Browse

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...

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...

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.

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...

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...

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...