Downhole High-Pressure Air Hammers for Open Pit Mining
A. A. REPIN1, B. N. SMOLYANITSKY1, S. E. ALEKSEEV1, A. I. POPELYUKH2, V. V. TIMONIN1, V. N. KARPOV1
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Novosibirsk State Technical University, pr. K. Marksa 20, Novosibirsk, 630092 Russia
Keywords: drilling, downhole air hammer, hole, heat treatment, strength, reliability
Abstract
The energy upside potential of downhole air hammers is considered. The article presents the constructional diagram of a new air hammer using high compressed air pressure (up to 3 MPa). The experimental testing of the operating cycle of the air hammer is reported. The authors ascertain the air hammer steel requirements and the steel heat treatment modes to enable extended life of the air hammer parts. Industrial trials of the air hammers are described.
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