Analysis and Engineering Practice of Factors Affecting Top-Coal Recovery in a Large Dip Coal Seam by Xinglong Huang, Ying Chen, Yang Li, Fengshuo Jia, Shengjian Liang, Xiufeng Zhang, Yang Chen, Qianjia Hui, Zhiwen Wang, Zhaoju Zhang, Zhijie Zhu, Dequan Sun

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