近距离煤层顶板稳定性分类研究

Study on stability classification of coal seam roof in close distance

为实现近距离煤层巷道顶板的稳定性分类,首先根据近距离煤层下开采顶板岩层的结构特点构建"散体—块体"力学模型,分析其顶板围岩破坏机理;然后用层次分析法对影响顶板稳定性的不同因素指标进行权重分析,将顶板划分为三类;最后经各钻孔顶板稳定性计算绘制出各煤层顶板稳定性分区图。

In order to realize stability classification of roadway roof in close distance coal seam, there were three steps needed to do. Firstly, mechanical model of ＂bulk-block＂ was constructed according to structural characteristics of roof rock stratum in close distance coal seam, and its failure mechanism of roof surrounding rock was analyzed. Then, weights of different factors affecting roof stability were analyzed through analytic hierarchy method. And the roof was divided into three categories. Finally, partition map of roof stability of various coal seams was drawn through stability calculation of each borehole roof.