Numerical investigation of the in situ gas explosion fracturing and the enhancement of the penetration in coal seam boreholes
Yonggang Qiao,
Zeyu Zhang,
Danping Yuan
et al.
Abstract:Permeability enhancement of low permeability coal seams is a key tool in coal mine gas extraction and utilization. Numerical investigations are used to analyze the geometric parameters of the drilled gas cavity and the effect of initial pressure on explosion parameters to explore the potential of original gas blasting in enhancing crack penetration in coal seams. On the basis of these analyses, the changes in characteristic parameters of the coal body under blasting pressure are examined. The results show that… Show more
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