| With the depletion of shallow coal resources in China, the mining depth is becoming increasing. In deep high stress environment, the tunnel deformation has become one of the bottlenecks in deep engineering safety. Fix problems of deep soft rock tunnel deformation has become a hot outside research. The current tunnel repair jobs still rely mainly on manual labor, not only inefficient, but also large labor intensity, and there is a big security risk. The Underground Coal Mine Tunnel Repairing Machine is a convenient type of equipment, mainly for tunnel bottom cleaning, cleaning, digging ditches, tunnel expansion, materials lifting and transportation work. This thesis combines the results of previous researchers on tunnel repairing machine and practical requirements to do the research, and the main research contents are as follows:(1) The Underground Coal Mine Tunnel Repairing Machine and the hydraulic system are designed. The three-dimensional model of the machine is established.(2) The simulation model of the hydraulic system is built up by using AMESim. And its performance is analyzed. It lays the foundations for the subsequent physical model machine.(3) Based on ANSYS Workbench, the static analysis and the finite element optimization design of the cutting head shell are carried on. The mass is reduced at the premise of meeting the requirements of actual working conditions.(4) The modal analysis of the optimized cutting head shell and the cutting shaft are finished. And it gets the natural frequencies and mode shapes. The dynamic model of the cutting head is built up based on ADAMS, and it measures the main frequencies of the cutting head shell and the cutting shaft. The results verify the the rationality of the cutting head optimization and selection. |
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