Strength Check Method For Coal-Caving Hydraulic Support And Development Of Software Toolkit

Coal-caving hydraulic support has been widely used at present as its strong adaptability and good result in many conditions. But hydraulic support demands high security because the working conditions are very complex underground, then we must ensure the strength of the structures when we design them. This paper focuses on the checking model for the strength of hydraulic support and the complexity of computing. In order to check the strength of the hydraulic support, a checking model that is suit for strength check was introduced, and was written into software.First of all, based on analyzing the structure and the stress state and damaged state of hydraulic support, the dangerous section was confirmed according to the stress state and working condition.Then, summarized all kinds of strength check method and found a suitable method in line with the characteristic of the dangerous section. Tested and verified the accuracy of this method.On the basis of the strength check method, a kind of software that was used for strength check was written. This software could draw parametric graphic section easily and store the graphic and timely display. It could calculate and display the stress state of every part of the section after the users input the force.At last, calculation examples ware done to test and verify the accuracy of this software according to the data provided by Zhengzhou coal mine machinery factory.