The filling slurry for pipeline pumping is transported through a pressurized pipeline using a concrete pump. The slurry mixed by the mixer is first fed into the slurry buffer hopper, and then fed into the filling pump hopper by the weight of the slurry. After being pressurized by the filling pump, the slurry passes through the filling pipe, enters the filling drilling hole near the filling station, and is transported to the filling working face along the filling pipe arranged in the roadway. The filling sequence of the goaf is controlled by a hydraulic conversion valve at the filling working face.
The selection of filling pumps and filling pipes should be comprehensively determined based on filling capacity, filling pipeline length, characteristics of green slurry, flow rate, etc. An important characteristic of paste filling slurry in pipeline transportation is the absence of critical flow rate, which can be transported over long distances under very low flow rate conditions. The flow rate is too high, and the flow of slurry needs to overcome the hydraulic pressure drop, resulting in high pipeline wear rate and high requirements for pumping pressure; If the flow rate is too low, the filling capacity cannot meet the production needs The design flow rate of the general paste filling system is 0.7 and 1.0 ms.
The coordination between the paste filling system and the coal mining system is a key issue that must be addressed in coal seam acoustic filling mining. Due to the fact that the use of acoustic filling mining to solve the problem of mining in Dabu Village is still a top priority both domestically and internationally, the use of fully mechanized berry filling requires a large amount of education and resources Because boots are suitable for household use in Wuyi, the first necessary item for driving equipment is the finishing of the work surface
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