大倾角厚煤层大采高工作面开采难度大，覆岩变形、破坏和运移规律复杂，影响支架稳定性因素众多。回采过程中，工作面支架失稳更为复杂，严重制约工作面安全高效生产，研究大倾角大采高工作面支架稳定性对此类工作面安全高效开采具有重要的理论意义及实际价值。 论文采用数值计算、物理相似模拟、理论分析方法，对新疆焦煤集团2130煤矿 25221大倾角大采高综采工作面覆岩运移破坏特征、应力分布特征及支架稳定性进行了较为系统的研究，结果表明： （1）大倾角条件下大采高采场较一般采高采场顶板应力释放区较大且充分。围岩运移范围及运移量大，应力不均衡现象明显；中上部区域支架受载不均衡，部分载荷较小或为零，使“支架-围岩”系统元素缺失；顶板位移分布不均匀，支架顶梁具有向倾斜下方运移趋势，底座具有向倾斜上方运移趋势，中上部支架较下部运移特征明显，使该区域支架工作特性不能正常发挥，易导致“支架-围岩”系统失稳。 （2）大倾角条件下大采高采场比一般采高采场覆岩垮落高度大，形成非对称充填带，中上部区域由于未充填空间较大，垮落岩层形成类似“马鞍”形态，工作面中部区域不能形成完全充填，矿压显现表现为周期来压明显。中上部区域顶板垮落后对工作面支架具有一定的冲击，不利于支架稳定。 （3）大采高支架重心较高，其结构稳定性较差，影响支架稳定性主要的因素重要度为工作面倾角、开采高度、支架工作阻力。伪斜开采、规范移架、控制采高、提高初撑力可以提高工作面液压支架的稳定性。 （4）现场工程实践与应用表明,工作面中上部区域液压支架工作阻力较大，其次为下部区域，支架载荷分布频率呈正态分布。大部分支架初撑力占额定阻力80%，满足支护需求，支架总体位态较好，有利于支架的稳定。 论文相关研究结果与实验室实验、理论分析结果相一致，现场应用效果良好，可为类似条件工作面安全高效生产提供参考。

Affected by the variation of seam dip angle, strata movement and gangue filling was complex in fully mechanized caving workingface in steeply dipping seam, resulting that it is difficult to achieve efficient production with conventional caving technology and difficult to achieve security management inthe fully mechanized working face with large mining height. In order to control thes tability of support in large mining height workingface in steeply dipping seam, it has high theoretical and practical value in the research of the lawof overlying strata and top coal deformation, destruction and migration. By using physical simulation experiment, numerical analysis and field monitoring methods to study the law of overlying strata and top coal deformation, destruction and migration ,the time distribution of apparent stress and strata behaviors incaving workingface in steeply dipping seam in workingface 25221 of mine 2130 , results show that: (1) In steeply dipping seam, compare with general mining height the stress of large mining hight releasing zone of roof is larger, and the movement of overlying strata is also larger than the normal working face. There are uneven stresses in the working face. Especially in the middle region and the upper region. Partial support is small or zero lead to “ support-surrounding rock” system element is missing. Roof displacement uneven distribution resulting supprot’s beam in downward trend and support’s base in upward trend. In the upper region of supportor than the lower region of the obvious characteristics of movement of the carriage, Support working properties can not function properly lead to "support- surrounding rock" system instability. (2) As larger overburden falling height, there is a symmetric filling zone appeared. The body of falling over burden was resemble “saddle” shape. There is a large space for filling in the middleregion. The periodical weighting is obvious, the working resistance is large. In the upper region of the roof caving working face supportor with impact, It is not conducive to support stability. (3) The large mining height support has the higher center, structural stability is poor. Important degree of the main factors of influence support stability are workingface angle, mining height, support working resistance. False-inclined mining, standardized move the supports, cutting height control, increase the setting load and other facilities can ensure the stability of the hydraulic support. (4) Field engineering practice and application shows that working resistance was bigger in the upper region than the lower region of working face, and the distribution of support load is reasonable and show normal distribution. Mostly, the support resistance was about 80% of rated resistance, and benefit to the stability of support. The paper related research results with the experiment , theoretical analysis’ sesults are consistent. Field applicationeffect is good and well applied, can provide reference for the similar condition working face production safety.