Chong, Gao, Feng You-li, Wang Qi-sen, Wu Ya-lin, and Zhang Zhuo. “Study on Geological Environmental Impact Assessment and Control Measures for Pingdingshan Tianan Six Coal Mine”. Engineering And Technology Journal 5, no. 07 (July 31, 2020): 720–725. Accessed July 22, 2024. https://everant.org/index.php/etj/article/view/391.