综放工作面支承压力分布演化规律研究

Distribution Law of Lead Abutment Pressure in Fully Mechanized Caving Face

针对综放工作面超前支承压力无法定量描述的问题,以大采高综放面极限平衡区煤体为主要研究对象,建立了超前支承压力作用下综放面前方煤体的力学模型,应用弹塑性极限平衡理论对超前支承压力进行研究。利用FLAC3D数值模拟软件,模拟分析不同开挖距离下工作面前方支承压力演化规律,模拟分析所得支承压力值与理论分析结果趋近,为相似条件下超前支承压力分布规律的计算提供了理论基础。

Based on fully mechanized caving faces abutment pressure without quantitative description problem, large mining height fully mechanized caving faces limitation balance area coal body was taken as study object, fully mechanized caving faces forward coal body mechanical model under advanced abutment pressure was set up, advanced abutment pressure was studied by the elastoplastic limit equilibrium theory. Using FLAC^3D numerical simulation software, working face advanced abutment pressure evolution law was simulated and analyzed, simulation analysis abutment pressure value approached theoretical analysis results, which provided a theoretical basis for r advanced abutment pressure distribution law calculation under similar conditions.