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Published on 25 April 2020

RESEARCH OF RESONANCE PHENOMENA IN FROZEN ROCKS WITH VARIOUS SPEEDS OF LONGITUDINAL WAVES USING RELAY TYPE WAVES

V. N. Krynkina, A. V. Kuzina

When constructing vertical shaft shafts in unstable flooded rocks at significant depths, it is impossible to do without blasting to develop rocks in the face. However, blasting often leads to emergency damage to freezing columns. In this case, there is a pattern that the destruction occurs in the zones of contact of the rock layers, and in the homogeneous massif there is no destruction. Therefore, the aim of the work is to determine the technological conditions of penetration under which destruction occurs and to determine the mechanism of column destruction.
To solve the problem posed in the article, a set of research methods was applied: processing statistical data on the causes of emergencies, stating the problem of the development of wave processes during blasting in a layered array, proving the effect of an increase in energy density in the boundary layer of rocks with different acoustic impedances.
Based on the studies and evidence, an explanation of the mechanism of column destruction in the contact zone of different-speed rocks is proposed. A method for calculating the pressure at the front of an explosion shock wave is proposed, which destroys a freezing column in a well in the contact zone of different-velocity rocks.
Conclusion: the compression effect of a frozen drilling fluid located in the gap between the rock wall of the well and the freezing pipe is revealed, the further mechanism of compression and flattening of the freezing pipe with a dent is explained.

CityMoscow
CountryRussia
UDC622.234.3 (047)
Issue2020, № 1 (Т. 12)
Key wordsvertical shaft, ice wall, freezing pipe, wave guide, generalized Rayleigh waves, drilling and blasting method of rock excavation, freezing pipe deformation.
Number of views (726)

Categories: Articles

Tags: вертикальный ствол, ледопородное ограждение, замораживающая колонка, волновод, поверхностные волны Рэлея, буровзрывной способ разработки пород, деформация замораживающих колонок.

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ISSN 1998-4502 (Print)                                                            ISSN 2499-975Х (Online)