Hydraulic-Mechanical Coupling Model with Dual-Porosity Dual-Permeability for Anisotropy Coal Seams and Its Application in Mine Gas Extraction

Figure 12

Comparative analysis of gas pressure in two models at different locations. Gas pressure and pressure ratio at (a) Point A, (b) Point B, and (c) Point C.

(a)

(b)

(c)

(d)

(e)

(f)