subject analysis of the potential of spontaneous combustion in coal layers with analytical and numerical methods has been always considered as a difficult task because of the complexity of the coal behavior and the number of factors influencing it. empirical methods, due to accounting for certain and specific factors, have not accuracy and efficiency for all positions. the rock engineering syst...

0016-2361/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.fuel.2009.11.005 * Corresponding author. Tel.: +86 10 82320892; fax E-mail address: [email protected] (Y. Yao). Nuclear magnetic resonance (NMR) has been widely used in petrophysical characterization of sandstones and carbonates, but little attention has been paid in the use of this technique to study petrophysical properties of coal...

Spontaneous combustion of coal is one of the most horrifying hazards in coal industries, especially in underground coal mines. Thus having a prior knowledge about the occurrence of this phenomenon in underground coal mines is of crucial importance in preventing this process, loss of life, huge economic loss, and environmental pollution. The aim of this work is to determine the spontaneous combu...

The purpose of this study is to characterize the relationship between organic material and thermal maturity during the process of evaluation of hydrocarbon potential. Samples studied include Miocene high volatile bituminous coal and coaly shale collected from outcrops and exploration wells in Hsinchu-Miaoli area, NW Taiwan, density centrifuge separated macerals, bituminous coal and anthracite f...

This paper deals with the methodology of modelling the Dubňany lignite seam base and its tectonic failure. Tectonic pattern of the Vienna Basin has been subject of many studies. Opinions on its origin have been developing. Coal seams in the South Moravian Lignite Coalfield were modelled under the project of the example modern evaluation of the coal deposit. Designed software with application of...

The presence of coal in complex structures featuring sandstone reservoirs seriously hinders reservoir characterization and the identification fluids subsurface formations. Coal can strongly obscure reflections from sandstone, easily leading to false bright spots during exploration; thus, their boundaries cannot be accurately described. Furthermore, layers intercalated with thin seams form compo...

In view of the problem serious water accumulation and frequent accidents in coal mine mining area, distribution range Yuzhou Shenhuo Kuanfa Mining Coal (hereinafter referred to as Mine) is detected by transient electromagnetic method. The emission wire frame 480m × 480m, frequency 8Hz, power supply current 16A. research conclusion preliminarily determines that controllable source audio earth me...

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 coal of...