DEFINITION OF SHOCK WAVE POWER AT MASS BLASTS IN THE OJSC “YuGOK” PIT

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Parent Category: Geo-Technical Mechanics, 2013

Category: Geo-Technical Mechanics, 2013, Issue 111

UDC 622.235: 622.271

Fedin K.A. (SHEI “KNU”)

Abstract. Technological process of hard rock crushing is usually performed by drilling and blasting. Mass explosions in quarries significantly affect the condition of facilities and technological objects, which are located in the area of the blast. Therefore, specifying of power of the impact air waves at mass explosions is a strong business case for today.

Results of monitoring of the air shock wave power at mass explosions in the YuGOK quarry in 2009-2010 are presented. It is stated that the wave actual power was not more than 10-36% of maximum permissible value. It is shown that use of packing material of proper quality provides a possibility to produce mass explosions at any weather in any season of the year at a distance of at least 400 meters from residential buildings without any damages of  the window glasses.

The resulting empirical dependence of excess pressure in the shock front on the explosive charge power allows to ensure safety parameters while calculating mass explosions.

Keywords: open-pit mining, massive blast, shock air wave.

References:

1. Gurin, A.A. (1978), Upravlenieudarnymivozdushnymivolnamiprivzryvnykhrabotakh[Management of shock airwaves from blasting], Nedra, Moskva, Russia.

2. Parameters of shock waves of air and methods to reduce them under massive explosions in quarries (1984), Nygre, Kryvyi Rih, Ukraine.

3. Zeitlin, J.A. and Smoliy, N.I. (1981), Seysmicheskie i udarnye vozdushnye volny promyshlennykh vzryvov [Seismic and shock airwaves industrial explosions], Nedra, Moscow, Russia.

4. Uniform rules for safety during blasting operations: DNAOP 0.00-1.17-92 (1992), Publishing House of the "Standard", Kiev, Ukraine.

5. Terms of mining explosions. The safety standards of seismic ground motion: DSTU 4704:2006-P (2007), Derzhspozhivstandart, Kiev, Ukraine.

About the authors:

Fedin Konstantin Anatolievich, Post Graduate Student of the Department of “Open–pit mining” of Kryvyi Rih National University, Kryvyi Rih, Ukraine.

 

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