2008•Geology and ProspectingRequires access

STEEL BALL PERCUSSION DEVICE AND ITS APPLICATION

Chunhua Lu

Abstract

Problems of drilling middle soft to middle hard rock formation with hard alloy rotary percussion drilling have been put forward.Effects of outdoor and indoor rotary percussion drilling tests on steel ball percussion device with obviously improved penetration rate has been introduced,based on dissertating structure and working principle of steel ball percussion device. Correlation between blow frequency and air pressure,air quantity has been set up,using method of mathematical statistics,which can be used to forecast and control blow frequency and other important technological parameters.It is indicated that steel ball percussion device has a good generation prospect.

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Key concepts: Percussion, Ball (mathematics), Drilling, Mechanical engineering, Penetration rate, Geology, Acoustics, Marine engineering