Coal flotation has been practiced since about 1920 in Europe and since about 1926 in the U.S. Over 200 U.S. coal preparation plants now use the process to recover coal. Over the 60 year period, the fundamental principles upon which flotation is based have been enumerated, but the interaction between the parameters that affect flotation has not been quantified and a useful model which accounts for these parameters has not yet been developed. A comprehensive and user friendly kinetic model coupled with better process monitoring and control instrumentation would allow plant operating personnel to better predict flotation performance and better control the flotation process in coal preparation plants.

Jan 1, 1989

The objective of this international conference was to assist the mining and minerals industries in their global transition to sustainable development. The main theme of the meeting, therefore, was the development, monitoring and assessment of sustainable development criteria for mineral operations. Emerging technologies that can assist in the development of criteria and performance measurements were also presented at the meeting. A goal of the conference was also to conclude with a consensus plan and a process, representing a variety of stakeholders, which can provide guidance to the global minerals community on the path to sustainable development. A number of papers were not submitted in time to be included in the printed proceedings. Hence this addendum was compiled and includes last minute paper submissions. The pages of this addendum are numbered consecutively to the main volume of proceedings, so that when a reference is made to a paper, a proper page number may be quoted.

Jan 1, 2003

By Rudy Rogers

When Gas hydrate formation rates have two steps: a nucleation induction step and an agglomeration step. Hydrate induction in distilled water is extremely slow because of lack of nucleating particles. Our laboratory found that synthetic anionic surfactants greatly improve both hydrate induction and agglomeration because the surfactant?s hydrophilic head absorbs water molecules and the hydrophobic tail absorbs hydrocarbon gas molecules, creating necessary nucleation sites. Vast hydrate deposits inhabit seafloors. What is the seafloor hydrate nucleating mechanism? We find that nano-particles of smectite clays (bentonite and nontronite) are hydrate-nucleating sites in sea-water-saturated, packed porous media, especially when trace quantities of anionic biosurfactants adsorb on the clay particles. Microbes and their bioproducts proliferate around seafloor gas hydrate accumulations. The seafloor microbe-mineral-hydrate synergy is explored in this paper. Keywords: gas hydrates, biosurfactants, crystal nucleation, smectites

Jan 1, 2008

By H. Hejny

The objective of the project is to construct and operate a pan-European underground drainage and minewater management research centre, which would be the hub for data gathering and dissemination in real time of new data to users for analysis and interpretation, as well as serving as a model for consistency, for other centres at key water management sites throughout Europe which would feed data in real time through the hub. The data from the centre will be essential for informing River Basin Management Plans arising from the EU Water Framework Directive, which is an important driver for the project. The implementation of this Directive sets out a requirement for all Member States to develop River Basin Management Plans for all water resource systems. The facility would be a major contribution to sustainable water management in Europe.

Jan 1, 2007

By C. Vasquez, A. Nieto

In past drilling programs for a multi-seam Texas lignite reserve, extensive e-log data was collected; however, little laboratory analyses were performed. As a cost and time saving incentive, sampling of lignite was intensified. In a recent drilling program in east-central Texas, detailed laboratory analyses and e-log information was gathered on a multi-seam lignite reserve of the upper Wilcox Group. This data will undergo statistical and geostatistical techniques in an attempt to discern whether or not predicted Ash and Btu/lb values can be derived from the e-log gamma-density relationships. Final characterization of the dataset will be used in a geostatistical model of that reserve. This model will be the basis for further geological investigations and mine planning.

Jan 1, 2004

By J. E. Lees

Advanced remote sensing can be a powerful new information tool to help private and public entities make better environmental and resource management decisions. However, some regulated entities are reluctant to develop or use this tool because of their concerns that it will lead to increased risks and costs of environmental legal liability. They fear that new ways of monitoring the environment will increase liability, undermine existing enforcement agreements, reopen compliance agreements, and generally provide a competitive disadvantage to early adopters by accelerating environmental cleanup costs. Others counter that the increased risks are marginal, and that several advantages outweigh these risks, including the opportunity to more effectively manage environmental operations, target and set priorities, measure and track management and compliance effectiveness, provide more defensible environmental assessments and baseline conditions, make and defend optimal siting decisions, and avoid or resolve environmental disputes. This paper offers strategic advice on ways regulated entities can enjoy the benefits of these powerful new information tools while mitigating down-side legal and compliance risks as much as possible.

Jan 1, 1999