Discussion on structural optimization of fly ash slurry mixing bucket device in coal mine overburden separation layer grouting system
The fly ash slurry mixing bucket device is widely used in the grouting technology of overlying rock separation layer.This study mainly focuses on the problems of clogging,compaction,and slag discharge in the actual operation of the fly ash slurry mixing bucket device.The aim is to solve the problems of compaction,blockage,and uneven mixing in the slurry preparation process through technological innovation,and reduce the impact of the slurry preparation process on the grouting system of overlying rock separation layer.Emphasis is placed on optimizing the structure and operating parameters(water cement ratio,flushing water pressure)of the fly ash mixing device.The design solves the problem of fly ash plate formation at the bottom of the mixing bucket by using porous tube technology and appropriate pressure water flow to disturb the mud accumulation at the bottom of the bucket;Add porous tubes at the feeding point to impact the agglomerated fly ash and ensure uniform pulping;Through pilot tests,the results showed that setting a porous tube with an opening diameter of 10mm,a spacing of 300mm between openings,and a drooping plate can solve problems such as mixing drum plate formation,motor burnout,and downstream filtration equipment blockage when the water supply pressure is 0.3 MPa and the water cement ratio(volume)is 1.07.
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