Dynamic rock pressure manifestation: case study

Prospects Mining and Metallurgy Industry Development

Pavlov, A.M.^1 ; Fedolyak, A.A.^1

Irkutsk National Research Technical University, Russia^1

关键词: Dynamic zoning;    Field development;    Geological conditions;    High stress zones;    Mechanical state;    Mining process;    Ore extraction;    Production cost;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/229/1/012014/pdf
DOI  :  10.1088/1755-1315/229/1/012014

来源: IOP

【 摘 要 】

The development of the vein gold deposits in Russia results in the growing output of the underground ore extraction. The deposits' mining and geological conditions are aggravated by the increase of the mining depth (over 1,000 m) that causes a rise in the rock pressure manifested both in a static and dynamic form. This in turn leads to abrupt destruction of the rock bodies, which complicates the mining process and increases the production costs. In this connection, the federal code of field development practice requires research on the rock body's geo-mechanical state, and the corresponding geo-dynamic zoning. However, the practice shows that it is not always possible to detect the high-stress zones hazardous in terms of dynamic rock pressure manifestation [1]. The paper describes the study of the rock body's geo-mechanical state in the zone of the rock discharge from a raise at the Irokinda gold deposit. The study has defined the conditions under which the rock stress exceeds the alarm pressure level, as well as the additional factors causing a rise in the rock body stress on the workings' contour. The consideration of the above factors significantly enhances the validity of the geo-dynamic zoning prediction for the mine field rocks.