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本文将长壁工作面老顶岩层视为支承于Winkler弹性基础上的Kirchhoff板,根据现场实测与相似材料模拟试验结果,设计了研究老顶破断的FEAEBP计算机模拟方法。这种模拟方法能够有效的模拟各种岩性参数,各种开采边界条件,以及各种几何尺寸的老顶岩层,在开采过程中破断的开始、发展和结果。同时,由于把老顶与支承它的直接顶、煤体视为一个力学体系,因此能够深入研究它们之间的相互作用与影响。 通过模拟实测,本文重点介绍了老顶破断线分布的特征,提出了Winkler弹性基础Kirchhoff板力学模型的主要力学参数Ek比对破断线分布的影响,由此探讨了老顶破断的控制途径。
In this paper, the old top rock of longwall face is regarded as Kirchhoff plate supported by Winkler elasticity. According to the results of on-site measurements and similar material simulation, a FEAEBP computer simulation method for studying the failure of old roof is designed. This simulation method can effectively simulate a variety of lithological parameters, a variety of mining boundary conditions, as well as a variety of geometric size of the old roof rock, broken in the mining process started, development and results. At the same time, since the old roof and the direct roof supporting it, the coal body is regarded as a mechanical system, the interaction and influence between them can be further studied. In this paper, we mainly introduce the characteristics of broken roof distribution in old roof, and propose the influence of the main mechanical parameters Ek of Winkler elastic foundation Kirchhoff plate mechanics model on the distribution of broken lines.