我国多数煤矿采区内工作面回采常采用跳采接续方式，普遍存在孤岛工作面，由于孤岛工作面存在应力集中，矿压显现较一般工作面剧烈，来压强度相比较常规工作面高，常规的巷道围岩支护技术难以控制巷道围岩变形，导致围岩应力高度集中，稳定性不能得到保障。由此亟需对巷道支护提出合理的优化方案，来确保孤岛工作面的安全和有效运行。为此本文在金凤煤矿011814孤岛工作面的基础上，采用现场调研、实验室实验、数值分析及现场实测分析等研究方法，对011814孤岛工作面的动态煤巷围岩控制进行深入探讨，得出如下研究成果：

通过孤岛工作面上覆岩层结构特征分析，构建出考虑011814孤岛工作面上覆岩层动态演化的结构模型；由实验室试验得出的力学参数，结合理论和数值模拟对不同开采阶段巷道围岩的应力分布和变形特征的分析，确定巷道开挖扰动影响区域，得到了孤岛工作面两侧支承应力降低区、应力增高区范围、巷道围岩变形量等，确定了合理的煤柱宽度，以及煤柱稳定性情况对工作面开采的影响范围大小和支护强度是否满足现场实际需要。分析了锚杆锚索支护作用机理，揭示现有工作面煤柱布置方式下煤柱塑性变化和应力集中情况及应力集中规律，最终确定锚杆锚索支护优化方案。

经过实地工业性试验和数值模拟研究对比发现支护优化效果明显，顶底板的移动量和两帮的移动量随巷道的深入，都出现先上升后减缓的趋势；顶板与帮部锚杆（索）受力增量减小，顶板增加锚索支护有效控制顶板离层，帮部围岩变形量减小，变形控制效果较好，提高了围岩稳定性。

At present, coal companies use mining hoping to reduce the pressure of mining and reduce roadway compression, but this practice still leads to the emergence of silo faces. The face will be affected by three goaves and mining activities from both sides and rear, resulting in large variations in dynamic pressure in the roadway, which does not ensure the stability of the surrounding rock. Therefore, it is necessary to propose a reasonable optimization scheme control technology for the support of the dynamic pressure roadway to ensure the safe and effective operation of the isolated working surface. Based on the isolated island face of Jinfeng 011814Coal Mine, we used a variety of research methods, including but not limited to site investigation, data search, laboratory inspection, data processing and field observation, to conduct in-depth discussions on the dynamic surrounding rock control of coal alleys in the area, and finally reached the following conclusions.

Through the analysis of the structural characteristics of the overlying rock layer on the island face, a structural model considering the dynamic evolution of the overlying rock layer on the 011814 island face is constructed. The mechanical parameters obtained by laboratory experiments, combined with the analysis of the stress distribution and deformation characteristics of roadway surrounding rock in different mining stages combined with theory and numerical simulation, determined the impact area of roadway excavation disturbance, obtained the supporting stress reduction zone, stress increase zone range, roadway surrounding rock deformation on both sides of the island face, and determined whether the reasonable width of the coal column, as well as whether the influence range and support strength of the coal column stability on the mining of the working face meet the actual needs of the site. The mechanism of anchor support of the anchor cable was analyzed, the plastic changes, stress concentration and stress concentration of the coal column under the layout of the existing working face coal column were revealed, and the optimization scheme of the anchor cable support of the anchor was finally determined.

After field industrial experiments and numerical simulation studies, it is found that the support optimization effect is obvious, and the movement of the top and bottom plates and the movement of the two gangs show a trend of first rising and then slowing down with the deepening of the roadway. The force increment between the roof plate and the bolt (cable) of the top plate decreases, and the addition of anchor cable support to the roof plate effectively controls the roof plate separation, the deformation of the surrounding rock of the gang is reduced, the deformation control effect is better, and the stability of the surrounding rock is improved.