Can we mine blocks of stone using blast methods while minimizing damage to the stone?
In order to ensure the process of directional fracturing, it is necessary that the pressure of blast products would be greater than the tensile strength of a rock, and, for the preservation of a peripheral rock mass, the pressure of blast products in a blasthole should not exceed the rock compressive strength. These conditions are achieved by selecting rational blasthole spacing and optimal parameters of a blast pulse.
It was established that for the most probable propagation of radial main rupture between blasthole charges during stone block mining it is necessary to use the effect of stress wave interaction.
It should be noted that in order to minimize the zone of induced fracturing, the charge amount should be selected so that the tensile stress field in the plane of the rupture does not exceed the tensile strength. The main rupture propagation begins with the arrival of a rarefaction wave reflected from the surface of the separated stone block.
You can learn more about this from the article in our journal:
🔥 Kovalevsky V.N., Mysin A.V., Sushkova V.I. Theoretical aspects of block stone blasting method. Mining Science and Technology (Russia). 2024;9(2):97-104. https://doi.org/10.17073/2500-0632-2023-12-187 🔥
Subscribe to the journal's Telegram channel:
👉t.iss.one/MinSciTech👈
#inenglish #MST #mining #stone #blast #block_massive #blast_pulse
In order to ensure the process of directional fracturing, it is necessary that the pressure of blast products would be greater than the tensile strength of a rock, and, for the preservation of a peripheral rock mass, the pressure of blast products in a blasthole should not exceed the rock compressive strength. These conditions are achieved by selecting rational blasthole spacing and optimal parameters of a blast pulse.
It was established that for the most probable propagation of radial main rupture between blasthole charges during stone block mining it is necessary to use the effect of stress wave interaction.
It should be noted that in order to minimize the zone of induced fracturing, the charge amount should be selected so that the tensile stress field in the plane of the rupture does not exceed the tensile strength. The main rupture propagation begins with the arrival of a rarefaction wave reflected from the surface of the separated stone block.
You can learn more about this from the article in our journal:
🔥 Kovalevsky V.N., Mysin A.V., Sushkova V.I. Theoretical aspects of block stone blasting method. Mining Science and Technology (Russia). 2024;9(2):97-104. https://doi.org/10.17073/2500-0632-2023-12-187 🔥
Subscribe to the journal's Telegram channel:
👉t.iss.one/MinSciTech👈
#inenglish #MST #mining #stone #blast #block_massive #blast_pulse
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