ROCKBURST HAZARD AT THE MOROSHKA DEPOSIT UNDER MINING WITH BACKFILL

The article presents the results of the additional analysis of experimental deformation curves (air-dry rock specimens), as well as rockburst hazard and structural damage of rock mass at the Moroshka deposit. The mathematical modeling of change in stress state of rocks mass subjected to horizontal slicing with backfill is carried out. Based on the modeling results, the maximum horizontal and vertical stresses in rock mass adjacent to an extraction block are plotted as function of mining depth. The analysis of geology, physical and mechanical properties and structural damage of rock mass, as well as the change in the stress state of rock mass under horizontal slicing with backfill at the Moroshka deposit shows the absence of rockburst hazard at the project mine depth (down to 310 m), and the dynamic rock pressure events are not expected under such conditions. The Moroshka deposit down to the depth of 310 m below ground surface, subject to adherence to the accepted technology of horizontal slicing with backfill can be placed in the category of rockburst-nonhazardous rock mass.

Keywords

Rock bursts, rockburst hazard, rock mass stress state, enclosing rock and ore tendency toward rock bursts, physical and mechanical properties of rocks, horizontal slicing with backfill.

Issue number: 8
Year: 2018
ISBN:
UDK: 622.272: 622.274
DOI: 10.25018/0236-1493-2018-8-0-5-15
Authors: Aynbinder I. I., Ovcharenko O. V., Patskevich P. G.

About authors: Aynbinder I.I., Doctor of Technical Sciences, Professor, Head of Department, e-mail: geoexpert@ yandex.ru, Ovcharenko O.V., Candidate of Technical Sciences, Senior Researcher, e-mail: geoexpert@ yandex.ru, Patskevich P.G., Candidate of Technical Sciences, Head of Laboratory, e-mail: ppg1975@ hotmail.ru, Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia.

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ROCKBURST HAZARD AT THE MOROSHKA DEPOSIT UNDER MINING WITH BACKFILL

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