Abstract: No.2 coal seam roof in the Northern Yulin-Hengshan mining area commonly contains thick hard rock strata, characterized by large fracture intervals during the first weighting of working faces and prone to intense ground pressure behavior during caving.Taking the 2202 working face of Balasu Coal Mine as an engineering case study, based on the analysis and comparison of underground and surface hydraulic fracturing technical parameters, a three-dimensional hydraulic fracturing for initial roof caving was implemented.The results show: Underground short-hole fracturing technology, underground long-hole hydraulic fracturing, and surface hydraulic fracturing are respectively suitable for weakening low-positioned, mid-positioned, and high-positioned rock strata.For the 2202 working face containing multiple layers of thick hard strata, a multi-level three-dimensional hydraulic fracturing technical solution was proposed based on industrial design concepts.This solution employs underground short-hole fracturing to address low-positioned thick hard strata, underground directional long-hole fracturing for mid-to-high positioned strata, and surface hydraulic fracturing to weaken the integrity of high-positioned strata.Post-fracturing monitoring revealed that the roof collapses simultaneously with mining operations, while stresses at the coal wall and ahead of the working face significantly decrease.The results demonstrate that hydraulic fracturing technology can effectively weaken the integrity of thick hard roofs, mitigate ground pressure behavior, and ensure safe coal mining in working faces.