综放工作面不同放煤工序岩体破断机理及数值模拟研究

Study on rock fracture mechanism and numerical simulation of different caving processes in fully mechanized top coal caving face

本文建立了综放工作面顺序放煤和间隔放煤的力学理论模型,并根据该模型,在数值模拟软件中建立有限元模型进行力学分析,研究了煤层厚度为7m条件下不同放煤工序对工作面上方围岩的影响,结果表明,采用顺序放煤工序的围岩力学条件优于间隔放煤工序,因此建议采用顺序放煤工序。

In this paper,the mechanical theory model of sequential and interval caving in fully mechanized top coal caving face is established,according to the model,the finite element model is established in the numerical simulation software for mechanical analysis,the influence of different coal drawing procedures on surrounding rock above the working face was studied when the thickness of coal seam was 7m,the results show that the mechanical condition of surrounding rock of sequential drawing is better than that of interval drawing,therefore,it is suggested to adopt sequential coal drawing process.