为解决综放工作面端头不放煤导致顶煤遗失的问题，以淮北矿业集团袁店一井煤矿为研究对象建立了二维数值模型，分析了端头放煤过程中煤岩体位移场及力链场的动态变化特征，提出了端头安全放煤区段划分方法和精准放煤方案，并针对放煤空间不足的问题设计了支架改造方案。研究表明：①巷道锚杆(索)的主动支护作用在放煤前受工作面中部放煤影响逐渐失效，但上、下端头的主动支护作用失效具有时空性差异。②放煤过程中，上、下端头煤岩体流动规律显著不同。上端头煤岩体承载结构受中部放煤影响产生超前松动，超前影响范围与工作面倾角呈正比；下端头承载结构的煤岩体随放煤架数增多逐渐松动，承载能力逐步减弱。③端头放煤区间范围对承载结构稳定性影响显著，为保持承载稳定，应采取下端头整体分区、上端头架内分段的放煤方案。

To address the significant of top coal loss due to the absence of coal drawing at the end of fully mechanized top-coal caving faces, this study established a two-dimensional numerical model with the Yuandian No. 1 Mine of Huaibei Mining Group as an example for analysis. Specifically, we analyzed the dynamic variations and characteristics of the displacement field and force chain field of the coal-rock mass during the end coal drawing process. We proposed methods for safe coal drawing section division and precise coal drawing schemes. Additionally, we put forward a support modification scheme in response to the insufficient existing coal drawing space at the end. Results show that: ①The active support of the anchor (cable) in the roadway fails successively before the formal coal drawing at the end area, due to the influence of the coal drawing in the middle of the working face. However, there are temporal and spatial differences in the failure of the active support effect of the anchor (cable) at the upper and lower end roadways. ② The flow of the coal-rock mass demonstrate significant differences in at the upper and lower ends of the working face during the end coal drawing process. The coal-rock mass in the bearing structure around the lower end roadway gradually loosens with the increase in the number of transition supports, leading to a gradual weakening of bearing capacity. The coal-rock mass in the bearing structure around the upper end roadway experiences advanced loosening due to the influence of coal drawing in the middle of the working face, with the advanced influence distance being proportional to the dip angle of the working face. The coal-rock mass within the advanced influence range will also gradually loosen and eventually penetrate. ③The sectional range of the end coal drawing area has a significant impact on the bearing capacity of the surrounding roadway structure. To maintain the stability of the bearing structure, the end coal drawing scheme for the working face can be set as: overall partitioning at the lower end and segmented partitioning within the support at the upper end.