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In post-mining areas appearance of uncontrolled mining gas exhalations can be observed. Methane migrating through the strata, together with soil air may create explosive mixtures. Occurrences of mining gases are caused due to discontinuation of water pumping process in abandoned mines and fast rising and restoration of water table. However, itпїЅs not obvious, that all hydrocarbons in soil pores come from abandoned hard coal mines. Often in soil pores mixtures of microbial and thermogenic gases are observed. For i...

During longwall mining extraction, extremely high permeable spaces, called пїЅgobsпїЅ, are often created within crushed strata. Those gobs and abandoned: pathways, tunnels, ventilation entries or shafts, could be capacious storage deposits for coal-released gases, particular methane. This methane may be valuable source of both, energy and heat production, in active and post mining areas. Gases form crushed, fractured zones are explored by vertical boreholes drilled from surface, called gob gas ventholes (GGVs). GG...