Dynamics Mechanism Study And Seismic Analysis Of Mine Derrick Under The Macroseismic Condition

Mining derrick is installed in the wellhead while coal or metal mining using shaft mining, and takes the function of lifting people、putting equipment、material and mineral structures,with hoist together, after accident, it takes the role of disaster relief and construction. It has the assignable significance of ensuring the safety of the mining steel headframe for ensuring the safety of people and reducing the earthquake damage. For building safe and efficient mine and ensuring the safety of the mine, there are great practical significance of carrying out the design method of anti-seismic of mining derrick. However, at present, it mainly focuses on the theory design for the study of steel headframe, few scholars research on anti-seismic of structure of derrick.Based on the correlation analysis of seism of the double brace steel headframe seismic, this article discussed its dynamic characteristics and anti-seismic mechanism, and provided some reference and suggestions for the engineering design. In this paper, research work mainly as follows:Summarizes the research aspects of steel derrick seismic profiles,status, problems and development direction of the stage.Introduced the steel derrick structure theory, by comparison, select ANSYS software as a computational analysis software.In order to facilitate subsequent calculations, the structure of the model derrick simplified. Derrick structure for static analysis, analysis of its normal production conditions, statics, smaller stress calculation results, the problem does not appear damaged.In order to facilitate subsequent calculations, the structure of the model derrick simplified. Derrick structure for static analysis, analysis of its normal production conditions, statics, smaller stress calculation results, the problem does not appear damaged.Derrick structure for modal analysis, to find its natural frequencies for the subsequent response spectra and time history analysis to lay the foundation to get the natural frequency of1.468Hz. This process can dynamically observe the order of freedom vibration intuitively.Response spectrum analysis, examine the theoretical spectrum derrick structure in case of earthquake situation. Stress and displacement results obtained are small, derrick structure is not damaged.Time-history analysis, according to Derrick location environment conditions, select EL Centro and Taft as analog seismic waves, and local adjustment according to the actual site requirements; obtained after the derrick structure of the input seismic waves in each direction of displacement various schedules stress situation, derrick seismic results obtained, the structure of the two waves of displacement obtained basic agreement, the largest displacement in the Y direction, maximum small will not cause damage to the derrick structure, its conclusions can be made for future reference derrick vibration test.The results can provide recommendations on the derrick structure design and reference, has some practical engineering applications, provide a theoretical basis for future reference seismic research derrick structure.