Method for researching dynamic response characteristics of fault slope under blasting inertia force effect

Abstract

The invention provides a method for researching dynamic response characteristics of a fault slope under the blasting inertia force effect. The method comprises the following steps that a model box ismounted on a vibration table, then, according to the structures of a surrounding rock prototype and a fault crushed zone prototype, slope model footwall surrounding rock is poured in the model box through a surrounding rock similar material firstly, then a slope model fault is poured on the upper part of the slope model footwall surrounding rock through a fault crushed zone similar material, finally, slope model hanging wall surrounding rock is poured on the upper part of the slope model fault through a surrounding rock similar material, curing forming is conducted under the natural condition,and thus a slope test model is obtained; a plurality of monitoring instruments are embedded in the slope test model; blasting simulation vibration waves with different vibration variables are loadedto the slope test model for an orthogonal test; and the inclination and thickness of the slope model fault in the slope test model are changed, the steps are executed repeatedly, and according to themonitoring result of the monitoring instruments, the dynamic response changing rule of the fault-containing slope under the blasting vibration inertia force effect is obtained.

Description

technical field [0001] The invention relates to the field of rock blasting dynamics, in particular to a method for studying the dynamic response characteristics of fault slopes under the action of blasting inertial force. Background technique [0002] Blasting is a necessary means of mining production and engineering construction such as ore mining and rock mass excavation in my country. Repeated blasting power can easily cause slope instability with faults. From the perspective of slope blasting power, open-pit to underground mining The effects of blasting vibration loads on defective slopes are reflected in two aspects: one is the "weakening" effect. That is, the repeated action of mining blasting vibration loads leads to the expansion and deformation of the rock mass structure surface, loosening and deformation of the rock mass structure, and the reduction of the shear strength parameters, which leads to the cumulative damage and damage of the structural rock mass; the sec...

AI Technical Summary

Problems solved by technology

That is, the repeated action of mining blasting vibration loads leads to the expansion and deformation of the rock mass structure surface, loosening and deformation of the rock mass structure, and the reduction of the shear strength parameters, which leads to the cumulative damage and damage of the structural rock mass; the second is the "additional load" effect, that is, blasting vibration The generated inertial force increases the overall sliding force of the defective slope rock mass along the structural surface, which leads to the inertial dynamic instability of the unstable slope

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