鄂尔多斯东胜煤田为侏罗系含煤地层，诸多深部矿区2-2煤层和3-1煤层全区可采，并且煤层间距较小。以营盘壕煤矿为地质原型，通过FLAC^3D和UDEC数值模拟软件构建研究区域数值模型，围绕2-2煤层和3-1煤层开采引起的地表移动变形及应力场演化规律进行研究。结果表明：多煤层重复采动将引起沉陷盆地中心投影向下煤层采空区方向移动，进而逼近煤层初采中心投影，并最终越过之；两煤层连续开采后，地表最大下沉值小于两煤层单独开采最大下沉值之和，煤层复采下沉系数小于初采下沉系数；煤柱错距与地表移动参数关联密切，错距系数与地表下沉系数、水平移动系数和主要影响角正切分别呈对数正态函数、凹抛物线和凸抛物线函数关系，并且与宽深比作为共同因子对煤层初采及复采表征参数的比值产生耦合影响；另外，同时随着错距的增大，地表沉陷盆地范围先减小后增大的趋势发展，水平移动近盆地等值线由椭圆形向梭子形演化；综合卸压错距经验公式、地表损伤程度及煤柱卸压效果确定的研究区域多煤层开采最优错距为30 m。

The Dongsheng Coalfield in Ordos is a Jurassic coal bearing formation, and the 2-2 and 3-1 coal seams in many deep mining areas can be mined in the whole area, and the spacing of coal seams is small. This paper takes Yingpanhao Coal Mine as a geological prototype, and constructs a numerical model of the research area through FLAC^3D and UDEC numerical simulation software to study the surface movement deformation and the evolution law of stress field caused by mining coal seams 2-2 and 3-1. The results show that repeated mining in multiple coal seams will cause the central projection of the subsidence basin to move toward the direction of lower coal seam, and then approach the central projection of the initial mining of the upper coal seam, and ultimately cross it; after the two coal seams were continuously mined, the maximum subsidence value of the surface is less than the sum of the maximum subsidence values caused by mining the two coal seams separately, and the subsidence coefficient of the coal seam repeated mining is less than the initial mining subsidence coefficient; coal pillar dislocation is closely related to surface movement parameters, the staggered coefficient is related to the surface subsidence coefficient, horizontal movement coefficient, and the tangent of the main influencing angle in a logarithmic normal function, concave parabolic function, and convex parabolic function, respectively; as common factors, pillar staggered distance and width-depth ratio have coupling effects on the ratio of characteristic parameters of primary mining and repeated mining in coal seam; in addition, with the increase of pillar staggered distance, the surface subsidence basin area decreases first and then increases, and the contours of horizontal movement near the basin evolve from ellipse to shuttle; the optimal staggered distance of multi-coal seam mining in this study area is 30 m based on the empirical formula of pressure relief distance, the surface damage degree and the relief effect of staggered mining.