柔模流体充填留巷技术是在利用风积砂流体充填采空区的同时，通过设置巷道侧向支挡结构，保留进入巷道，为下一工作面服务。该技术属于无煤柱开采技术，是我国煤矿科技方面取得的又一重大创新成果，具有巨大的技术和经济优势，值得推广。研究柔模流体充填留巷围岩的稳定性对减少巷道掘进量、进一步提高煤炭采出率具有重要意义。本文以榆阳煤矿2307流体充填留巷工作面为背景，采用理论分析、室内试验、数值模拟等综合研究手段，主要结论如下： （1）在分析柔模流体充填采煤及充填留巷工艺的基础上，对充填材料力学特性的影响因素进行试验研究，得到风积砂含量对充填体7d强度影响显著，粉煤灰细度对充填体28d强度影响显著，同时柔模作用下能够提高充填体强度及弹性模量。 （2）根据流体充填留巷覆岩仅弯曲下沉而无破断的规律，建立了流体充填留巷力学模型，分别求出顶板下沉量、煤帮竖向应力峰值的解析方程式，并得到了不同因素条件下顶板下沉量的影响曲线，同时分析了巷旁充填体的稳定性，确定出了充填体地基系数km、强度及欠接顶量U为充填留巷稳定性的控制因素。 （3）通过对柔模流体充填留巷进行的三维数值模拟结果进行分析，得到了不同充填体强度和不同充填率条件下充填留巷围岩应力分布、塑性区分布及变形量变化的特征，分析得到充填体强度越小，充填留巷顶底板移近量越大，确定充填体强度应大于等于4MPa；充填率越小，留巷围岩变形量越小，并确定充填率应大于等于95%。 （4）结合榆阳煤矿2307流体充填留巷现场试验，充填体28d强度为4MPa，弹性模量为1.26GPa，充实率达到95%以上，巷内采用锚网索支护，通过对现场监测数据进行整理和分析可知，柔模流体充填留巷围岩结构稳定，满足要求。

Technology of gob-side entry retaining at flexible formwork fluid backfilling minning is used by aeolian sand fluid to fill mined-out area at the same time, by setting the roadway of lateral retaining structure, reserve into the roadway, service for the next working face. It is the part of mining technology without pillar and a major innovation achievements on Chinese coal mining technology, has great technical and economic advantages and worth to promot. Surrounding rock stability research of Gob-side Entry Retaining at flexible formwork fluid backfilling mining is great significance for improving the coal recovery rate and reducing drivage rate of roadway and also inevitable choice for backfilling mining. Taking gob-side entry retaining of fluid backfilling at 2307 in Yuyang coal mine as the background,it based on the theoretical analysis, laboratory test, numerical simulation and other comprehensive research methods and the main conclusions are as follows： (1) Based on the analysis of flexible formwork fluid backfilling mining and procession of gob-side entry retaining, experimental research on the impact of backfilling material components and flexible formwork to physical properties of backfill， the conclusion is that the ratio of fly ash and cement has the greatest effect in strength and elastic modulus of backfill ，and mass fraction of fine grained coal gangue has a greater influence on elastic modulus of backfill ，at the same time accessories content has a greater influence on the material content on the strength of backfill. (2)Based on the rules of the overlying rock movement of the gob-side entry retaining of fluid backfilling with thick coal seam is that: overburden to entity coal for anchoring,the overlying rock bend sinking slowly, without breaking. The mechanical model of gob-side entry retaining of fluid backfilling is set up and then the analytical solutions of roof subsidence and filling pressure and the subsidence curve of different factors on the roof are obtained respectively. it also obtained the support resistance of bolt under bolting support coal side. At the same time it studies the reasonable width and the effect mechanism of the gateside pack, and determined stability of the control factors to the elastic modulus of filling E0, intensity and the amount owed to meet top U . (3)By 3D numerical modeling of gob-side entry retaining of fluid backfilling and it got stress distribution law of stope and changes of surrounding rock stress and plastic zone with the increase of backfill length. Meanwhile it obtained curve of roadway deformation that impacted by strength of backfill and the rate of supporting pit roof. (4)Combined with 2307 backfill working face at YuYang coal， backfill strength is determined to 4MPa and its Modulus of elasticity is 1.26GPa for the 28d and the rate of supporting pit roof is more than 95%， meanwhile， cable anchor supported in mine gateway， so that the stability structure of surrounding rock is well and meet the requirements though on-site monitoring data collation and analysis.