随着煤矿开采高效集约化发展，无煤柱沿空留巷技术得到了广泛的应用，柔模混凝土支护技术有利于解决无煤柱护巷巷旁支护阻力低、可缩性差、密闭性差以及后期维护等问题，对于大采高工作面无煤柱开采具有重要意义。 论文采用理论研究、数值模拟、实验分析和工程应用等方法，对金凤煤矿深部大采高沿空留巷技术进行了研究，结果表明： （1）大采高沿空留巷围岩变形速度和强度主要受综采工作面推进距离和回采动压影响，沿空留巷宽度和强度是决定围岩应力分布重要因素。沿空留巷补强和巷旁支护设计主要控制上覆岩层的前期运动，最大支护载荷主要控制顶板后期活动。 （2）大采高工作面沿空留巷采用“锚、网、索、喷”支护，超前补强采用“一梁三柱”套棚和钢带支护；巷旁采用“架前铺网+悬梁π型钢梁+柔模混凝土墙体+木点柱”联合支护，柔模混凝土（模板规格：长×宽×高=3m×1m×3.5m），配合比为水泥:砂:碎石:水:粉煤灰:外加剂=1:1.77:1.88:0.50:0.31:0.003，强度为C25；滞后补强采用“一梁三柱”套棚和木垛支护。 （3）大采高工作面沿空留巷柔模混凝土墙体具有早期激增阻特性和较高抗压强度；巷道围岩变形呈现三个阶段特征：围岩初始小变形阶段（0-15m），顶板比较稳定；围岩变化剧烈阶段（15-35m），墙体和巷道围岩载荷增长较快，顶板变形剧烈；围岩变化趋于稳定阶段（50m以后），墙体和巷道围岩载荷趋于平稳。 论文研究成果在金凤煤矿011805工作面获得了成功应用，并创造了良好的技术经济效益。

With the intensive development of coal mining, the technology of retaining roadway without coal pillars has been widely applied. The flexible mould concrete support technology is helpful to solve the low support resistance, poor shrinkage, poor airtightness and difficult maintanance in the later stage of the roadway without coal pillars, which is of great significance for the coal mining without large coal mining face. The paper uses the comprehensive research methods such as experimental test, theoretical analysis, numerical simulation and on-site industrial test to carry out a systematic study on the gob-side entry retaining of large mining height technology in Jinfeng Coal Mine. The main research results are as follows: (1)The deformation speed and strength of surrounding rock in gob-side entry of large mining height are mainly affected by the advance distance and mining dynamic pressure of fully mechanized working face.The width and intensity of the roadway are important factors determining the stress distribution of the surrounding rock. The maximum support load of the design gob-side entryretaining is mainly based on the law of the front stage movement, and the maximum support deformation of the design roadway along the main road is mainly based on the late stage activity of the roof. (2)The gob-side entryretaining of large mining height working face adopts "anchor, net, cable, spray" support and advanced reinforcement support adopts "one beam and three columns” shed and steel belt; the roadside support adopts "the front netting + cantilever π-type steel beam + flexible mould concrete wall + wooden point column"combined support. The flexible formwork concrete (specification: length×width×height=3m×1m×3.5m), and the concrete mix ratio is cement: sand: gravel: water: fly ash: admixture = 1: 1.77: 1.88: 0.50: 0.31: 0.003; The concrete strength is C25; Lagging reinforcement support adopts "one beam, three columns" shed and wood stack support. (3)Flexible mould concrete wall of gob-side entryretaining of the large mining face has early surge resistance and higher compressive strength.The three stages of surrounding rock deformation are: initial small deformation stage of surrounding rock (0-15m); severe stage of surrounding rock change (15-35m); surrounding rock changes stage that is tend to stabilize (after 50m). Therefore, when the working face is 15-30m after mining, it is necessary to strengthen the roof reinforcement and temporary support, which is conducive to maintain the stability of the roof. The research results of the thesis have been successfully applied in the 011805 working face in Jinfeng Coal Mine, and have created good social and technical economic benefits.