Abstract: In order to investigate the movement law of thick overburden under full mechanized caving，rock movement monitoring station is built at W1303 face surface of Gaohe mine in Changzhi minging area.The analysis of the measured data showed that maximum subsidence point was located in the upper goaf Z29，Z30，Z32，and a series of strata movement parameters were obtained.The theoretical analysis indicated that the overburden movement deformation was divided into early and late two kinds under full mechanized caving.At the same time，the main factors for influencing the overlying strata movement were concluded as follows：overburden lithology，the location and action of the key stratum，mining size，advancing speed of working face and roof management and so on.The numerical simulation software FLAC3D was adopted to simulate the surface movement law in the mining process with the topsoil thickness of 140 m，190 m，240 m respectively.The conclusion was that the movement law of overburden thickness at 190 m conforms to that of actual surface layer at 189.43 m.Therefore，the research on the rock movement law of thick overburden under full mechanized caving mining in Changzhi mine provides a certain reference for construction of the mine.

Key words: Full mechanized top coal caving, Thick overburden, Strata movement, Numerical simulation