The Yushen mining area contains thin bedrock and a shallow buried coal seam. where JingLe group Hipparion clay and Lishi loess serve as a high-quality cement insulation cover. This study investigates the properties of the clay layer to determine the effect of the clay aquiclude on the mining water variation and fracture characteristics. Unloading hydraulic jack experiments were perfor... https://www.nacrack.com/