Design And Research On Underground Coal Mine Emergency Drainage Vehicle

With the abundant coal resources,China is the world’s largest coal-producingcountry and the largest consumer of coal. The large coal consumption promotesthe increasing exploitation of coal and brings the problem of coal mine safety.Among the harmful insecurity, the flood disaster has a major impact in the processof mining. With the development of technology and the frequent occurrence ofcoal mine flooding accident, more and more attention has been paid to theprevention and treatments measures of mine flood in the mining industry. Theemergency of coal mine flooding accident and the complexity of the rescue bringsome problems in the current emergency rescue. In terms of the existing problemsin the current rescue, it is necessary to research the emergency drainage vehicle,which has high integration, good adaptability, less preparation time and can walkon the rail and road.Based on the research and analysis on the causes and rescue of coal mineflooding, the current rescue was summarized and classified and the inclined tunnelrescue was mainly analysed. Then the design principles and scheme of the emergency drainage vehicle were made. Top-down modular design was used todesign the tacked module, the rail module, the frame module, the pump liftingmodule and so on. The SolidWorks software was used in the parametric and thewhole model design.The tracked traveling mechanism, the road-rail-shifting mechanism and theframe was analysed in detail. With the parametric design and selection, the trackedmechanism was determined. The dynamic characteristic of road-rail-shiftingsystem was analyzed and the feasibility of the system was verified. The static andmodel analysis of the frame was carried out by the FEM, then the optimizationdesign was made. The rationality of the frame design was proved.With the simplifying model of drainage vehicle and the road modelestablished in the RecurDyn software, the dynamics simulation, which was aboutthe drainage vehicle moving in the inclined shaft tunnels， was carried out.Through the dynamics simulation, it proved that the drainage vehicle can runsmoothly when faced with the flat road, the slope, the obstacle, the ditch and thedirection change. The stable walking performance and the rational resign wasverified by the dynamics simulation, which also provided the basis for the furtherstudy.In terms of the existing problems in the current rescue, the pipe, the valve,the flange and the pump were researched and designed to match with theemergency drainage vehicle. The steel wire braided high pressure pipe and thepolyurethane flexible pressure pipe were used to instead of the thick-walled seamless steel pipe. The relay pumps were also researched. The integrated ballvalve pipe and the integrated double disc check valve flange were designed. Thenumerical simulation was made to verify the feasibility of the pipes with doubledisc check valves. The rescue progress of the emergency drainage vehicle systemwas proposed.Finally, the experiments about the relay pump system and the emergencydrainage vehicle were made to verify the feasibility by test and data collection andanalysis.