Your operation’s purpose is to get through the rock (or overburden) to expose the minable coal layers. In order to do this you blast using explosives, and then excavate and move the rock using bulldozers and other heavy equipment.
Tribal Energy and Environmental Information: https://teeic.indianaffairs.gov/er/coal/impact/construct/index.htm
Appalachian Voices (scroll down to the section on Blasting and Flying Rock): http://appvoices.org/end-mountaintop-removal/community/
The Strip Mining Handbook (Scroll down to the sections on: Mountaintop Removal Method, Environmental Effects, and the last 3 paragraphs of Water Resource Damage): https://sites.google.com/site/stripmininghandbook/chapter-2-1
Science X: https://phys.org/news/2016-02-central-appalachia-flatter-due-mountaintop.html
The World Counts: http://www.theworldcounts.com/stories/Negative-Effects-of-Coal-Mining
One Green Planet (Scroll down to the section on Air Quality): https://www.onegreenplanet.org/animalsandnature/mountaintop-removal-impact-on-animals-environment-and-human-health/