薄基岩梯度复合板模型与单一关键层解算

Resolving of thin base rock-gradient layer composite board and single key stratum

依据典型薄基岩浅埋煤层覆岩结构及其力学特征,建立薄基岩浅埋煤层覆岩力学模型,弹性基础上的梯度复合板模型,梯度复合板由组成薄基岩的所有分层组成,各层力学参数取对应分层参数,其力学性质沿厚度方向变化,满足τjmax<crj的相邻界面的相邻几个岩层分层,共同组成薄基岩的关键层。利用傅里叶变换确定单一关键层位置及组成岩层分层,为浅埋煤层开采顶板活动预测及其控制、浅埋煤层开采方法及其工艺参数的提供理论依据,具有重要的理论及其实际意义。

The gradient layer composite board mechanical model of thin base rock shallow seam is advanced in this paper based on the rock structure and mechanical character of the roof. The gradient layer composite board is constituted by all the layers of thin base rock, and the mechanical parameters correspond with the layer, the mechanical character varieties along the thickness direction, and key stratum is composed with the adjacent layers where τjmax〈Crj is satisfied. The position and the layers of the rock of the single key stratum are confirmed using fourier transform, the results can provide theoretical base for roof movement and control and mining method and technical parameters of shallow seam mining. It has important theoretical and practical significance.