�?�?t ε l ρ l v l + �?�?ε l ρ l v l v l = ε l �?�?τ l + ε l ρ l g �?ε l �?p �?β v l �?v sExceeding fracture pressure: Weak estimation of formation strength and narrow pore–fracture Home windows usually bring about unintended fracture propagation. Fracture geometric parameters exert differential control on drilling f