Blasting vibration simulation impact device for shear rheological test

Abstract

The invention relates to a blasting vibration simulation impact device for a shear rheological test. The blasting vibration simulation impact device comprises an impact load generation mechanism, a transmission mechanism, a strain recording mechanism and a receiving mechanism. The impact load generating mechanism is provided with an angle dial, a pointer, a steel frame, a coil, a current controller and a pendulum bob; the transmission mechanism is provided with an incident rod, a sleeve and a combined plate; the strain recording mechanism is provided with a resistance strain gauge, a super-dynamic strain gauge and a data acquisition instrument which are connected through wires; the receiving mechanism is provided with an upper shear box, a lower shear box, a normal static load electric cylinder and a horizontal static load electric cylinder. The device is simple in structure and convenient to operate, the pendulum bob can be controlled by the current controller to generate impact load, or the pendulum bob is manually lifted to generate the impact load, so that the impact load is simply and safely generated, the impact load is applied to the upper shear box, and transient stress and high-frequency strain of a sample under the action of the impact load are recorded; and actual working conditions can be simulated more truly, so that the impact of blasting vibration simulation is more real and reasonable.

Description

technical field [0001] The invention relates to a blasting vibration simulation impact device for shear rheological test. Background technique [0002] Weak interlayers widely exist in limestone mines in Southwest my country. Due to the characteristics of low mechanical strength, poor hydraulic properties, and obvious rheological effects, weak interlayers often become the weak link in the stability of high slopes in these limestone mines. In the long-term large-scale mining process, the blasting vibration generated by bench blasting will affect the rheological properties of the weak interlayer, and become the key factor leading to the instability of the high mine slope. In order to simulate how the rheological properties of the gentle-dipping soft interlayer of a high slope change under the repeated action of blasting vibration, it is the most direct and effective method to obtain the mechanical property parameters of the soft interlayer by using the indoor shear rheologica...

AI Technical Summary

Problems solved by technology

The Hopkinson pressure bar has a complex structure and a large footprint, which is not suitable for small laboratories; if there is careless operation, the deviation of the bullet launch path will cause a huge safety hazard;

[0005] ②. In the traditional impact load application process, the pendulum is generally lifted manually, and the impact of the pendulum cannot be automatically controlled;

[0006] ③. There is a problem with the location where the impact load is applied: the location where the traditional impact load is applied is located in the lower shear box

Under long-term repeated impact, the ball structure inside the horizontal static load electric cylinder may be slightly misaligned, which will affect the servo accuracy and reduce the service life of the horizontal static load electric cylinder;

[0007] ④. In the process of applying the traditional impact load, there is a lack of recording device for the impact load, and it is impossible to record the transient pressure and high-frequency strain under the impact load

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