Achievement of economic effect while ensuring the reliability of transportation plants without additional costs is the basis for the intensification of hydrotransport.

One of the options for hydraulic transportation of bulk materials in difficult mining conditions are cascade devices that allow to feed the pulp from a great height.

Analysis of the work of hydrotransport complexes at mining enterprises shows that so far the efficiency of hydrotransport does not correspond to the technical capabilities of this type of transportation ...

Economic efficiency of hydrotransportation is based on the compliance of transportation parameters with the minimum costs of construction and operation of the hydrotransportation system ...

Hydraulic transportation of solid material is one of the important elements of the technological process of mining and processing of minerals. At present, the total length of hydraulic transportation lines in the USSR is more than 3 million km, and the volume of transported material - more than 300 million tons. ...

Studies of the movement along the slurry lines of hydraulic mixtures with different degrees of saturation showed that this process is probabilistic, this is due to the random nature of the distribution of the frequency of pulsations of velocities and the occurrence of turbulent vortices in the flow. With increasing concentration of hydraulic mixture, the suspending capacity of the flow increases, while the intensity of its mechanical impact on the solid component increases, the probability of collision of particles among themselves increases.

Hydraulic transportation of ores is usually accompanied by a change in the particle size distribution of the transported material. This is especially characteristic for transportation of multifractional hydraulic mixtures along complex routes, with a significant difference in the marks of the beginning and end of the line.

To conduct experiments to study the process of flow of bulk material from the chambers of the hydraulic feeder in the laboratory of the Department of Mechanization of Mining Operations LGI was mounted experimental installation, which is a single-section chamber feeder ...

The study of the physical essence of abrasive wear of pipes during hydraulic transportation of multifractional slurries makes it possible to solve one of the topical issues of this process - their durability and reliability. Recently this question has aroused great interest of researchers. The intensity and nature of hydro-abrasive wear of pipes determine the parameters justifying the mode of transportation of hydraulic mixture in pipelines; physical and mechanical properties of the transported slurry; physical and mechanical properties of the pipe material; chemical and mechanical properties of the carrier fluid ...

During the research of the hydrofilling complex operation mode, a radioisotope density meter PZHR-2M with the measuring range of 0.5 g/cm3 was used to measure the density of the hydraulic mixture. This range in some cases did not meet the conditions of the hydrofill complex operation. Often the mixing device could not provide complete filling of the pipeline. Then air moved along the pipeline with the pulp, and the device showed the density value less than one. For correct evaluation of the work of the stowing complex it was necessary to know the character of pulp movement with incomplete utilization of its cross-section. For this purpose the measuring limits of the instrument were extended by means of lead tared plates placed between the source unit and the pipeline. By changing the thickness and number of plates, it was possible to have several measurement ranges: 0-0.5; 0.5-1.0; 1.0-1.5 g/cm3 ...

At hydraulic transportation of fine-grained materials for their delivery to the surface from depths exceeding 100 m, there is a necessity of feeding these materials by slurry pumps into the mine drainage pipeline through a special feeder. Such a feeder is a hollow cylinder, included in the network of the main drainage header. Special gate valves allow either to disconnect the feeder from the header at the moment of loading it with material, or to direct the pressure jet created by the main drainage pumps into the feeder cylinder at the moment of material washing out. In this way, the eroded material in the form of a slurry of low concentration (H : L up to 1 : 20) is discharged to the surface by the main dewatering header.