关键词: 毛乌素沙漠区, 开采沉陷, 移动变形规律, 球心空间拟合RTK测量技术

Abstract: The ecological environment is very poor in the western area of China，and the surface movement deformation induced by coal seam mining is an important factor that weakens the ecological environment.In order to obtain the surface movement and deformation law of the coal mining in Mu Us Desert，the surface movement observation stations are built above the first mining face of a mine，and the space fitting RTK measurement technology is adopted to conduct surface movement deformation monitoring on a regular basis.Then the conclusions are obtained by analyzing the measurement data，showing as follows:①the surface deformation process is continuous gradient，and the boundary angle，movement angle and crack angle of surface movement basin are 58°，63°，79°respectively；②the surface subsidence velocity is faster than that of the similar geological conditions in the eastern area，with the maximum subsidence velocity 110 mm/d，and the maximum subsidence velocity coefficient value is 3.14；③the surface wedge appears as fracture，and most of them are located at the mining boundary and the area in front of mining area，the corner of ground fissures present the state of arc；④The distribution of surface movement deformation law can meet the model of the probability integration basically，and the parameters of probability integration model are obtained by using genetic algorithm.All the results above can provide some reference for setting all kind of protective coal pillars，pre-warning of surface subsidence and designing of the “three-under” coal mining.

Key words: Mu Us desert, Mining subsidence, Movement and deformation law, Space fitting RTK measurement technology