大倾角煤层长壁采场倾斜砌体结构与支架稳定性分析

大倾角煤层覆岩变形、破坏和运移规律复杂，采场顶板倾斜砌体结构对支架稳定性影响大，大量的现场实践、实验研究和理论分析表明，倾斜砌体结构与支架的相互作用可分为正压、倾向挤压、反倾向挤压、后推和走向挤压型，其易造成支架发生挤压型失稳、下滑失稳、倾倒失稳，建立了支架-顶板接触力学模型，基于基础动力学、“R-S-F”动力学控制理论分析了大倾角煤层长壁采场覆岩特有的结构形式倾斜砌体结构与支架在不同状态下的稳定性，并给出了其动力学方程和“支架-围岩”稳定性判定条件。

Stability analysis of incline masonry structure and support around longwall mining face area in steeply dipping seam

The reaction of overburden structure and support surrounding rock system in steeply dipping seam mining is very different from that in flat or moderately pitched coal seam mining.Numerous past practices，experimental research and theoretic analysis indicate that the interaction between support and incline masonry structure can be divided into several patterns，such as uprightness pressing，inclination pushing，anti inclination pushing，back pushing and strike pushing，which cause extrusion instability，glide instability and dumping instability of supports easily.Then the support roof contact mechanical model was founded.Based on the dynamic theory and R-S-F dynamic control theory，the different kinds of the stabilities between support and incline masonry structure were analyzed at different situation，and the dynamic equation and “rock support” stability determinant condition were concluded.