中文摘要：

针对兖州矿区某矿提高开采上限的问题，运用现场钻孔原位窥视镜成像方法，对该矿5301-1工作面第一分层开采完毕后导水断裂带的空间发育特征及发育高度进行观测，并结合经验公式计算结果进行了对比分析。在对该工作面的煤层顶底板岩层组合及结构性质特点进行分析的基础上，建立工程地质模型，运用FLAC3D数值模拟方法对其进行验证。3种方法研究得到的导水断裂带高度基本一致：实测结果为24.2 m，经验公式计算结果为26.7 m，数值模拟结果为25.0 m。研究结果可为该工作面提高开采上限煤柱的合理留设提供重要的参考依据。

英文摘要：

To counter the Problem of increasing the mining uPPer limit in a certain mine in Yanzhou Coal Mining Area, observation was carried out on the sPace develoPment characteristics and height of the water flowing fractured zone after the mining of the first slice of 5301-1 working face by using the site borehole in-situ sight-glass imaging method,and comParative analysis was made according to the calculated results with the emPirical formula. Based on the analysis of the structure and ProPerties of the roof and floor rock strata of the coal seam in this working face,an engineering geological model was established and then verified by using FLAC3D numerical simulation method. The height of the water flowing fractured zone which was obtained with three research methods was basically identical：the actually measured result was 24. 2 m,the result obtained with the emPirical formulae was 26. 7 m and the result obtained by numerical simulation was 25. 0 m. These research results Provided an imPortant reference for the reasonable retaining of the waterProof coal Pillar after the mining uPPer limit of this coal face was increased.