Determination of Mixing and Conveying Parameters in a Phosphate Rock Filling System

Abstract

Abstract A phosphorus mine in Hubei Province adopts the roof cutting room pillar method of non rail equipment layered mining. With the extension of exposure time, the stress in the goaf further changes and the pillar has begun to damage, and the failure rate has a trend of increasing. In order to avoid large-scale goaf caving, the mine decided to adopt concrete cemented filling method to mine unstable pillars. In filling material preparation and filling system, mixing technology, equipment and conveying system play an important role. In this paper, according to the actual situation of the mine, we have carried out investigation, analysis and calculation, finally, the slurry transportation and mixing process, the pipeline transportation model and main pipeline transportation parameters has been determined. It provides a theoretical basis for the application of filling method.