Experimental Study on the Permeability of Weakly Cemented Rock under Different Stress States in Triaxial Compression Tests

Table 2

Summary of rock permeabilities in different stages during the process of complete stress-strain.

Lithology

(m^2)

(m^2)

(m^2)

(m^2)

Ratio

Mudstone

2.5607 × 10^−19

3.8128 × 10^−20

3.1005 × 10^−19

2.7261 × 10^−19

6.717

1.211

1.065

Shaly coarse sandstone

2.2712 × 10^−17

3.0099 × 10^−18

4.0595 × 10^−17

4.0181 × 10^−17

7.546

1.787

1.769