Abstract: On account of the extra thick Luohe aquifer as a key stratum existing in the roof and the small-pillar skip mining method used in Panel Two-Four of Tingnan Coal Ming,surface subsidence monitoring was carried out throughout the mining process by means of survey lines set on the surface and GNSS-RTK device at the openings of boreholes. The subsidence data of the surface survey lines along dip shows that the subsidence caused by the first face is very small,and that caused by subsequent mining increases significantly. The advanced influential distance of Z1 and Z2 boreholes is obtained from monitoring data at their openings,and it is determined that the advanced influential range of Face 2412 can reach at least 376.5 m. The current speeds of subsidence of at the openings of Z1 and Z2 are 3.4 mm/d and 2.3 mm/d,respectively. Through the analysis of the dynamic process of surface subsidence and horizontal movement in three working faces, it was found that the boundary rock strata within the mining range will continue to move towards the goaf center,and this trend and pattern will continue to appear in the later stages as the number of mining faces increases.