Instability Mechanism of Voussoir Beam and Roof-Cutting Pressure Relief in Parallel Goaf: A Case Study of Shiyangou Coal Mine. - Zhang, Jie; Zhang, Chu; Yang, Tao; Wang, Bin; Gao, Shoushi; Qin, Guang; Sun, Jianping; Zhang, Yiming; Zhang, Xiaogang; Fan, Zhengyang (Applied Sciences (2076-3417), 2026)