change of mining technique from open pit mining to underground mining  露天转地下开采

full-mechanized caving mining with large mining he  大采高综放

Full-mechanized Caving Mining with Large Mining Height  大采高综放; 大采高综放开采

fully mechanized caving mining face with extra long mining length  大采长综放面

fully mechanized mining with great mining height  大采高综采

mining damage due to mining  采动损伤

mining hight fully mechanized mining  大采高综采

the change from underground mining into open mining  地下转露天开采

transition from open cast mining to underground mining  露天转地下

underground Mining and Open Pit Mining  井露开采

“three unders” mining  三下采煤

1000m mining depth  千米采深

3D mining CAD  三维采矿CAD

6 kV cabtyre cables with monitoring shield for mobile mining applications  6kV矿用移动屏蔽监视型橡套软电缆

a gold mining area in Xiaoqinlin  小秦岭某金矿区

abandoned area of mining  采矿废弃地

abandoned manganic mining site  矿区废弃地

Abandoned Mining area  矿业废弃地

Abandoned Mining Land  矿业废弃地