�?�?t ρ l k + �?�?x i ρ l k v l = �?�?x j μ + μ t σ k �?k �?x j + G k �?ρ l ε �?Y M Exceeding fracture tension: Bad estimation of formation strength and slim pore–fracture windows usually cause unintended fracture propagation. Successfully Submitted (Awaiting Approval)