Difference in rockburst hazard in ore and coal mines

Geodynamics and Stress State of the Earth's Interior 2017

Lovchikov, A.V.^1

Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia^1

关键词: Coal fields;    Geotechnical conditions;    Rockburst hazards;    Rockbursting;    Stress state;    Tectonic stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/134/1/012039/pdf
DOI  :  10.1088/1755-1315/134/1/012039

来源: IOP

【 摘 要 】

In the Russian mining and engineering literature, in most cases, there is no difference in the assessment of the rockburst hazards in metal and coal mines. Nevertheless, it exists, in view of the difference in geological and geotechnical conditions of coal and ore deposits. Since ore deposits occur in the solid magmatic or metamorphic rock masses, the strongest induced earthquakes are much more powerful in ore mines than in coal mines. The main difference of rockbursting lies in the difference of natural stress state: gravity stress state in the coal fields and gravity-and-tectonic stress state in ore mines. The actual stresses are mostly vertical in the first case and horizontal in the second case, which conditions the difference in rockburst hazard in coal and ore mines.