This paper seeks to delve into the stress characteristics behind different mining height stope by analyzing the characteristics behind the distribution of plastic zone and the stress distribution of coal in different mining height units using FLAC3D numerical simulation software.The research demonstrates that along with the increase in mining height comes an increasingly larger range of plastic damage around the stope, resulting in the peak position of abutment pressure being transferred to the deeper part of coal seam and thus producing an increase in the effect scope of abutment pressure;and an increase in mining height is followed by an increase in the probability of coal wall spalling and the depth film.The study points to the conclusion that the peak position of abutment pressure is the dividing line between plastic zone and elastic zone of coal seam.%为了研究不同采高采场受力特征,采用FLAC3D数值模拟软件分析不同采高单元体塑性区分布特征、煤体应力分布特征.结果表明:随着采高增加,采场周围出现塑性破坏的范围越来越大,超前支撑压力峰值位置向煤层深部转移,支撑压力影响范围逐渐增大.随着采高增加,煤壁发生片帮的概率和片帮深度增大,故支承压力峰值位置即是煤层的塑性区与弹性区分界点.
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