The article describes the technology of pipeline transportation of hydraulic mixtures for stowing at underground mining. The relevance of optimization of the hydraulic mixture transportation processes is based on the fact that filling the excavated space during its abandonment is the main factor of injury prevention among workers and the integrity of industrial facilities. The aim of the study is to detail the hardening mixture transportation methods for increased distance compared to the reached distance. The maximum damage factor is a rockslide into the open excavated space; therefore, the delivery of stowing pulp to the location of use minimizes the hazard for miners. The advantages of the proposed solution are substantiated by the adopted study methods. The study results can be used for the development of a set of protective measures. The applied mixture transportation methods have been analyzed. The practices of hydraulic mixture transportation for the distance of 2.5 km, which exceeded the best global achievements, have been described. Models of the description of hydraulic mixture transportation have been provided including the models obtained by calculations and experimental pressure loss. The operation schedules in forced mode for pipeline transport have been provided. It has been demonstrated that the optimization of aspects of the issue is specifically relevant for the intensification of processes of metal deposit development. The outcomes of the experimental study can be used when involving accumulated washery refuse in the treatment. It is recommended to determine the parameters of efficient delivery of hydraulic mixtures in vibration-induced mode by modelling in accordance with the criteria of distance and reliability of transportation. The recommendations on the use of hydraulic mixture delivery technology in forced mode can be required when developing mineral deposits by open and underground methods and training highly qualified personnel.
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