Аuthorization:
Login:
Password:
  















Detailed information

 

ROCK MASS RESPONSE TO DYNAMIC EFFECT OF BLASTING IN THE AREA OF OPEN PIT MINE



The seismic surveying cycle is performed with a view to pit wall stability monitoring during blasting operations. It is found that the lower values of the seismicity coefficient imply the stronger and more monolithic pit wall rock mass and, vice versa, the higher seismicity coefficient means the worse ground conditions, i.e. more jointed rock mass in the given pit wall area. The article illustrates capacities of open pit mine field mapping by the seismicity coefficient to detect more seismically sensitive areas nearby which blasting should be carried out with a particular care. The found relations between the PPV values and reduced distances in different areas of open pit mine field can be used for prompt adjustment of drilling-and-blasting parameters and for sufficiently accurate calculation of radius of a seismically haz ardous zone under large-scale blasting. The calculations with the conservative value of the seismicity coefficient will yield an increased mass of charge per delay stage and, consequently, the higher seismic impact in unfavorable areas of open pit mines, which is inadmissible.



: 7
2018
УДК: 622.235
DOI: 10.25018/0236-1493-2018-7-0-189-195
Authors: Alenichev I. A.

Authors' Information:
Alenichev I.A., Candidate of Technical Sciences, Researcher,
e-mail: igor-alenichev@ya.ru,
Mining Institute of Kola Scientific Centre of Russian Academy of Sciences,
184209, Apatity, Russia.

Key words:
Rock, seismicity coefficient, large-scale blast, seismic blasting action, dynamic action, reaction
of the rock mass.

References:

1. Fokin V. A. Metodicheskie aspekty analiza tekhnologicheskoy informatsii pri proizvodstve burovzryvnykh rabot v usloviyakh kar'erov [Methodical aspects of technological information analysis in drilling and blasting in open pit mines], Apatity, KNTs RAN, 2015, 133 p.


2. Fokin V. A., Melik-Gaykazov I. V., Togunov M. B., Shitov Yu. A. Osobennosti seysmicheskogo deystviya zaryadov konturnykh skvazhin v tekhnologii zaotkoski ustupov kar'era [Features of seismic effect of perimeter control blasting of benches]. Gornyy zhurnal. 2011, no 10, pp. 50—53.


3. Kamyanskiy V. N. Issledovanie prikonturnogo massiva pri proizvodstve vzryvnykh rabot na kar'erakh [Study of pit wall rock mass during blasting in open pit mine]. Gornyy informatsionno-analiticheskiy byulleten'. 2017, no 17, pp. 228—234.


4. Sadovskiy M. A. Prosteyshie priemy opredeleniya seysmicheskoy opasnosti pri vzryvakh [Simplest methods to determine seismic hazard of blasting], Moscow, IGD im. A.A. Skochinskogo AN SSSR, 1946, 29 p.


5. Ataei M., Zare M. Evaluation of Blast-Induced Damage Effects on Underground. 7th International Scientific Conference on Modern Management of Mine Producing, Geology and Environmental Protection, SGEM. Albena, 2007.


6. Mosinets V. N. Drobyashchee i seysmicheskoe deystvie vzryva v gornykh porodakh [Fragmenting and seismic effects of blasting in rock mass], Moscow, Nedra, 1976, 271 p.


7. Belin V. A., Kholodilov A. N., Gospodarikov A. P. Metodicheskie osnovy prognozirovaniya seysmicheskogo deystviya massovykh vzryvov [Methodical framework of seismic effect prediction under large-scale blasting]. Gornyy zhurnal, 2017, no 2, pp. 66—68.


8. Bondarenko I. F., Zharikov S. N., Zyryanov I. V., Shemenev V. G. Burovzryvnye raboty na kimberlitovykh kar'erakh Yakutii [Drilling and blasting in open pit kimberlite mines in Yakutia], Ekaterinburg, IGD UrO RAN, 2017, 172 p.


9. Nateghi R. Prediction of ground vibration level induced by blasting at different rock units. International Journal of Rock Mechanics and Mining Sciences, 2011. Vol. 48. Issue 6. pp. 899—908.


10. Melo C., Sharma S. Seismic coefficients for pseudostatic slope analysis. 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada, 2004. August 1—6. Paper No. 369.


11. Papadimitriou A. G., Andrianopoulos K I., Bouckovalas G. D., Anastasopoulos K. Improved methodology for estimating seismic coefficients for the pseudo-static stability analysis of earth dams. International conferences on recent advances in geotechnical earthquake engineering and soil dynamics, San Diego, California, May 24—29, 2010. pp. 1—11.


12. Kozyrev S. A., Alenichev I. A., Usachev E. A., Sokolov A. V. Seysmicheskoe deystvie massovykh vzryvov na bortakh kar'era rudnika «Zheleznyy» [Seismic effect of large-scale blasts on Zhelezny open pit walls]. Trudy Fersmanovskoy nauchnoy sessii GI KNTs RAN. 2017, no 14, pp. 288—291.


13. Kozyrev S. A., Alenichev I. A., Kamyanskiy V. N., Sokolov A. V. Osobennosti seysmicheskogo vozdeystviya vzryva otreznoy shcheli na zakonturnyy massiv i metody ego snizheniya v usloviyakh kar'era rudnika «Zheleznyy» Kovdorskogo GOKa [Features of seismic effect produced by blasted slot on pit wall rock mass and its mitigation in the conditions of Zhelezny open pit mine of Kovdor Mining and Processing Plant]. Vzryvnoe delo, 2017, no 118/75, pp. 225—235. [In Russ].


Back
Site map