Karhapolov А.А., Prykhodchenko S.Yu., Chelkan V.V. Distribution of seisms foci during the mining of 19th eastern longwall and eastern inclined longwall № 3

Details
Parent Category: Geo-Technical Mechanics, 2019
Category: Geo-Technical Mechanics, 2019, № 145

Geoteh. meh. 2019, 145, 47-55

https://doi.org/10.1051/e3sconf/201910900033

DISTRIBUTION OF SEISMS FOCI DURING THE MINING OF 19-TH EASTERN LONGWALL AND EASTERN INCLINED LONGWALL № 3

1Karhapolov А.А., 1Prykhodchenko S.Yu., 1Chelkan V.V.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC  550.34.06.013.2:622.275

Language: English

Abstract.

Annotation.The introduction of modern digital seismological monitoring systems at mining facilities has opened up wide opportunities for practical application and implementation of forecasting techniques used in seismology. All this determines the exceptional relevance of the problem in controlling technogenic seismicity, as well as the development of effective measures to prevent the negative effects associated with large dynamic phenomena in mines. The purpose of the paper is to research the influence of mining-geological conditions on the distribution peculiarities of technogenic seismicity foci at the O.F. Zasiadko mine during the development of 19th eastern longwall and Eastern inclined longwall (EIL) № 3. The seismic acoustic system ARAMIS М/Е, developed by the Polish company EMAG, was applied at this mine. This system is designed to record seisms, determine their energy and coordinates of the foci epicenters. The system includes massif vibration sensors (geophones) located in the mine workings, signal transmission channels and ground-based recording modules. Seismological monitoring of the rock massif was carried out when performing stoping in 18th eastern longwall, Eastern inclined longwall etc. The sensors were placed in the plane of the m3 bed. The analysis was performed on the basis of such calculated indicators as the density function of seisms P, the average relative energy Eav.rel, as well as spatial location of foci in each longwall. These indicators made it possible to compare the number and intensity of seisms that occurred in each longwall under the various mining-geological conditions. To research the nature of technogenic fracturing, one of the methods of fractal geometry was used – the law of frequency of Guttenberg-Richter, which describes the dependence of the number of occurring phenomena on their size. In particular, there are fluctuations in the level of activity A and slope angles g by months as the longwall mines. The change in the slope of magnitude-frequency relationship showed a greater dependence of the parameters on the mining-geological conditions and the degree of disturbance in the mining section and less on the time. The nature of the change in the magnitude-frequency relationship for the 19th eastern longwall and EIL #3 indicates a significant difference in their seismic activity. Longwalls, mined out in different mining-geological conditions, differ in the relative energy of seisms, in their number, recording time and spatial location of foci.

Keywords: seismological monitoring, seismic activity, relative energy.

 

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About the authors

Karhapolov Andrii Anatoliiovych Candidate of Techical Sciences (Ph.D.), Junior Researcher in the Department of Geology of Coal Beds at Great Depths, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Prykhodchenko Svitlana Yuriivna, Candidate of Geological Sciences (Ph.D.), Senior Researcher, a Senior Researcher in the Department of Geology of Coal Beds at Great Depths, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Chelkan Vira Volodymyrivna, Master of Science, Principal Engineer of the Department of patent-licensed work and information, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine