Improving Slope Stability of Lowwall Areas in Coal Mines: A Case Study Kartini, Dessy Lestari Saptarini, Rahma Norfaeda and Habib Sahal Khomaini E3S Web Conf., 622 (2025) 01009 Published online: 04 April 2025 DOI: 10.1051/e3sconf/202562201009