Control of Water-Conducting Fracture Zone and Phreatic Response in Shallow Coal Seam Groups via Gangue Grouting Backfilling: An Integrated Field Monitoring and Physical Simulation Study. - Zhang, Jiaqi; Cheng, Xiaoming; Nie, Hongzhen; Zhang, Jixiong; Xing, Shihao; Han, Yong (Applied Sciences (2076-3417), 2026)