Gopal Rajak, and Hemant Kumar. “Determination of the Stability of Pit Slope of the Opencast Coal Mines Workings by Underground Mining”. Journal of Mines, Metals and Fuels 71, no. 3 (May 24, 2023): 320–326. Accessed November 7, 2024. https://informaticsjournals.co.in/index.php/jmmf/article/view/33713.