Manual drilling machines of the type IP I0IIpolupolulyu great spread in the installation and repair work. Their main advantages are small overall dimensions, convenience of energy transportation, high safety, reliability and durability ...

The task of structural studies of chamber feeders is to determine the most suitable forms of chamber parts and assemblies, as well as a rational design of the feeder as a whole.

When studying the input of material into the slurry pipeline by chamber feeders, two possible design schemes were used: with gravity and hydrodynamic feeding of material. The most appropriate design of chamber feeders is that with hydrodynamic feeding of material, as they better meet the conditions of operation of hydraulic transport systems.

Widely used as the main mechanical means of hydraulic hoisting systems, hydro‑elevators have to a large extent exhausted their possibilities. Further design and technological improvement only slightly changes their significant disadvantages: low efficiency, high energy consumption and small lifting height.

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

Hydrotransport systems with feeders are widely used both in the USSR and abroad. The most appropriate are chamber feeders. Their construction costs, operation, simplicity of construction and reliability are basically satisfactory.

For hydraulic transportation of bulk materials of various characteristics over significant distances, the application of feeders in combination with high-pressure centrifugal pumps is promising.

Hydromechanization of mining operations was first applied in the 30s of the last century during the development of gold-bearing placers in the Ural Mountains by open-pit operations. Later, since 1852, hydromechanization began to be applied in similar conditions in California (USA), where this method became especially widespread. Hydromechanization of underground works began much later. The first hydro-mine in the USSR was built in 1939 in the Donetsk basin. A few years before that, experimental work was carried out in coal mines in the Kizelov basin in the Urals and manganese mines in the Nikopol region. At present, hydromechanization is widely used in open-pit mining for various purposes and in the development of coal deposits by underground works.

The proposed article presents the results of research on the interaction of forces during the operation of the scraper during the period of scooping the material and establishes the main technical parameters of rope scrapers. As an initial formula characterizing the process of digging of soils (or the process of scooping of bulk materials) by buckets of earthmoving machines, we take the well-known formula of N. G. Dombrovsky (see the article).