水射流辅助PDC刀具切割岩石的力学分析  

Mechanical analysis of water jets assisting PDC bit to cut rocks

作　　者：卢义玉[1] 陆朝晖[1] 李晓红[1] 康勇[1] 赵瑜[1] 

机构地区：[1]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044

出　　处：《岩土力学》2008年第11期3037-3040,3046,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金委专项创新研究群体基金项目(No.50621403);国家自然科学基金项目(No.50604019);新世纪优秀人才支持计划(NCET-06-0767)

摘　　要：通过对水射流辅助PDC刀具切割破碎岩石的力学分析,定量地确定出水射流对机械刀具受力的作用。试验研究表明,水射流辅助刀具切割岩石时刀具受力随切割深度的增加而线性增加;水射流布置在刀具底部后方,并偏离刀具铅垂中性面适当位置辅助刀具破岩时,刀具受力可减少30%～50%,并且刀具力的减少率几乎不受切割深度变化的影响。Based on the mechanical analysis of water jets assisting PDC bit to cut rock, the effects of water jets on the PDC bit forces are investigated. The following results are obtained from the experiments. The bit forces increase with the cutting depth while water jets assisting PDC bits to cut the hard rock. When water jets is directed from the bottom and offset of PDC bit, the bit forces have a great decrease. The force reduction is about 30 % to 52 %. Moreover, the change of cutting depth does not have much influence on this force reduction.

关 键 词：水射流 PDC刀具 岩石切割 力学分析 

分 类 号：TV131.63[水利工程—水力学及河流动力学]