Variation rule of branch fracture propagation pressure.

Abstract

<p>(a) Δσ=0 MPa, K_<b>IC</b>=0.8 MPa m^0.5; (b) Δσ=0 MPa, K_<b>IC</b>=1.6 MPa m^0.5; (c) Δσ=5 MPa, K_<b>IC</b>=0.8 MPa m^0.5; (d) Δσ=5 MPa, K_<b>IC</b>=1.6 MPa m^0.5; (e) Δσ=10 MPa, K_<b>IC</b>=0.8 MPa m^0.5; (f) Δσ=10 MPa, K_<b>IC</b>=1.6 MPa m^0.5.</p