Establishing patterns of destruction of naturally disturbed rock massifs by an explosion
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2019, Vol 83, Issue 1
Abstract
It is noted that the effectiveness of explosive destruction of naturally broken and fractured rock massifs depends primarily on the strength and structural characteristics of rocks and the characteristics of the formation, interaction and propagation of stress waves in the array. It is proved that one of the main parameters, which characterizes the physical properties of rock, is the propagation velocity of longitudinal stress waves in a mountain massif. Therefore, in the above studies, it has been suggested that this characteristic of the environment retains its significance in naturally disturbed rocks. It has been established that a significant decrease in the intensity of stress waves in inhomogeneous disturbed media with a decrease in the size of natural separations makes it difficult to reasonably describe the process of destruction of an array based on existing patterns of elastic wave propagation. This also includes the development of engineering methods for controlling the energy of an explosion in naturally disturbed arrays, taking into account the parameters of stress waves. However, such difficulties do not exclude the need to take into account stress waves indirectly, in particular, through their propagation velocity. To estimate the volume of destruction of mountain ranges of an impaired structure by an explosion, it was proposed to use the velocity of propagation of stress waves in a real array, as a component in acoustic impedance. It has been established that with an increase in the speed of propagation of longitudinal waves in a naturally disturbed rock massif, the volume of their destruction increases. It is proved that with an increase in the velocity of propagation of stress waves from 1000 m / s to 6000 m / s, the volume of destruction of a naturally disturbed array increases 2.2 ... 2.4 times, depending on the type of rock.
Authors and Affiliations
А. А. Frolov, M. I. Beltek
Keywords
Related Articles
- EP ID EP626467
- DOI -
- Views 116
- Downloads 0
Probabilistic-Stochastic Model of Distribution of Physical and Mechanical Properties of Soft Mineral Rocks
The physical and mechanical characteristics of soils and soft rocks obtained as a result of laboratory tests are important initial parameters for assessing the stability of natural and artificial slopes. Such properties...
Establishment of the effective modes of the slowdown explosion by rocks destruction at quarries
Existing for today theoretical modeling tools of the mass explosion do not fully consider the sequence and intensity of destruction of the rock mass. This leads to significant energy losses in the explosion. Therefore, t...
To the question of the factual quantity of simultaneously blow up borehole charges
The basis for investigations to determine the actual number of simultaneously exploded wellbore charges is the regularity of determining the intensity of oscillations in the explosion of dispersed charges. The peculiarit...
Improving durability of the coated end mill when machining titanium alloys due to bedding
The paper shows the results of the research of opportunities to increase the durability of the end coated mills when machining titanium alloys due to bedding. To this purpose the existing methods of improving the durabil...
Specificities of choosing of tolerances of the rolling bearings and of the parameters of geometry precision of the shaft and housing surfaces
The standards and methods concerning assignment of rolling bearing fit with shafts and frames via example of bearing 6-208 are analyzed. We set certain differences of recommendations according to GOST 3325-85, "Rolling b...