Today coal is among the most important energy sources. In order to meet the world's energy demands, low-calorie lignite with a high ash content is generally used in the large capacity coal-fired thermal power plants. As a result of coal firing, wastes such as fly ash, slag, and flue gas are also produced. Subsequently, toxic trace elements within coal are transferred to wastes such as slag, fl...

INTRODUCTION It is important, for mining feasibility studies, to be able to accurately convert in situ coal volumes to tonnages using coal densities. The density of coal of c”nstant rank varies depending on the am”unt of included rock (mineral matter), water, and void porosity. Actual measurements of density often require adjustment because data are needed at different ash, water or porosity va...

Tabas mines in Iran have coal sources which are suitable for use in metallurgy industries as coking coal. But the high sulfur content of this coal imposes severe limitations on its utilization as the sulfur oxide gases evolved from the combustion of high sulfur coals result in acid rains and corrosion of equipments. In this work, attempts have been made to reduce sulfur from high sulfur coa...

The longwall mining method is one of the most applied methods in extracting low-inclined to high-inclined coal seams. Selection of the most suitable extraction equipment is very important in the economical, safety, and productivity aspects of mining operations. There are a lot of parameters affecting the selection of an extraction equipment in mechanized longwall mining in steeply inclined coal...

Electricity production in India is projected to expand dramatically in the near term to energize new industrial development, while also easing the energy shortages throughout the country. Much of the new growth in electricity production will be fueled by domestic coal resources; however, there is worldwide concern about increased coal use, as greater carbon dioxide (CO 2) emissions from coal co...

In this paper, factors controlling natural gas accumulation in the southern margin of Junggar Basin were mainly discussed by a comparison with generation and Kuqa Depression Tarim Basin. The are located on north south sides Tianshan Mountains respectively, they share similar sedimentary stratigraphy tectonic evolution history. recent several decades, many large fields have been found Basin, but...