Slope model experimental method and system for researching exploitation and blasting dynamic instability mechanism from open pit to underground

Abstract

The invention discloses a slope model experimental method and system for researching an exploitation and blasting dynamic instability mechanism from an open pit to underground. The method comprises the following steps of manufacturing of an experimental model; loading of the experimental model, wherein an initial stress condition and different blasting vibration simulating loads of an experimentaltest block are loaded; model experiment testing. The system comprises a model manufacturing system, a model loading system and a structural plane shearing resistance strength test system, the model manufacturing system comprises an upper-lower side rock surrounding mold, a similar upper-side rock surrounding material, a similar lower-side rock surrounding material and an experimental model frame;the model loading system comprises an experimental test block initial stress state applying device and a blasting vibration simulating load applying device, and the structural plane shearing resistance strength test system comprises a stress control type shearing device, a lifting jack and a dial indicator. The slope model experimental method and system for the researching exploitation and blasting dynamic instability mechanism from the open pit to underground have the advantages that the aim of repeatable operability for simulating blasting vibration wave loading is achieved, and the attenuation law of the shearing resistance strength of the slope rock body structural plane under repeated blasting vibration effects can be objectively and visually reflected.

Description

technical field [0001] The invention relates to the field of various geotechnical engineering physical model tests for high and steep slope open-pit, underground mining or rock mass excavation, in particular to a slope model test method and system for studying the blasting dynamic instability mechanism of open-pit to underground mining. Background technique [0002] The unstable slopes caused by blasting dynamics are local defective slopes (slopes containing potential sliding structural weak planes or fault fracture zones), and the phenomenon of overall slope instability caused by them is almost non-existent. The blasting dynamic effect of the defective slope is manifested in two aspects; the first is the "weakening" effect, that is, under the repeated blasting vibration load, the mechanical properties of the structural surface of the rock mass are gradually weakened, resulting in the cumulative damage of the defective slope; the second is the "additional load". ” effect, th...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a slope model test method and system for studying the dynamic instability mechanism of open-pit to underground mining blasting in view of the above-mentioned deficiencies in the prior art. The test process is easy to operate and can re

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