BASIC STRUCTURE FORMS OF MAIN ROOF
老顶的基本结构形式

Based on the results of field observation, experiment and practical engineering, this paper discusses the main roof structure forms from the angles of roof control and loading prediction. The main conclusions are as follows:1. The structure forms of main roof vary with the qualities of rock masses.2. The main roof has three basic structure forms: dynamic arch, arch-beam and beam.3. The movement rules, abutment manefestation and control rules of the three forms are different.The results of this paper are successfully applied in Roof Control Expert System and Loading Prediction Expert System.