Non-Darcy Flow in Hydraulic Flushing Hole Enlargement-Enhanced Gas Drainage: Does It Really Matter?

Figure 2

A conceptual model for gas transport in the coal seam [15, 16].

(a) A conceptual model for gas transport modified after Zuber et al. [15]

(b) Deviation from linear Darcy law modified after Bloshanskaya et al. [16]