Self-circulation energy-saving device for dividing the critical particle size of tailings sand moving matter and suspended matter

Abstract

The invention discloses a self-circulation energy saving device of critical particle size for separating tailing sand bed loads from suspended loads; and based on theoretical knowledge on traditional sediment aspect, a physical model is used as a carrier to search the critical particle size for separating the tailing sand bed loads from the suspended loads. A manual windlass lifting water head water tank, a lifting bracket and am energy dissipating ball are used for obtaining similar uniform currents with different unit discharges; the energy dissipating ball is positioned in a water inlet pipe port for connecting a water head water tank with a model box; and the lifting bracket is positioned at the lower part of the model box. The self-circulation energy saving device has the beneficial effects of water saving, environmental protection, low cost and simple operation, can change various indexes of sand samples to repeat tests, and can change the water head and the lifting bracket to obtain the similar uniform currents with different characteristics. The self-circulation energy saving device searches the critical particle size for separating the tailing sand bed loads from the suspended loads, and has important significance on research of such aspects as the sediment discharge, the silting parts of the bed loads and the suspended loads and the shape and the expansion of a break opening in overtopping dam break.

Description

technical field [0001] The invention belongs to the technical field of researching the migration law of non-viscosity granular accumulations under the action of water flow, in particular, it is a basic test device for studying the formation and expansion of flooding of tailings dams under the action of rainfall. Background technique [0002] At present, when the tailings dam overflows, the research on the formation mechanism and expansion law of the collapse is rarely published. Most of the few papers make breakthroughs in theory with the help of fluid mechanics, and the conclusions are often that there are relatively large gaps. Analytical solutions with large errors lack qualitative rules as proofs. Other studies are mostly based on soil engineering tests to study the stability of tailings dams under water erosion and the mechanism of dam failure, and the theory used is often based on unsaturated soil mechanics. It has not been able to give a positive and accurate explana...

AI Technical Summary

Problems solved by technology

However, this formula is a regional empirical formula with great limitations and cannot be applied to other rivers

Images