Initiation Pressure and Fracture Path of Near-Field Symmetric Pre-cut Hydraulic Fracturing

To reduce the use of explosives in the metal-mining process, a pre-cut hydraulic fracturing technology has been proposed for directional pretreatment of rock strata, in which the initiation pressure and the fracture propagation path are crucial aspects of the fracturing pretreatment. In this study, the stress distribution in the near-field metal ore body of the upward horizontal filling mining method was calculated. At mining workface l = 0, σ y > σ x = 0, as the horizontal distance l increases from the workface and σ x first increases and then decreases, causing σ y to gradually decrease. In addition, l 0 exists such that 0