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IEEE Transactions on Industry Applications, 1977
A technique has been developed for rock breaking which could be considered as an alternative to drilling and blasting. A series of tests and measurements involving initial dielectric breakdown achieved with high frequency power, followed by highly localized heating achieved by capacitor discharge energy is described.
R. S. Segsworth, K. Kuhn
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A technique has been developed for rock breaking which could be considered as an alternative to drilling and blasting. A series of tests and measurements involving initial dielectric breakdown achieved with high frequency power, followed by highly localized heating achieved by capacitor discharge energy is described.
R. S. Segsworth, K. Kuhn
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Physica Scripta, 2023
In the context of rock fragmentation, the application of high voltage electric pulses results in the transfer of electrical energy onto the surface of the rock material, leading to a rapid electrical breakdown and the formation of a plasma channel.
Pingping Rao +5 more
semanticscholar +1 more source
In the context of rock fragmentation, the application of high voltage electric pulses results in the transfer of electrical energy onto the surface of the rock material, leading to a rapid electrical breakdown and the formation of a plasma channel.
Pingping Rao +5 more
semanticscholar +1 more source
Developments in rock-breaking techniques
Tunnelling and Underground Space Technology, 1994Abstract A problem with secondary breaking at an Australian mine led to a study of new rock-breaking technologies. Many of the techniques being developed had emerged from the thrust in the U.S.A. for continuous drill-break excavation. Such approaches to rock breaking highlighted the applicability of what normally would be classified as tunnelling ...
C. Murray, S. Courtley, P.F. Howlett
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Electric Impulse Technology – Breaking Rock
2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe), 2020Hard rock destruction and comminution is directly linked with a high energy demand and high costs. Conventional tools are working against the compression strength of the rock. This results in an intense wear of the used tools due to the high forces needed to destroy hard rock.
Matthias Voigt +4 more
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International journal for numerical and analytical methods in geomechanics (Print)
During shield tunneling in composite strata, the disc cutter's abnormal damage rate rises sharply under interface impact, due to strata inhomogeneity. This study investigates the dynamic response and the cause of the peak impact force of disc cutters at ...
Shangqu Sun +4 more
semanticscholar +1 more source
During shield tunneling in composite strata, the disc cutter's abnormal damage rate rises sharply under interface impact, due to strata inhomogeneity. This study investigates the dynamic response and the cause of the peak impact force of disc cutters at ...
Shangqu Sun +4 more
semanticscholar +1 more source
2016
Based on fieldwork in Kinshasa and Paris, Breaking Rocks examines patronage payments within Congolese popular music, where a love song dedication can cost 6,000 dollars and a simple name check can trade for 500 or 600 dollars. Tracing this system of prestige through networks of musicians and patrons – who include gangsters based in Europe, kleptocratic
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Based on fieldwork in Kinshasa and Paris, Breaking Rocks examines patronage payments within Congolese popular music, where a love song dedication can cost 6,000 dollars and a simple name check can trade for 500 or 600 dollars. Tracing this system of prestige through networks of musicians and patrons – who include gangsters based in Europe, kleptocratic
openaire +2 more sources
Soviet Mining Science, 1980
Rock can be successfully drilled with a tubular rock-breaking tool in a high-energy percussive rig, fitted over the outer surface of the striker mass, surrounding it, and pushed ahead of the striker mass by an amount of the order of the wall thickness of the tool.
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Rock can be successfully drilled with a tubular rock-breaking tool in a high-energy percussive rig, fitted over the outer surface of the striker mass, surrounding it, and pushed ahead of the striker mass by an amount of the order of the wall thickness of the tool.
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Physics, 2014
A new computational model of porous materials like sandstone shows what happens microscopically when the material is stressed to the breaking point.
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A new computational model of porous materials like sandstone shows what happens microscopically when the material is stressed to the breaking point.
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