高压空化水射流破碎岩石的试验分析  

Experiments on Breaking Rock With High-pressure Cavitating Water Jets

作　　者：卢义玉[1] 冯欣艳[1] 李晓红[1] 向文英[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400030

出　　处：《重庆大学学报（自然科学版）》2006年第5期88-91,103,共5页Journal of Chongqing University

基　　金：教育部博士点基金(200030611025);重庆市科委自然科学基金(2005BB7040)

摘　　要：在不同泵压和淹没压力条件下,针对不同类型的空化喷嘴对高压空化水射流破碎岩石效果进行了一系列实验研究,其主要目的是探讨高压空化水射流的冲蚀能力与水力参数的相互关系,提高破岩效率。结果表明:射流的驱动泵压与冲蚀深度成正比;围压增加将使冲蚀深度降低;水射流存在一个最佳靶距;冲蚀时间具有区域性,冲蚀深度最终将趋于稳定,增加不明显;收敛型喷嘴的冲蚀深度远小于缩放型喷嘴的冲蚀深度.How to achieve the most efficient rock-breaking is the research direction of the rock-breaking technique. According to this problem, a series of experiments relating to the rock-breaking efficiency of cavitating water jets were carried out for different nozzles within different pump pressures and ambient pressures. The results show that the erosion depth increases proportionally with the pump pressure and decreases as the ambient pressure increasing on the same experimental condition. Erosion happens in the first few minutes, and after that, erosion does not increase with time. The erosiondepth of the convergent-straight nozzle is much lower than that of the convergent-divergent nozzle.

关 键 词：砂岩 高压空化水射流 破岩 

分 类 号：TU443[建筑科学—岩土工程]