摘要
本文根据材料损伤本构关系 ,用大煤样三维压裂实验、现场顶煤变形观测和有限元数值分析 ,求得损伤变量、损伤系数、煤体常数与煤体压裂强度和开采深度的关系 ,以及损伤变量随工作面推进的变化关系 ,文章结论是 :实验所得损伤参数变化规律是可信的 ,损伤变量 D随工作面的推进呈指数函数变化 。
According to material damage characteristic relation, the relation between the damage variation, damage coefficient, coal mass constant and the fracture strength of coal mass, mining depth and change relation of damage variation in advance process of working face are obtained by three dimension fracture test of big coal sample, top coal deformation observe in working face and finite element numeral analysis. The conclusions show that the change law of damage parameters is reliable. Change of damage variation D is exponential function in advance process of working face. This law is important significance to forecast abutment pressure distribution and top coal caving feature.
出处
《矿山压力与顶板管理》
EI
北大核心
2002年第1期9-11,8,共4页
Ground Pressure and Strata Control
基金
国家自然科学基金重点项目资助 (5 973 40 90 )
