Abstract: The mining of steeply inclined coal seams near outcrops in North China-type coalfields faces high risks of water inrush from loose roof aquifers.Traditional coal pillar design methods often yield suboptimal engineering outcomes due to neglecting dip angle effects and dynamic hydrogeological responses.To address the water inrush hazards in steeply inclined outcrop coal seams, we focus on the 3601 working face in Chenmanzhuang Coal Mine.By integrating multi-source exploration technologies, including underground drilling, surface boreholes, and acoustic logging curve interpretation, the thickness of bedrock weathering zones, the permeability coefficients of Quaternary aquifers, and creep characteristics of laterite aquicludes were systematically investigated.Applying the “Regulations for Coal Mining Under Buildings, Water Bodies, Railways, and Main Shafts”(GB 51060—2014) and field analogy methods, the water-resistant coal and rock pillars were calculated.The results demonstrate that full-seam safe mining can be achieved in the 3601 working face without height restrictions.