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Microwave-Assisted Linear Cutting of Sandstone with a Conical Pick: Experimental Study
Microwave-Assisted Linear Cutting of Sandstone… Y. Zhao et al.
https://orcid.org/http://orcid.org/0000-0003-0604-9756
As an efficient, green and energy-saving technique, microwave has shown great development prospects for assisting mechanical rock breaking due to its ability to reduce rock strength and even damage rock. To address the problems of low excavation efficiency and severe tool wear during hard rock excavation, high-power microwave was applied to assist the pick breaking the rock in this study. In addition, the heating, fracturing, and the cutting effect of the rock under different microwave parameters were analyzed. The conclusions were as follows: firstly, the rock temperature is positively correlated with microwave power, irradiation time, water content and the number of cycles. The surface temperature of the rock was categorized into a high-temperature zone, sub-high-temperature zone and low temperature zone after microwave irradiation. Secondly, rocks exhibited macroscopic cracks, causing rock blocks to peel off, resulting in fracture zones after microwave irradiation. These were correlated with the temperature zones on the rock surface. Finally, the auxiliary mechanical cutting effect of microwave was analyzed and evaluated. The average cutting force (Fmean) and the maximum cutting force (Fmax) of the rock decreased after microwave irradiation. Moreover, the length, width, and depth of the cutting groove also confirmed the great effect of microwave-assisted mechanical rock breaking. This study provides valuable insights for the practical application of microwave-assisted mechanical rock breaking in the field.
Increasing the moisture content can improve the microwave absorption capacity of sandstone.
Microwave thermal effects cause macro cracks and even cause local spalling in sandstone.
The rock-breaking effect of microwave-assisted conical pick is evaluated from the cutting force, energy, and cutting damage characteristics.
Cutting characteristics of sandstone are quantified by 3D topography scan before and after microwave irradiation.
Microwave-Assisted Linear Cutting of Sandstone with a Conical Pick: Experimental Study
Microwave-Assisted Linear Cutting of Sandstone… Y. Zhao et al.
https://orcid.org/http://orcid.org/0000-0003-0604-9756
As an efficient, green and energy-saving technique, microwave has shown great development prospects for assisting mechanical rock breaking due to its ability to reduce rock strength and even damage rock. To address the problems of low excavation efficiency and severe tool wear during hard rock excavation, high-power microwave was applied to assist the pick breaking the rock in this study. In addition, the heating, fracturing, and the cutting effect of the rock under different microwave parameters were analyzed. The conclusions were as follows: firstly, the rock temperature is positively correlated with microwave power, irradiation time, water content and the number of cycles. The surface temperature of the rock was categorized into a high-temperature zone, sub-high-temperature zone and low temperature zone after microwave irradiation. Secondly, rocks exhibited macroscopic cracks, causing rock blocks to peel off, resulting in fracture zones after microwave irradiation. These were correlated with the temperature zones on the rock surface. Finally, the auxiliary mechanical cutting effect of microwave was analyzed and evaluated. The average cutting force (Fmean) and the maximum cutting force (Fmax) of the rock decreased after microwave irradiation. Moreover, the length, width, and depth of the cutting groove also confirmed the great effect of microwave-assisted mechanical rock breaking. This study provides valuable insights for the practical application of microwave-assisted mechanical rock breaking in the field.
Increasing the moisture content can improve the microwave absorption capacity of sandstone.
Microwave thermal effects cause macro cracks and even cause local spalling in sandstone.
The rock-breaking effect of microwave-assisted conical pick is evaluated from the cutting force, energy, and cutting damage characteristics.
Cutting characteristics of sandstone are quantified by 3D topography scan before and after microwave irradiation.
Microwave-Assisted Linear Cutting of Sandstone with a Conical Pick: Experimental Study
Microwave-Assisted Linear Cutting of Sandstone… Y. Zhao et al.
https://orcid.org/http://orcid.org/0000-0003-0604-9756
As an efficient, green and energy-saving technique, microwave has shown great development prospects for assisting mechanical rock breaking due to its ability to reduce rock strength and even damage rock. To address the problems of low excavation efficiency and severe tool wear during hard rock excavation, high-power microwave was applied to assist the pick breaking the rock in this study. In addition, the heating, fracturing, and the cutting effect of the rock under different microwave parameters were analyzed. The conclusions were as follows: firstly, the rock temperature is positively correlated with microwave power, irradiation time, water content and the number of cycles. The surface temperature of the rock was categorized into a high-temperature zone, sub-high-temperature zone and low temperature zone after microwave irradiation. Secondly, rocks exhibited macroscopic cracks, causing rock blocks to peel off, resulting in fracture zones after microwave irradiation. These were correlated with the temperature zones on the rock surface. Finally, the auxiliary mechanical cutting effect of microwave was analyzed and evaluated. The average cutting force (Fmean) and the maximum cutting force (Fmax) of the rock decreased after microwave irradiation. Moreover, the length, width, and depth of the cutting groove also confirmed the great effect of microwave-assisted mechanical rock breaking. This study provides valuable insights for the practical application of microwave-assisted mechanical rock breaking in the field.
Increasing the moisture content can improve the microwave absorption capacity of sandstone.
Microwave thermal effects cause macro cracks and even cause local spalling in sandstone.
The rock-breaking effect of microwave-assisted conical pick is evaluated from the cutting force, energy, and cutting damage characteristics.
Cutting characteristics of sandstone are quantified by 3D topography scan before and after microwave irradiation.
Microwave-Assisted Linear Cutting of Sandstone with a Conical Pick: Experimental Study
Microwave-Assisted Linear Cutting of Sandstone… Y. Zhao et al.
Rock Mech Rock Eng
Zhao, Yixin (author) / Sun, Chuncheng (author) / Gao, Yirui (author) / Gao, Sen (author) / Guo, Jinbao (author) / Xie, Ronghuan (author) / Guo, Xiaodong (author)
Rock Mechanics and Rock Engineering ; 58 ; 1021-1038
2025-01-01
18 pages
Article (Journal)
Electronic Resource
English
Microwave-Assisted Linear Cutting of Sandstone with a Conical Pick: Experimental Study
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