In situ monitoring and analysis of the mining-induced deep ground movement in a metal mine

An extra-deep multiple-point borehole extensometer, applicable up to 300 m depth of cover, is introduced for the deformation monitoring of the deep rock masses (i.e., the rock mass below the ground surface) in the eastern area of Jinshandian Iron-ore Mine, and the in situ monitoring results collected over eight years are analysed. Combined with the deformation monitoring results on the ground surface collected by using a Global Positioning...