Kinetic Analysis And Optimum Design Of Stope Mechanical Prop

Stope mechanical prop is a kind of equipment that be used to support the stope roof of underground metal mines. Downward mining filling method is applied in underground metal mines. At present, the wood pillars are widely used in metal mine for supporting stope roof. However, the relevant departments of the state have been banned the wood pillars and changed to another pillar due to its high cost and it can not be recovered. The hydraulic prop is widely used in the coal mine and it can be planted to the metal. However, emulsion pump, pipeline system and hydraulic control system which with complex components, high investment and high maintenance equirements need to be built when hydraulic prop is used in the metal mine. Steel pillar is inconvenience supported with high cost and can’t be recovered. Therefore, it is essential to develop a kind of simple practical can be recycled and can reused mechanical pillar to replace wood pillar and hydraulic pillar.According to the design requirements, the design scheme of the straight bevel gear drives the screw drive is selected based on the domestic and foreign literature and in-depth understanding and analysis of the stope support and the wood pillars and the hydraulic prop. Design and calculation theory is given for the screw. The three-dimensional model of the mechanical prop is built in Pro/E according to the working principle of mechanical pillars. No parts interference during the interference analysis.Mechanical pillar model is imported to ANSYS Workbench for the static analysis. Stiffness of screw meet the requirements and the maximum stress occurs at the screw’s lower end where is the most easily damaged place.The screw rod should be paid more attention in the project. In order to improve the mechanical properties of the screw, screw material is conducted the 40Cr heat treatment. Nut strength don’t meet the requirements through the analysis. Screw support tubes are made of linear buckling analysis. The mechanical pillar stability meets the requirements.Mechanical pillar are optimized design to make the optimal size of nut under strength requirements, to decrease the supporting tube material and to optimize before and after analysis. Little change in overall quality, but the optimized mechanical properties of mechanical pillar has been greatly improved, economic and reasonable. Because the support tube thinning, the optimized screw support tube is conducted stability analysis and shows that optimized screw is able to withstand more than 20% load than eucalyptus wood pillar and it is safer and more reliable than the wood pillars.A virtual prototype model is built in ADAMS when import assembly model of screw and bevel gear of the main working parts into it The tighten process, loosen process and the self-locking state of the screw mechanism is given dynamics simulation. Expected requirements is carried out and verified the correctness of the design scheme.