[1]Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China(School of Mines, China University of Mining & Technology), Xuzhou 221116, China;
[2]Faculty of Resources and Safety Engineering, China University of Mining and Technology (Beijing),Beijing 100083, China;
[3]Guizhou Xinlian Blasting Engineering Group Co., Ltd., Guiyang 550002, China;
[4]Department of Mining and Mineral Resources Engineering, Southern Illinois University,Carbondale, Illinois 62901, USA;
[1]Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China(School of Mines, China University of Mining & Technology), Xuzhou 221116, China;
cable truss system; thick coal seam; roof separation; pre-tightening force;