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Recently, numerous landslides occurred in the southern part of the \"Ozen Dam (Sivas-Turkey) threatening the spillway. Kinematical analyses showed that the potential slope instability direction is NW corresponding to the dominant slope directions. Geotechnical surveys confirmed the rock slopes are highly prone to instability, and failures occurred in the limits between basement rock and debris material in the alteration zone as a planar surface. Pre-existing failures, excavations in the toe of the slopes, low qual...

The full impact of coyote blasting on the environment includes ground vibrations, air blast, fly rock and dust, and these are unavoidable in quarry operations if they are not controlled. The detonation of explosives for rock breakage induces a seismic disturbance that propagates in all directions from the explosion epicentre. In addition to the seismic disturbance, the detonation of explosives causes a transient pressure pulse that is propagated through the atmosphere. This phenomenon has been described in the lit...

The Bulgarian environmental legislation does not formulate special requirements for the performing of baseline environmental studies and the environmental impact assessment of the prospecting and exploration activities for oil and gas. The oil and gas exploration and prospecting activities are usually performed on areas of significant size, and are connected with specific impact on the environment, therefore it is accepted in the good international oil practice to perform obligatory baseline environmental studies ...

Twenty three (23) waste water samples, seven (7) soil and twenty two (22) plant ones from the region of the “Pernik” Central Preparation Plant (CPP) are a subject of study. A season method of sampling has been used . The water samples have been taken as follows: 1) water coming in the plant for preparation; 2) water, used during the dressing; 3) water used to transport the slime and fly ash; 4) water, running out of the slime storage; 5) water, that is draining. They have been tested by: ICP for Hg, Al, Cd, As...

Major and trace element concentrations were measured in representative fly ash samples from four Power Units of Agios Dimitrios Thermal Power Plant, Northern Greece. Major and trace element concentrations were also measured in the respirable-size fly ash fraction (<10$\mu$m) of the same samples, separated from the bulk fly ash by laboratory treatment. The respirable-size fraction, compared to the bulk fly ash was found richer in CaO and poorer in all other major oxides (SiO2, TiO2, Al2O3, Fe2O3, MnO, MgO, Na2O, K2...

Coal, Oil and Natural gas account for 30\%, 31\% and 2\% respectively of the world’s total energy. In India, coal based energy is the main source of energy and its energy demand is increasing at the rate of 9\% per year. The supply on the other hand is lagging behind. If this trend continuous, it is estimated that by the year 2022, India would be required to spend Rs. 860 billion per year to meet its energy demand. World attention has recently started shifting towards methane, which can be exploited from the coa...

Detailed geological and drilling investigations have shown KayabaЕџД± deposit, located in Trabzon-Turkey, has a resource of 590 000 tons ore containing 2.2\% Cu and 1029 kg Au. The ore body shows the characteristics of both massive- and stockworktype sulfide mineralization. In this study, mineralogical analysis and flotation tests were performed to determine the degree of liberation of sulfides and the optimum grind time for the massive ore samples. Covellite and chalcocite were identified as the main copper miner...

Blasting is not just an “empirical” relation between man (e.g., the blaster) and rock. This particular point of view has been proved to be correct and self-evident, mainly in major Public Works and Construction blasting, where the main part of the site activity often regards rock excavation within urban or sensitive areas. Such a risky and demanding operation should not be “left” only at blasters’ decision and experience. Blasting is considered to embody further scientific knowledge, know-how and technol...

Contemporary approach for mining investments has a strong support in initial investment documentation, which consist of expert studies, pre-feasibility, and feasibility studies. Based on the author’s personal experiences, this paper points to the mean of evaluation of investments in a starting phase, where actual examples of expert and feasibility studies have been applied.

In the present paper a grouting technique was studied in order to protect the buried monuments against the presence of the ground water. Krisis Macedonian Tombs in N. Greece was used as a pilot example for study, given that it is buried in loose sediments where the aquifer overflows their floors. Although the proposed method is expensive, it establishes permanent drainage conditions regarding to pumping. The purpose of this method is to create an impervious shell, which isolates the floor and the walls of the tomb...

In the presented article I deal with one part of the financial managing - capital decision in the conditions of the chosen firm. I will analyse and calculate effectiveness of the developing and most sophisticated capital activity of the firm, which should bring long-term effects, as well as to satisfy proportional development of the firm and to provide stable position on the market.

The degree of heavy metal (+As) water and vegetable contamination due to mining and metallurgical activities in the studied area is evaluated in individual and integral aspects. 267 ground, surface and waste water samples, according to the proposed grid, were investigated for trace elements, 56 of them for 34 elements: Al, As, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sb, Zn, Hg, Be, B, V, Sn, Mo, Se, Ag, Te, Tl, Ti, U, Ca, Li, Mg, Sr, Bi, Ga, In, K, and Na. The analytical work is performed with inductively coupled plas...

The presentation starts with a comparison between North Sea and West Black Sea in respect of maturity of hydrocarbon provinces and exploration efforts. In continuation of the presentation the integrated approach of OMV will be explained, the first reprocessing results of 1992 seismic vintage will be discussed and all planned further steps will be introduced which will lead to hydrocarbon play definition.

This paper provides an overview of the various issues influencing ore dilution in an underground mining. The paper reviews the dilution problem throughout the entire mining process, and provides a rational approach to underground mine design in order to minimize dilution. The stages contributing to dilution include orebody delineation, design and sequencing, stope development, drilling and blasting, and production stages. Vibrations generated by the drillingblasting operations during the ore production could accel...

One of the main subjects of the contemporary project or production/operations management is to make decision. In order to be successful, managers should use modern planning methods. Application of an accepted investment project is as important as its design. As the sources are limited eventually the accepted project which is designed with spending great sources and effort should be completed on time, it is necessary to use them efficiently and cleverly. One of the distinguishing features of contemporary project ma...

This paper summarises the results of the first phase of oil \& gas exploration of the B-Golitza Block. A revised geological framework will be presented, which puts the stratigraphy in a chronostratigraphic scheme, incorporating sequence stratigraphic architecture. Use of a chronostratigraphic framework for exploration of the block has enabled the exploration Play Elements to be identified and both their stratigraphic and aerial distribution to begin to be determined within an integrated methodology that incorporat...

During the last years there is a globalization of the informative treasure of the planet. The informative structures have been combining on social and even continental levels. International informative servers have been created already. Their ability for online usage and administration extremely easy the work of different professional groups. In this connection the geology data has to be qualified as vital and strategic one and respectively the designing of National, Regional Geological servers – for a prime tas...

The environmental problems arisen from ground vibration and air blast have been faced and discussed frequently in various industries such as mining, construction, quarry etc. where blasting operations are unavoidable. So the ground vibration effects induced by blasting on structures and human beings need to be predicted, monitored, and controlled. With the increase of the environmental constraints on the levels of disturbance induced by blasting operations nearby residents, there is also an increasing necessity to...

Many production open-spaces and slopes is occurred during or after both production and overburden stripping in coal open pit mines. Under these different conditions sometimes slope stability problems in pit embakments may occur resulting loss of money. In this article the design principles and range of instability of such embakments are introduced. The purpose of this study is to exhibit the methods of field rehabilitation and measures taking in to consideration against possible slope instability.

In recent years, use of paste backfill has evolved from an experimental backfill method with limited application to a technically viable and economically attractive alternative. This is primarily due to the development of dewatering and transportation systems that allow for controlled and consistent production and delivery of paste in a cost-effective manner. In addition, it has been recognized that underground backfill provides for a mechanism to safely dispose of mine wastes such as tailings, which results in co...