The formation of separation cracks in the extraction of block stone
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2017, Vol 80, Issue 2
Abstract
Currently, the undisputed leader of the destruction of strong rocks by mining as open-pit and underground mining is drilling and blasting method. The main disadvantage of this method is the seismic effect of the explosion to rock, the violation of their integrity, the development of cracks and weakening of the array. The most acute effect is visible while production of block materials, delineation of mine workings. The use of low-blasting explosives, cartridges and charges for special constructions allow us to reduce dynamic impact on blasthole area, however, their use leads to higher costs and in some cases does not provide the necessary end results. For example, in the extraction of block stone losses reach more than thirty percent. One of the possible ways of solving this problem is the use of static methods of destruction of rocks. Currently, a variety of ways of non-explosive destruction, in particular, mechanical methods are developed. Most of these methods are under research and design development. Their industrial use is hampered by lack of equipment, low reliability, high energy consumption, hazardous impact on human, high cost. All these drawbacks force to look for ways to create a cheap and promising way of cutting hard rocks. One of the perspective directions of the static fracture of rocks is the use of non-explosive destructive compositions of LDCs. The features of the management of cracking in holes in the separation of the stone blocks with the use of non-explosive destructive compositions (LDCs) with industrial unit that contains control panels are analyzed. The conditions of crack growth of the split relative to the axes of anisotropy with the maximum or minimum strength are defined. The features of the control the direction of fracturing in boreholes in the separation of the stone blocks using a non-explosive mixtures destructive (LDCs) with industrial units, which include the control panels are analyzed. The conditions of crack growth of the split relative to the axes of anisotropy with the maximum or minimum strength are defined.
Authors and Affiliations
S. M. Stovpnik, A. I. Kovtun, N. F. Kachynska, O. S. Pryt
Keywords
Related Articles
- EP ID EP256706
- DOI -
- Views 121
- Downloads 0
On the task of building the routes of passenger buses of two automobile companies
The article formulates a mathematical model search of n bus routes between the two points, which carry out cruises corresponding to the specified schedule, and with specified duration. The duration of each route consists...
Analysis of the speed of a searchless digital correlation-interferometric direction finder with two-dimensional correlation processing of the spatial signal
For today, the biasing of radio electronic devices is carried out in conditions of a rapidly changing electromagnetic environment: with multipaths of radio waves, overlapping of the frequency of useful signals and noise,...
Experimental research on the effect of liquid active filler on the properties of locally manufactured explosives
Different explosives with correspondent charges constructions are used to increase the effectiveness of the explosion in the process of crushing rock masses. Therefore, the development of simple locally manufactured expl...
The development of the multifunctional device for the information and control telemechanical complex
The article presents the development of the multifunctional device for the information and control telemechanical complex with the use of the signal microcontroller. The multifunctional device provides three telemechanic...
Investigation of technical and operational parameters of the bus route «Nadvirna - Ivano-Frankivsk» through Bogorodchany town settlement and through Tysmenychany village
Providing the needs of the suburban population in passenger car transportation is one of the main tasks of local authorities, transport companies and private entrepreneurs. Market relations have led to the fact that rout...