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2008•Coal Geology & ExplorationRequires access

Test results and application of new–type Steel Ball Percussion Tools

Ji Hui Feng

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Abstract

This paper analyzes the rock breaking mechanism of percussive-rotary based on the theories of solid mechanics and the stress formula of rock deformation.Besides,it offers a full review of working principle of new-type Steel Ball Percussion Tools co-developed by China and Russia and works out the relations of Percussion Tool’s parameters by analyzing the experiment data gathered in the lab and in field experiments.It is revealed that carbide-alloy(or diamond) drill bits together with steel ball percussion tools used in percussive rotary drilling leads to much improved drilling rate and reduced cost.

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What this paper is about

This paper analyzes the rock breaking mechanism of percussive-rotary based on the theories of solid mechanics and the stress formula of rock deformation.Besides,it offers a full review of working principle of new-type Steel Ball Percussion Tools co-developed by China and Russia and works out the relations of Percussion Tool’s parameters by analyzing the experiment data gathered in the lab and in field experiments.It is revealed that carbide-alloy(or diamond) drill bits together with steel ball percussion tools used in percussive rotary drilling leads to much improved drilling rate and reduced cost.

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Available abstract

This paper analyzes the rock breaking mechanism of percussive-rotary based on the theories of solid mechanics and the stress formula of rock deformation.Besides,it offers a full review of working principle of new-type Steel Ball Percussion Tools co-developed by China and Russia and works out the relations of Percussion Tool’s parameters by analyzing the experiment data gathered in the lab and in field experiments.It is revealed that carbide-alloy(or diamond) drill bits together with steel ball percussion tools used in percussive rotary drilling leads to much improved drilling rate and reduced cost.

Key concepts: Percussion, Drilling, Drill, Ball (mathematics), Carbide, Mechanical engineering, Engineering, Structural engineering

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