Reconstruction and analysis of PNM for free accumulation of rock blocks in fully mechanized top-coal caving goaf of coal mines
ZHANG Hongshuo, GAO Ke, YU Jiankang, LI Qiwen
China Safety Science Journal . 2026, (2): 153 -162 .  DOI: 10.16265/j.cnki.issn1003-3033.2026.02.1508