School of Geosciences and Surveying Engineering University of Mining and Technology-Beijing 100083;
State Key Laboratory of Coal Resource and Safe Mining University of Mining and Technology-Beijing 100083;
Satbayev University 050013;
Yaojie Coal and Power Group Company Ltd 730080;
Al-Farabi Kazakh National University 050040;
China Energy Investment Corporation 100000;
Ultra-thick steep coal seam; Horizontal slicing; Subsidence control method; Inversely-inclined slicing and upward; MINING; Application study;