摘要
本文针对倾斜煤层老顶岩层刚度各向异性的特点,采用正交梁模型分析老顶初次来压步距的构成、变化规律及计算方法,并论证了其结果较弹性薄板的精确解更接近实际。
In the light of that the rigidity of the main roof strata of a longwall face in inclined seam is anisotropical,the constitution, variation and calculation method of thefirst weighting rate of the main roof are analysed with theorthogonal beam model. And the deviation of theorthogonal beam solution for weighting rate is 0-10.19% from the accurate solution. It is less than that ofthe elastic plate solution. This paper points out that theweighting rate of the main roof depends on the cardinalnumber of the rate and on the coefficient of the rateconsisted of face length, mining boundary conditions anddip angle. These three factors influence the rateremarkably in certain extent. Again the calculatingmethod for weighting rate of the main roof in the seamswith dip angles over 1O°is given.
出处
《矿山压力与顶板管理》
1992年第1期56-61,102-104,共6页
Ground Pressure and Strata Control
