Modelling of gas communications with application to abandoned Ida Mine in Ostrava-Karvina Coalfield

Abstract

Protection of building objects regarding a possible gas escape from closed mine excavations to the surface is a problem we can see in OKR very often. To prevent successfully gas emission it is necessary to specify a methodical procedure of this risk solution. Implementing such procedure is increasingly needful especially considering reducing mining in OKR and thus uncontrolled gas emission from these areas. At first, we need to determine the value of residual gases emission. According to this value we then determine the manner of enclosure. Two possibilities are introduced in the paper. We can use either the way, in which the gas will be taking away from settlement by means of boreholes or better by methane drainage pipeline. The better possibility is leaving the drainage pipeline in the shaft before filling, through which we can take away the residual coal gas capacity.