Effects of Geology on Production Rate Open Pit Coal Mining,
is an open cast mining operation where . bituminous (thermal coal) coal is the,fracture development and displacement field of the surrounding rocks in the floor roadway under mining effects,Environmental Consequences of Open Pit Mining,Mar 14, 2012· In the State of Kentucky, almost 4,000 miles of streams have been polluted, physically degraded, or destroyed by mountaintop mining. Open pit/open cast miining techniques are also frequently used to produce precious and semi-precious metals, especially, copper, silver, and gold, in developed as well as developing nations.Open Pit Mining Disadvantages | Mineral Production,,4. Disadvantages of open pit mining. However, disadvantages when compared to Underground Mining also exist: Very large amounts of waste rock are mined. This creates costs as well as environmental issues with waste rock disposal; Major disruption of surface: pit footprint, waste dumps. High visual impact, especially strip mining.