Výstup metanu v poddolovaných oblastech v závislosti na klimatických podmínkách

Abstract

Ostrava's mines have always been characterized by a pronounced complexity and have been classified as mines with the highest risk of methane occurrence in terms of mining safety regulations. The Ostrava-Karvina agglomeration with an area of approximately 600 km2, built on a coal deposit with a past intensive mining activity, faces the negative manifestations of mining activity - especially the output of mining gases (methane) to the surface. The whole region is densely populated and the population is only about 300,000 in Ostrava. The output of methane to the surface creates a risk of extraordinary events in its vicinity. This fact is documented by a list of dozens of accidents, caused by methane discharges to the surface, often associated with the presence of old mining works in the past, which have not been sufficiently destroyed and secured. The main parameter that fundamentally influences the output of the meta-air mixture to the surface is undoubtedly the barometric pressure. In addition to this, other climatic conditions, such as rainfall, wind or temperature, can play its role. The comparison of the effects of the last mentioned quantities will be the main thematic objectives of this dissertation.