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Date submitted1987-09-04
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Date accepted1987-11-27
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Date published1988-11-25
Dynamics of the feed drive of a roller cone drilling machine
- Authors:
- O. V. Kabanov
- B. S. Makhovikov
- S. G. Zaritsky
The drill feed drive consists of an electric motor, a variable displacement pump, a hydraulic line including a safety valve and a throttle regulator, a hydraulic motor and a mechanical transmission from the hydraulic motor to the drilling tool, which is also acted upon by the rotator drive.
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Date submitted1987-09-21
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Date accepted1987-11-12
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Date published1988-11-25
Water and air supply systems of underground mines and their role in stray current propagation
The modern technology of drilling and blasting operations is designed for operation of bottom-hole zone equipment using compressed air at a pressure of 0.5-0.6 MPa and water at a pressure of 0.3 Pa.
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Date submitted1987-09-03
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Date accepted1987-11-08
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Date published1988-11-25
Treatment mode of mine water at Estonslanets Production Association
- Authors:
- O. N. Chashnikov
The Estonian oil shale deposit is heavily watered, which leads to the necessity to pump out a large amount of water during development.
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Date submitted1987-09-11
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Date accepted1987-11-05
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Date published1988-11-25
Variational method of solution of dynamic problem for elastic half-space
- Authors:
- K. G. Asatur
Impulsive loading of the surface of an elastic half-space and "dome-shaped" distributed pressure encountered in the determination of contact problem stresses in hydraulic fracturing of massifs was considered in the works on the basis of solving equations by the method of separation of variables.
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Date submitted1987-09-15
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Date accepted1987-11-28
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Date published1988-11-25
Dynamics of ropes in hoisting installations with friction pulleys and tensioning devices
- Authors:
- S. S. Naumov
In mine hoisting a perspective direction is the development of hoisting installations on the basis of multi-rope hoisting machines with friction pulleys with tensioning devices.
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Date submitted1987-09-10
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Date accepted1987-11-06
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Date published1988-11-25
Experience of struggle against overgrowing of the main copper concentrate slurry lines with mineral-organic deposits
- Authors:
- Yu. N. Gulyaev
- V. D. Negerdus
With the transfer of industrial enterprises to full recycled water supply with process water there appeared the phenomenon of overgrowing of main pulp lines and water lines of recycled water with mineral-organic deposits, which gradually reduced the throughput capacity with subsequent blockage.
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Date submitted1987-09-06
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Date accepted1987-11-06
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Date published1988-11-25
Mine hoisting installations with equalizing devices of the reconstructed mines of PA Vorkutaugol
- Authors:
- V. A. Kabanov
The problem of improving the efficiency of mine lifting by increasing the capacity of the vessel at the exhaustion of load parameters of the lifting machine for both new facilities and for reconstructed mines and mines, lifting large-sized vehicles of large capacity (dump trucks, dump trucks, rail cars, etc.) can be solved by the use of equalizing devices that take a certain proportion of the tension of the ropes from the end load.
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Date submitted1987-09-29
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Date accepted1987-11-09
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Date published1988-11-25
Euler's formula for random character of friction coefficient and load in belt conveyor calculations
- Authors:
- I. I. Margolin
In the operation of belt conveyors installed in mines, mines, concentrators, often observed belt slippage on the drive drums, even in cases where the belt conveyor is mounted in strict compliance with applicable rules and its operating parameters (load, belt tension, etc.) correspond to the calculated.
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Date submitted1987-09-05
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Date accepted1987-11-28
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Date published1988-11-25
Device for pump capacity change in a model stand of hydraulic drive of a drilling machine
- Authors:
- K. N. Podozerov
Recently, hydraulic drives of volumetric control in the systems of supply of rotation of the working body are becoming more and more widespread on the machines of cone drilling.
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Date submitted1987-09-01
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Date accepted1987-11-21
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Date published1988-11-25
Determination of air parameters during its movement through the pipeline
- Authors:
- K. A. Dolgov
In a one-dimensional problem for determining the parameters of air during its movement through the pipeline can be taken the following system of differential equations.
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Date submitted1987-09-16
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Date accepted1987-11-24
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Date published1988-11-25
Calculation of head losses in pipelines on a computer program
- Authors:
- I. I. Doroshenko
In the calculation of pipelines to calculate the head losses, the formula is used...
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Date submitted1987-09-18
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Date accepted1987-11-23
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Date published1988-11-25
To the issue of static and total pressure of a mine fan
- Authors:
- S. S. Smorodin
The fan as an energy-consuming unit should be evaluated both in design and in operation from a single position in terms of the value of the spent and useful work.
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Date submitted1987-09-12
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Date accepted1987-11-12
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Date published1988-11-25
Influence of mechanodegradation on the value of the Toms effect
In the process of preparation of polymer solutions, depending on the type of stirring device and the shape of the vessel, power on the shaft and mixing time, polymer molecules are subjected to mechanical impact and in accordance with the level of this impact can be partially or completely destroyed (mechanodestructured).
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Date submitted1987-09-05
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Date accepted1987-11-23
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Date published1988-11-25
Method of transportation through pipes with percussive impact on fluid
- Authors:
- A. B. Nezametdinov
Modern technological processes utilize impact, which is obtained by means of devices that are fundamentally different from each other.
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Date submitted1987-09-17
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Date accepted1987-11-16
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Date published1988-11-25
Energy method of predicting the resource of mining machines
- Authors:
- M. D. Kolomiytsov
Currently, the power of drives (motors and gearboxes) of harvesters has increased dramatically.
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Date submitted1987-09-12
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Date accepted1987-11-12
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Date published1988-11-25
Method of determination of optimum parameters of a lifting installation on the computer
- Authors:
- N. P. Boytsov
- L. N. Zuev
On the basis of the results of theoretical and experimental studies of hoisting units with a traction device of spiral-chain type (TUSC), performed at the Leningrad Mining Institute, design dependences of design and operating parameters were obtained.
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Date submitted1987-09-07
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Date accepted1987-11-12
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Date published1988-11-25
Stresses of wheel teeth cut by copying depressions
- Authors:
- I. P. Ivanov
In the production of gears of mining and transport, hoisting, construction and road and other machines, especially in the conditions of repair plants or workshops, often cut teeth by copying the depressions with disk or finger mills.
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Date submitted1987-09-30
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Date accepted1987-11-22
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Date published1988-11-25
Asynchronous electric drive with transformer- thyristor voltage regulator
Electric drives of escalators of subways are in the same row with the rolling stock by their purpose.
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Date submitted1987-09-06
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Date accepted1987-11-15
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Date published1988-11-25
Results of oceanic tests of the bottom soil investigation unit
- Authors:
- I. P. Timofeev
- N. K. Ulashchik
- E. M. Ulyanov
During engineering and geological works on the research vessel "Akademik Aleksander Karpinsky" PGO "Sevmorgeologiya" in the Pacific Ocean was tested deep-water research unit UGI-4M, designed to carry out measurements in full-scale conditions of mechanical properties of oceanic bottom sediments at a depth of up to 6000 m.
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Date submitted1987-09-30
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Date accepted1987-11-06
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Date published1988-11-25
Evaluation of the efficiency of transportation support for offshore subsea exploration works
Currently, the USSR is working on the creation of means for search, exploration and development of mineral resources of the World Ocean.
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Date submitted1987-09-11
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Date accepted1987-11-17
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Date published1988-11-25
Dynamics of the drill string roller cone drive
- Authors:
- R. F. Nagaev
- R. I. Shkadov
Bits of the roller cone type are now very common in drilling columns and machines for geological exploration and mining purposes.
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Date submitted1987-09-26
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Date accepted1987-11-04
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Date published1988-11-25
Influence of relaxation oscillations of a brake shoe on the braking process
- Authors:
- M. M. Vetyukov
- M. Yu. Platovskikh
The problem of braking of rotational motion of a disk, at which progressive oscillations of a brake shoe arise, is considered.
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Date submitted1987-09-04
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Date accepted1987-11-01
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Date published1988-11-25
Wear and durability of embedded pipelines
- Authors:
- L. G. Gambaryan
The application of pipeline transportation in backfilling complexes poses a number of problems, the solution of which should contribute to the effective conduct of backfilling operations.