东胜煤田是我国西北部能源供给的重要基地，煤炭资源丰富但赋煤条件多变，导致不同矿区采动导水裂隙的发育存在显著差异；研究揭示东胜煤田采动导水裂隙发育的分区特征对于科学指导区域煤炭绿色高效开发具有重要意义。基于东胜煤田17对主力矿井30个工作面的导水裂隙发育特征统计与实测，获得了赋煤条件变化对导水裂隙带高度(简称“导高”)的影响规律；通过对东胜煤田赋煤条件的典型分区，提出了不同分区覆岩“导高”的预计方法。结果表明，相比深部开采，浅部煤层采动引起的覆岩“导高”波动程度更为显著，尤其在埋深200～300 m，裂采比上下波动范围可达2.55倍。覆岩导水裂隙的发育受控于关键层的破断运动，顶板7～10倍采高范围之外最近一层关键层底界即为导水裂隙发育的顶界；据此合理解释了浅/深埋煤层“导高”波动性差异的原因。浅埋煤层覆岩关键层数量相对偏少，极易出现主关键层进入7～10倍采高范围的情况，造成导水裂隙直接发育至基岩顶界，引起“导高”值的异常大幅度波动。而对于深部煤层，覆岩7～10倍采高范围之外关键层数量相对偏多、间距偏小，当因地质条件改变而引起关键层位置变化时，“导高”的波动范围仅限于7～10倍采高范围附近关键层与其上部相邻关键层之间的间距，难以出现“导高”的大幅度波动现象。据此提出，在埋深低于500 m条件不能直接使用采高倍数法进行“导高”预计，应根据关键层位置及其对破断裂缝导水性影响规律进行判断；而当埋深超500 m时，可按17～24倍采高的统计值进行简单估算。

Dongsheng Coalfield is an important base of energy supply in Northwest China. It is rich in coal resources, but the coal bearing conditions are changeable, resulting in significant differences in the development of mining induced water-conducted fractures in different mining areas. Revealing the zoning characteristics of mining water-conducted fractures development in Dongsheng Coalfield is of great significance for scientifically guiding the green and efficient mining. Based on the statistics and measurement of the development characteristics of water-conducted fractures in 30 working faces of 17 main mines, the influence law of the change of coal mining conditions on the height of water-conducted fracture zone (HWFZ) is obtained. Under the typical zoning of coal conditions in Dongsheng Coalfield, the prediction method of overburden HWFZ in different zoning is put forward. The results show that compared with deep mining, the fluctuation degree of HWFZ shallow coal mining is more significant, especially in the buried depth range of 200-300 m, the fluctuation range of fracture mining ratio can reach 2.55 times. The development of water-conducted fractures is controlled by the breaking movement of key strata (KS). The bottom boundary of the nearest KS outside the range of 7-10 times the mining height above the coal is the top boundary of water-conducted fractures. Therefore, the reason for the fluctuation difference of HWFZ in shallow or deep coal seam is reasonably explained. The number of overburden KS in shallow coal seam is relatively small, and it is very easy for the primary key stratum (PKS) to enter the range of 7-10 times the mining height, resulting in the direct development of water-conducted fractures to the top boundary of bedrock, resulting in abnormal large-scale fluctuation of HWFZ. But for deep coal seams, the number of KS outside the mining height range of 7-10 times of overburden is relatively large and the spacing is relatively small. When the position of KS changes, the fluctuation range of HWFZ is limited to the spacing between the KS near the mining height range of 7-10 times and its upper adjacent KS, so it is difficult to have a large fluctuation phenomenon of HWFZ. Therefore, it is proposed that when the buried depth is less than 500 m, the HWFZ can not be predicted directly by the mining height, and it should be judged according to the position of KS and its influence on the hydraulic conductivity of the broken fracture. When the buried depth exceeds 500 m, it can be simply estimated according to the statistical value of 17-24 times the mining height.