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Gas Drainage Boreholes in Gob Reasonable Arrangement Study
Author(s): 
Pages: 1-4
Year: Issue:  5
Journal: Coal

Keyword:  gas drainagecaved zonefractured zonegas migrationbore arrangement;
Abstract: In order to drainage the goaf gas more effective, it needs to study gas drainage boreholes in gob reasonable depth.According to the analysis of the“three zones” height of mining overburden roof strata, it draws the heights of caved zone and fractured zone are 9.4~13.8 m and 37.09~73.4 m, the average 55.25 m.Simulation on gas migration in gob, it draws the scope of 45~60 m from vertical height of mining face is Gas enrichment area.Considering the “three zones” height of mining overburden roof strata and the rules of gas migration in gob, it draws gas drainage boreholes in gob should be 45~60 m from gob and be in fractured zone.
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