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-
Date submitted1990-08-13
-
Date accepted1990-10-08
-
Date published1991-11-28
Main directions of research of the Leningrad Mining Institute in the field of rock fracture
- Authors:
- N. M. Proskuryakov
Research on the problem of rock fracture in the Institute has peculiarities due to its educational nature and financing of scientific research by industrial enterprises.
-
Date submitted1990-08-01
-
Date accepted1990-10-06
-
Date published1991-11-28
Impact of dynamic and static loads on diamond crystals in hosting rocks during explosive rock breaking
The problem of ensuring the preservation of natural diamond crystals during the development of kimberlite deposits by explosive method is very relevant.
-
Date submitted1990-08-24
-
Date accepted1990-10-06
-
Date published1991-11-28
Вопросы механики гидроразрыва горячих скальных пород
- Authors:
- Yu. D. Dyadkin
The new wave of interest to mechanics and technology of hydraulic fracturing of rock massif is caused by the results of large-scale experiments of the USA, Great Britain, Japan and some other countries on creation of artificial reservoirs in hot rocks as a basis of technology of extraction of huge resources of geothermal energy accumulated by them.
-
Date submitted1990-08-27
-
Date accepted1990-10-10
-
Date published1991-11-28
Modeling as a research method in rock geomechanics
- Authors:
- V. A. Padukov
Model is a specific object reflecting essential properties of the studied object, created for the purpose of obtaining information.
-
Date submitted1990-08-01
-
Date accepted1990-10-04
-
Date published1991-11-28
Fracture and deformation of rocks as a process of statistical selection of structural elements
- Authors:
- B. G. Tarasov
One of the important properties of inhomogeneous materials, including rocks, is a significant increase in strength and elastic limit with increasing lateral pressure σ 2 .
-
Date submitted1990-08-13
-
Date accepted1990-10-18
-
Date published1991-11-28
Toward the theory of fracture of solids in compression
- Authors:
- N. A. Lavrov
- L. I. Slepyan
As evidenced by experiments, when an elastic body is compressed, it can brittle fail by crack propagation along the compression direction.
-
Date submitted1990-08-04
-
Date accepted1990-10-17
-
Date published1991-11-28
Directional destruction of rocks by elongated shaped charges
- Authors:
- M. A. Nefedov
- A. N. Murakhin
- O. A. Ryzhukhin
Since the mid 1960's in domestic and foreign practice begins to develop and improve a new progressive direction of open pit and underground mining, which is based on the contour explosion of borehole or borehole explosive charges.
-
Date submitted1990-08-11
-
Date accepted1990-10-02
-
Date published1991-11-28
Optimal crushing of rock mass at crushed stone quarries
- Authors:
- V. P. Makaryev
- O. G. Vasiliev
Mining enterprises producing construction materials (e.g., crushed stone), as a rule, have a small capacity (up to 1.5-2 million m 3 per year) and include a crushing and sorting shop.
-
Date submitted1990-08-10
-
Date accepted1990-10-20
-
Date published1991-11-28
Failure criteria for calculations of drilling and blasting parameters based on stress wave estimates
- Authors:
- S. V. Tsirel
One of the most challenging issues in using stress field calculations to determine drilling and blasting (DBI) parameters is the choice of fracture criterion(s) and their criterion values.
-
Date submitted1990-08-17
-
Date accepted1990-10-01
-
Date published1991-11-28
Influence of energy dissipation on the laws of change of maximum parameters of stress waves
- Authors:
- M. G. Menzhulin
- A. N. Shishov
In the problem of stress wave propagation in explosive explosions in condensed media, the model of the medium, which closes the system of equations of motion, largely determines the way it is solved.
-
Date submitted1990-08-26
-
Date accepted1990-10-03
-
Date published1991-11-28
About structural-temporal approach in analyzing dynamic fracture of brittle rocks
- Authors:
- N. F. Morozov
- Yu. V. Petrov
- A. A. Utkin
Many ways of modeling dynamic fracture effects relate them directly to inelastic rheology and microcrack development.
-
Date submitted1990-08-17
-
Date accepted1990-10-14
-
Date published1991-11-28
Prospects of expanding the range of industrial explosives with small critical diameter and low detonation velocity
- Authors:
- O. A. Ryzhukhin
- N. V. Rukhlina
- M. A. Nefedov
When carrying out special works on directional destruction of rocks (contour blasting, creation of extended fracture planes) to regulate the impact on the massif there is a need to use industrial explosives with a wide enough range of energetic, technological and physical-mechanical properties.
-
Date submitted1990-08-09
-
Date accepted1990-10-30
-
Date published1991-11-28
Fracturing in Rock Explosion
- Authors:
- V. Ya. Chertkov
The papers discussed an approach to the prediction of a set of characteristics of the blasted rock mass, based on the local probabilistic relationship between fractures and rock fragments and on the use of semi-empirical expressions for fracturing, natural and induced by the explosion.
-
Date submitted1990-08-21
-
Date accepted1990-10-18
-
Date published1991-11-28
Longitudinal and transverse waves excited by the explosion of a borehole cylindrical charge
- Authors:
- D. N. Klimova
- K. I. Ogurtsov
In an approximate theoretical analysis of longitudinal and transverse elastic waves generated in a solid mass under uniformly distributed action at the boundary of a cylindrical cavity of finite length, the real cavity is replaced by a cavity of infinitesimal radius.
-
Date submitted1990-08-19
-
Date accepted1990-10-27
-
Date published1991-11-28
Acoustic theory of spalling
- Authors:
- V. M. Gogolev
When compression waves propagating in solid media interact with the day surface, splintering phenomena may occur due to the interference of the incident compression wave and reflected stretching and shear waves.
-
Date submitted1990-08-02
-
Date accepted1990-10-23
-
Date published1991-11-28
Optimization of ice breaking process by cutting
- Authors:
- N. I. Vasilyeva
- P. G. Talalay
- V. K. Chistyakov
The most important and the most effective way to study glaciers is: drilling of boreholes with complete coring, but the processes of ice destruction during rotary drilling are insufficiently studied.
-
Date submitted1990-08-14
-
Date accepted1990-10-04
-
Date published1991-11-28
Fusion drilling
At present, a variety of physical methods of breaking or de-strengthening rocks are increasingly being introduced into the practice of drilling.
-
Date submitted1990-08-01
-
Date accepted1990-10-10
-
Date published1991-11-28
Melting a large-volume cavern in an ice massif for sampling
- Authors:
- A. A. Zemtsov
- N. G. Menshikov
- V. A. Chugunov
In recent years, there have been opportunities to study the internal structure of glacial covers by methods of isotopic and geochemical glaciology as a result of the introduction of new technical means and methods of deep drilling with core sampling into research.