Rock and Gas Outbursts in Copper Mines: Use of Brazilian Tests to Evaluate the Work of Disintegration of Rock Resulting from Stresses Produced by Gas Present in its Porous Structure

0559449 - ÚGN 2023 RIV AT eng J - Journal Article
Kozieł, K. - Nowakowski, A. - Sitek, Libor - Skoczylas, N.
Rock and Gas Outbursts in Copper Mines: Use of Brazilian Tests to Evaluate the Work of Disintegration of Rock Resulting from Stresses Produced by Gas Present in its Porous Structure.
Rock Mechanics and Rock Engineering. Roč. 55, č. 10 (2022), s. 6209-6225. ISSN 0723-2632. E-ISSN 1434-453X
Grant - others:AV ČR(CZ) PAN-20-18
Program: Bilaterální spolupráce
Institutional support: RVO:68145535
Keywords : dolomite and gas outbursts * Brazilian test * copper mines * rock disintegration work
OECD category: Mechanical engineering
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
https://link.springer.com/content/pdf/10.1007/s00603-022-02955-z.pdf

Rock and gas outbursts occur most frequently in coal mining. Gas-induced geodynamic events in dolomite are a new and unexplored phenomenon. In the last time, two outbursts of gas and dolomite have occurred in the Legnica-Głogów Copper Region in southwestern Poland, which is one of the world’s largest copper ore mining regions. Gas-induced geodynamic events are dependent on the co-occurrence of two factors: rock porosity, and the presence of gas under significant pressure in the pores and crevices of the rock. This paper presents a condensed energy balance for the phenomenon of outbursts of dolomites and gases. The quantity of energy depends on the type of transformation taking place during decompression. The work produced enables first the disintegration of the rock, and then its transportation along the mine working space. This paper has focused on the estimation of the energy required to disintegrate the rock. It has been estimated that 0.38 MJ is needed for the size reduction of 1 m3 of ejected mass.
Permanent Link: https://hdl.handle.net/11104/0332744