Abstract:

On the basis of the work principles of  pneumatic-hydraulic impactor,the paper constructed the mathematical model of the impactor and rock mechanics properties during the process of impact drilling,the co-simulation was carried out  based on MATLAB and AMESim, the work status parameter  curve of impactor was obtained under  the conditions of different feedback pressures  of nitrogen chamber, different work flows  and different rock properties.The simulation results  suggest that,adjusting feedback pressure of nitrogen chamber and work  flow can realize the regulation of impact energy continuously,measurement of piston rebound speed of the impact system can realize the identification of drilling status of the iimpactor.

Key words: impactor;feedback pressure of nitrogen chamber, work flow, rock property

摘要：

在气液联合式冲击器工作原理的基础上,构建了冲击凿岩过程中冲击器和岩石力学特性的数学模型,并运用MATLAB和AMESim软件进行了联合仿真，获得了不同氮气室反馈压力、不同工作流量以及不同岩石特性条件下冲击器工作状态参数的曲线。仿真结果表明:对氮气室反馈压力和工作流量进行调节,可实现冲击器输出冲击能的无级调节；通过冲击系统活塞回弹速度的测量，可实现冲击器凿岩状态的辨识。

关键词: 冲击器, 氮气反馈压力, 工作流量, 岩石特性