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Journal of Mining Sciences

2014 year, number 6

Analysis of Radiation Near-Zone of Downhole Unbalance Vibration Exciter

V. V. SKAZKA1,2, S. V. SERDYUKOV1, M. V. KURLENYA1
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Sobolev Institute of Mathematics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 4, Novosibirsk, 630090 Russia
Keywords: coal-and-rock mass, vibration impact, downhole unbalance vibration exciter, numerical modeling, radiation near-zone, wave field

Abstract

The article reports numerical investigation of radiation near-zone of a downhole unbalance vibration exciter. It is found that vibration intensity is spatially variable and depends on vibration frequency. The authors specify the vibration exciter work mode required to ensure maximum impact on coal-and-rock mass in the vicinity of degassing holes at the limited power of the vibration exciter drive.