长壁工作面顶板周期下沉量的理论分析与实测研究

Theoretical analysis and experimental study on the cycle subsidence of roof in long wall face

为了研究长壁工作面顶板周期下沉量对支架支撑高度的影响,本文以某长壁工作面为背景,利用数值模拟和理论分析方法,通过分析长壁工作面上覆岩层运动规律,对浅埋深长壁工作面顶板破坏特征进行研究,并对顶板所成结构形式进行了探讨,分析了顶板周期下沉量对支架支撑高度的影响,最后通过现场实测数据对所得结论进行了验证。研究结果表明,顶板最大周期下沉量对于确定工作面采高及支架最小可缩量具有重要意义。本文的研究结论对浅埋深长壁工作面顶板结构形式也提出了新的探讨。

In order to understand the movement characteristics and the structure of roof at longwall face,the deformation characteristics and the structure of roof at longwall face were investigated using numerical simulation and theoretical analysis.The results show that the bearing structure in the overburden strata can still be formed under a shallow buried depth and the structure can protect the support.The conclusion was verified through the observation data.The paper presents the new findings for the roof structure and movement characteristics at longwall face with a shallow depth.