The process of deep mining of mineral deposits dynamically affects the overlying part of the rock mass and the ground surface, both during the mining phase and after mine closure. Understanding of the detailed dynamics has been made possible in recent years by the application of new techniques for continuous measurement of changes in surface deformation. Two years ago, we designed and initiated a unique high-precision Automatic Geodetic Monitoring (AGM) system in the CSM mine area (Upper Silesian Coal Basin, Czech Republic). The monitoring system comprises two automatic total stations with an integrated 3D laser scanner, GNSS sensors and other ancillary equipment, situated in the roofs of skip towers of the mine. Since the CSM mine is still in operation, sufficient data is currently available to evaluate the dynamic formation of the subsidence trough as a result of mining at great depth. The millimetre accuracy of the interpreted AGM data allows to capture in detail the process of the propagation of mining effects to the surface. The monitoring is conducted on an hourly basis, providing a markedly different dataset on the actual ground surface subsidence during mining than was previously possible with the use of levelling, which was typically carried out several times per year. The paper presents a detailed evaluation of ground surface subsidence during the mining of a 2.5 to 2.75 m thick coal seam at a depth of 1140 to 1250 m below the surface. The measured data of subsidence at selected points are evaluated and correlated with the mining advance, geomechanical and mining conditions, and registered induced seismicity. The interesting development of the subsidence trough as a function of the mining advance and geomechanical conditions, as well as the estimation of the parameters for the theoretical calculation of surface displacements are presented in the paper.