新型钢球冲击器及其试验效果

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

从固体力学理论着手,利用岩石变形时的应力计算公式,分析讨论了"冲击回转"钻进的破岩机理;介绍了中俄合作开发的"新型钢球冲击器"的结构及工作原理。通过对室内及野外实验数据的分析,获得了该冲击器的各种参数关系。实践表明,采用普通硬质合金(或金刚石)钻头加钢球冲击器进行冲击回转钻进,可明显提高机械钻速,降低成本。

This paper analyzes the rock breaking mechanism of ＂percussive-rotary drilling＂ 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.