Teaching demonstration device for turbidity sediment experiment and teaching method of teaching demonstration device

Abstract

The invention provides a teaching demonstration device for a turbidity sediment experiment and a teaching method of the teaching demonstration device, and relates to an experimental demonstration device. A water tank body comprises water tanks A (6) and water tanks B (9) which are arranged oppositely in the vertical direction. According to the teaching demonstration device for the turbidity sediment experiment, four blending formulas for water, mud and sand content of sedimentary turbidity current are provided according to the characteristics of four types of sedimentary turbidity current including gravel-rich type sedimentary turbidity current, sand-rich type sedimentary turbidity current, sand-mud mixed type sedimentary turbidity current and mud-rich type sedimentary turbidity current, the geological characteristics of each geologic sedimentary turbidity current are distinguished in a refined manner, the movement characteristics of each type of sedimentary turbidity current are comparatively demonstrated by the two water tanks with adjustable slope, the turbidity current flow rate is adjusted according to size and length of the slope, then sediment discharge in the turbidity current is observed, the geological knowledge of turbidity sediment is obtained, strictness and completeness of experimental operation are guaranteed, and students are helped to master the geological turbidity sediment related knowledge comprehensively and finely.

Description

technical field [0001] The invention relates to an experiment demonstration device, in particular to a turbidity flow deposition experiment teaching demonstration device. Background technique [0002] The generalized turbidity current is underwater gravity flow. Turbidity current in a narrow sense is a special form of underwater gravity flow, which is a mixture of water and a large amount of sand and mud supported by a self-suspended turbulent flow mechanism, which moves at the bottom of the water (deep water area below the wave base) density flow. Turbidity currents mostly occur in continental margins and are often triggered by factors such as earthquakes, landslides, and storm waves. They are an important mechanism for transporting terrigenous materials from shallow seas to deep seas, and can form turbidity current deposits on continental margins or ocean basins. Paleoturbidity current deposits formed during geological periods often become oil reservoirs. As a unique ty...

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Problems solved by technology

[0012] 2. At present, in the demonstration of turbidity current deposition experiments, the experiments are carried out in separate tanks, and comparison experiments cannot be carried out, and different types of turbidity currents and the depositional characteristics of turbidity currents at different slopes cannot be visually observed, which is not convenient for geology teaching Carried out, can not achieve a good learning effect

[0013] 3. Most of the existing turbidity flow deposition experiment demonstration devices use a simple glass water tank, which cannot be used for comparative experiments, that is, it is impossible to conduct comparative experiments for different sedimentary rock types under the same slope conditions and for the same sedimentary rock type at different slopes. The comparative experiment under different conditions, such as the comparative experiment between sand-rich type and gravel-rich type under the same slope, or the contrastive experiment between sand-rich type and mud-rich type with different sand content, is not thorough enough for the experimental study of turbidity current deposition. It is convenient for the study of turbidity flow deposition, but students cannot grasp the characteristics of turbidity flow deposition of gravel-rich, sand-rich, sand-mud mixed, and mud-rich sedimentary rocks well

[0014] 4. At present, when conducting geological turbidite sedimentation experiments, the mixing of mud, sand, and water is mixed randomly or added in equal proportions, and there is no mixing of different components of mud, sand, and water for the different turbidites formed. , the characteristics of the formed turbidity currents are not obvious, and students cannot distinguish the proportioning characteristics and depositional characteristics of different types of turbidity currents.

[0015] 5. The traditional geological turbidity flow deposition experiment is to place the water tank on the table or the ground. The water tank is made of transparent glass. The ground and the table itself have stripes or colors, which is easy to cause visual confusion and is not conducive to observing the characteristics of turbidity flow deposition. , not convenient for research and study

[0016] 6. In the traditional turbidity flow deposition experiment of geological sedimentology, it is difficult to change the sedimentary slope, which is not convenient for simulating the sedimentary characteristics under various slopes, and it is not convenient for studying the critical conditions of collapse turbidity. If the sedimentation has different slopes, human operation is required to change the tank The slope is very inconvenient to operate, and it is also extremely inconvenient to fix the sink after changing the slope

[0017] 7. At present, when conducting geological turbidity current deposition experiments, it is necessary to slowly pour sediment and other materials into the tank, which is time-consuming and labor-intensive, and the labor intensity is high. People keep one movement for a long time, which is easy to cause fatigue.

[0018] 8. When the current geological turbidity flow deposition experiment is carried out, the mixing device for raw materials such as sediment cannot be integrated with the water tank, and it is not convenient for materials such as sediment to enter the water tank. It is time-consuming and inconvenient to increase the preparation process for the tank experiment. Conduction of turbidity flow deposition experiments

[0019] 9. The stirring process in the existing geological turbidity flow deposition experiments is mostly manual stirring, which is low in automation, time-consuming and laborious, and mud, water and sand are poured together during stirring, which is not convenient for mixing materials and is easy to cause mixing Unevenness, slow stirring speed and long stirring time will affect the turbidity flow deposition experiment. Most of the stirring devices are drums, etc., which are easy to cause splashing of materials such as sediment and uneven stirring. The splashing of sediment and other materials needs to be cleaned ,waste time

[0020] 10. The existing stirring device can only stir at the bottom when stirring, which will lead to uneven mixing of mud, water and sand. At the same time, the stirring time will be increased to delay the turbidity flow deposition experiment.

[0021] At present, there is no device that can solve the above problems. In order to better carry out the teaching of geological turbidity current deposition experiments, a device that solves the above problems is introduced, which has certain significance for improving the learning effect of geological turbidity current deposition experiment teaching. , it is also of great significance to the study of sedimentology and has certain social value

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