Based on the measured data of Inner Mongolia Shuangxin Mining Co. , Ltd. , using mining subsidence theory, numerical simulation, and other methods, the law and parameters of surface movement in shallow and multi-seam coal mining were studied. The observation data of surface movement under different conditions such as initial mining of upper coal and repeated mining of lower coal are summarized and analyzed. The results show that the initial period and active period of surface movement are relatively short, with the initial period of surface movement being about 0. 5 months and the active period generally being 3~6 months; due to the activation effect of the old goaf, the surface subsidence coefficient and the tangent of the main influencing angle significantly increase during the mining of the lower coal seam. The activation coefficient of the old goaf in the shallow and multi-seam mining can be taken as 0. 045~0. 13; the damage of the overburden mainly includes shear damage and tensile damage. The surface is prone to discontinuous deformation such as ground fissures, and forms a wavy subsidence basin on the surface.
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