Study on plate group mechanical model for main roof of longwall face

Based on the local, migratory and subsection characteristics of main roof fall of longwall face, the main roof was divided into some plate group, and plate group mechanical model was established. The stress distribution of plate under some bearing conditions was obtained by using elastic plate theory and numerical simulation. It interpreted the characteristic of main roof fall along the longwall face, which is well agreeable with the main roof fall of Silaogou Coal Mine.