Study on 3D Modeling of Complex Coal Mine Interface - Qianlin Dong; Yang-Ming Jiang; Zhi-chao Hao; Wei-dong Li; Ke Wang; Xing-dong Wang; Qingyuan Li (Image and Graphics Technologies and Applications - 14th Conference on Image and Graphics Technologies and Applications, IGTA 2019, Beijing, China, April 19-20, 2019, Revised Selected Papers, 2019)