High-speed falling stone collision fragmentation indoor test device

Abstract

The invention discloses a high-speed falling stone collision and fragmentation indoor test device. The device comprises a falling stone accelerated ejection system, an automatic control system and a slope angle adjusting system, wherein the falling stone accelerated throwing system comprises a turntable, a falling stone placing box, a weight box, a support frame, a rotating shaft, a bearing, an electric brush, a belt and a driving motor, and the automatic control system comprises an electromagnetic valve switching mechanism, an infrared light source emitter, a stand column, a photosensitive sensor, a brake, a PLC control system and an extension spring; the slope angle adjusting system is composed of a slope plate and a slope plate containing frame. The device is novel in design, simple instructure and suitable for falling rock collision and fragmentation tests of different shapes and sizes, the falling rock release speed can be fully automatically and accurately controlled, the adjustable high-speed incident collision and fragmentation test of falling rock in a small space range is achieved, and the actual falling rock collision and fragmentation process is fully simulated.

Description

technical field [0001] The invention relates to an indoor test device for high-speed rockfall collision and fragmentation, which belongs to the field of rockfall disaster prediction and prevention. Background technique [0002] Rockfall is a geological disaster that occurs frequently in alpine and valley areas around the world. It is characterized by rapidity, suddenness, and randomness. It has huge destructive power and seriously endangers the safety of surrounding infrastructure, personnel, and property. In recent years, my country's infrastructure construction has progressed rapidly, and rockfall disasters caused by this have also occurred frequently. It has become another major mountainous geological disaster after landslides and debris flows. How to prevent and control rockfall disasters has become an urgent problem to be solved in our country. [0003] To prevent rockfall disasters, we must first understand the movement path of falling rocks. The movement forms of fal...

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Problems solved by technology

For the latter, it is rarely involved. On the one hand, it is due to the extremely complicated mechanism of rockfall fragmentation, and on the other hand, it is attributed to the complexity of the test; outdoor experiments can realize the impact of falling rocks on the slope under high energy, but the interference factors more, it is difficult to peel off, the reliability of the conclusions obtained is also low, and the test cost is very high; however, the current research on rockfall fragmentation cannot fully understand the influence rules and mechanisms of various factors on the characteristics of rockfall collision fragmentation. On the one hand, it is based on outdoor experiments. On the other hand, in the impact test, the rockfall speed is low, the impact energy is small, and it is difficult to control accurately. Some studies have carried out high-temperature preheating on the rocks, and their physical and mechanical properties have changed significantly. Large changes, which are seriously inconsistent with the actual rockfall collision fragmentation process, it is difficult to reveal the influence of various factors on the rockfall collision fragmentation characteristics; The indoor test device for high-speed rockfall collision and fragmentation with characteristics of rockfall events has great practical significance

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