Gas Seepage Model and Experiment Based on Bedding Effect of Fractured Coal Body

Figure 1

The system and physical figure of triaxial stress gas permeability simulation experiment device: (a) system figure and (b) physical figure. 1 – water tank, 2 – water flow meter, 3 – metering pump, 4 – water pressure gauge, 5 – the valve, 6 – O-ring seal, 7 – pressure chamber, 8 – confining pressure booster aprons, 9 – coal test specimen, 10 – oil pressure gauge, 11 – confining pressure control valve, 12 – axial pressure control valve, 13 – fuel tank, 14 – computer, 15 – pressure release valve, 16 – high pressure gas, 17 – gas pressure gauge, 18 – gas-water separator, 19 – the gas flow meter, 20 – damper, and 21 – vacuum pump.

(a)

(b)