期刊
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
卷 181, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.petrol.2019.06.030
关键词
Rock breaking; Geothermal energy; Hot dry rock; Liquid nitrogen; Abrasive jet
资金
- Natural Science Foundation of China [51521063]
- National Science Fund for Distinguished Young Scholars [51725404]
- 111 Plan [B17045]
- China Scholarship Council
Abrasive liquid nitrogen (LN2) jet is regarded as one of the most efficient methods to break hard rock, such as hot dry rock (HDR), due to its unite low-temperature property. In this study, a novel experimental setup is designed to achieve abrasive LN2 jet under high-pressure condition. The impingement experiments with abrasive water jet is also conducted to characterize the rock-breaking features under cryogenic condition. The influences of six important parameters on rock-breaking are investigated in detail. The results indicate that compared with abrasive water jet, abrasive LN2 jet can create a larger and more irregular cavity with the lower threshold pressure. The parametric study shows that nozzle pressure drop mainly affects the cavity depth, while the nozzle diameter affects the cavity-opening diameter noticeably. The particle diameter and rock temperature both have a great influence on cavity-opening diameter and cavity depth. This study can provide theoretical support for abrasive-LN2-jet application.
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