A high-speed rockfall collision and fragmentation laboratory test device

Abstract

The invention discloses an indoor test device for high-speed rockfall collision and fragmentation, which comprises a rockfall accelerated projection system, an automatic control system and a slope angle adjustment system. , brushes, belts, and drive motors; the automatic control system consists of a solenoid valve switch mechanism, an infrared light source emitter, a column, a photosensitive sensor, a brake, a PLC control system, and a tension spring; the slope angle adjustment system consists of a slope panel and a slope panel The device is composed of a placement frame; the device is novel in design and simple in structure, and is suitable for impact fragmentation tests of falling rocks of different shapes and sizes, and can perform automatic and precise control of the release speed of falling rocks, realizing adjustable high-speed incident collisions of falling rocks in a small space Fragmentation test fully simulates the actual rockfall collision fragmentation process.

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 falli...

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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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