caused by open pit mining in the mining area is shown in [12,13,14,15] Fig. 1 types of environmental disasters in open pit mine Integration technique of ecological restoration and mining in open pit coal mine Using green mining technique, the formation of coal mining and ecological restoration of the
PwC Open pit mining Mining Methods 5 Open pit mines are used to exploit low grade, shallow ore bodies. However, some pits are quite deep – about 1 km. The mining rate is greater than 20,000 tonnes per day (tpd) but is usually much greater.