Experimental Investigation on the Effects of Microwave Treatment on Basalt Heating, Mechanical Strength, and Fragmentation
文献类型：期刊论文
| 作者 | Lu, Gao-Ming; Feng, Xia-Ting ; Li, Yuan-Hui; Hassani, Ferri; Zhang, Xiwei
|
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2019 |
| 卷号 | 52期号:8页码:2535-2549 |
| 关键词 | Microwave-assisted rock fragmentation SEM-EDX elemental analysis Crack propagation mechanism Strength reduction Fragmentation effects |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-019-1743-y |
| 英文摘要 | Microwave energy can be used to assist mechanical rock breakage for civil and mining engineering operations. To assess the industrial applicability of this technology, microwave heating of basalt specimens in a multi-mode cavity (a microwave chamber) at different power levels was followed by conventional mechanical strength and fragmentation effect tests in the laboratory. X-ray diffraction and scanning electron microscopy/energy-dispersive X-ray spectroscopy were used to determine the mineral composition and distribution of the basalt, to aid interpretation of crack propagation patterns and the associated strength reduction mechanism. These analyses demonstrated that cracks mainly occurred around olivine grains, primarily as intergranular cracks between olivine and plagioclase grains and intragranular cracks within olivine grains. Strength reduction during microwave fracturing of basalt is driven by heat from enstatite (a microwave-sensitive mineral) and volumetric expansion of olivine (a thermally expansive mineral). Uniaxial compressive, Brazilian tensile, and point load strengths all decreased with increasing microwave irradiation time at rates that were positively related to the power level. For a given power level, mechanical strength reduction can be estimated from linear relationships with irradiation time. On the other hand, a power function best described burst time (the irradiation time at which the specimen burst into fragments) vs. power level (for a given specimen size) and burst time vs. specimen size (for a given power level) relationships. Microwave-induced hard rock fracturing can be an integral part of new methods for rock breakage and tunnel excavation. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000482916300004 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14921]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Liaoning, Peoples R China; 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China; 3.McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 2A7, Canada |
| 推荐引用方式 GB/T 7714 | Lu, Gao-Ming,Feng, Xia-Ting,Li, Yuan-Hui,et al. Experimental Investigation on the Effects of Microwave Treatment on Basalt Heating, Mechanical Strength, and Fragmentation[J]. ROCK MECHANICS AND ROCK ENGINEERING,2019,52(8):2535-2549. |
| APA | Lu, Gao-Ming,Feng, Xia-Ting,Li, Yuan-Hui,Hassani, Ferri,&Zhang, Xiwei.(2019).Experimental Investigation on the Effects of Microwave Treatment on Basalt Heating, Mechanical Strength, and Fragmentation.ROCK MECHANICS AND ROCK ENGINEERING,52(8),2535-2549. |
| MLA | Lu, Gao-Ming,et al."Experimental Investigation on the Effects of Microwave Treatment on Basalt Heating, Mechanical Strength, and Fragmentation".ROCK MECHANICS AND ROCK ENGINEERING 52.8(2019):2535-2549. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。