Trigger Initiation of Elastic Energy Release in High–Stress Geomedium
A. P. BOBRYAKOV, V. P. KOSYKH, A. F. REVUZHENKO
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: shearing, trigger effects, soft loading, faults, friction, sliding
Abstract
The authors have developed and manufactured a test bench and a measurement apparatus for modeling movement of surfaces of faults with a pre–loaded granular filler in rock mass under trigger destressing. The trigger is a weak seismic wave generated by a single point–wise blow. It is found that displacement discontinuities appear under drop of force. It is shown that soft loading consumes much energy and destressing in this case results in smaller drop of forces but larger displacements. The authors find out that displacements are initiated by the destressing wave that lowers contact friction in the geomedium.
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