BEDDING BOREHOLE-BASED GAS EXTRACTION METHOD CAPABLE OF AVOIDING AIR LEAKAGE

摘要

A bedding borehole-based gas extraction method capable of avoiding air leakage, comprising two stages, i.e., building a main gas extraction system and building an auxiliary gas extraction system: firstly, a main gas extraction pipeline (9) is laid inside a roadway (11), bedding extraction boreholes are constructed, the bedding extraction boreholes are sealed, and borehole-based gas extraction pipes are connected to the main gas extraction pipeline to perform gas extraction; and after all the boreholes in the roadway are sealed for extraction, an airtight wall is constructed at an opening of the roadway where the boreholes are constructed, an auxiliary gas extraction pipeline (10) is laid, and the auxiliary gas extraction pipeline (10) is connected to an auxiliary gas pump extraction pipeline to perform auxiliary extraction. The method can effectively resolve the problem of serious air leakage in a bedding borehole-based extraction process, has a simple process, is easy to implement, and can reduce labor costs.