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Testing device and method for permeability of uranium tailing and underlying rock-soil layer of uranium tailing pond

A testing device and permeability technology, which are applied in the field of uranium tailings pond safety engineering, can solve the problems of permeability testing of no uranium tailings and the underlying rock and soil layer and the variation law of permeability with time, etc.

Active Publication Date: 2019-03-19
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In previous experiments and device research, due to the influence of technology and professional fields, no device can fully and accurately simulate the underground environment’s testing of the permeability of uranium tailings and underlying rock and soil layers and the change of permeability over time

Method used

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  • Testing device and method for permeability of uranium tailing and underlying rock-soil layer of uranium tailing pond

Examples

Experimental program
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Effect test

Embodiment 1

[0077] Embodiment 1: The uranium tailings of the uranium tailings pond and the permeability testing device of the underlying rock and soil layer, including a gas pressure regulating injection system, a liquid pressure regulating injection system, a pressure measurement system, an excitation system, a back pressure system, and a flow metering system , data collector 32 and incubator 35.

[0078] The gas pressure regulating injection system includes a carbon dioxide gas storage tank 1, a nitrogen gas storage tank 2, a booster pump 3, a first gas mass flow controller 4, a second gas mass flow controller 5, a third gas mass flow controller Device 10, digital display meter 6 of the first real-time pressure collector, digital display meter 9 of the second real-time pressure collector, high-pressure regulator valve 7, low-pressure regulator valve 8, and solenoid valves V1-V9.

[0079] The carbon dioxide gas storage tank 1 is connected to the inlet end of the first gas mass flow contr...

Embodiment 2

[0107] Embodiment 2. The method of testing the permeability of uranium tailings and the underlying rock and soil layer by using the uranium tailings pond and the permeability test device of the underlying rock and soil layer in the uranium tailings pond. This embodiment uses gas-liquid mixing to measure the underlying rock and soil layer Permeability and uranium tailings permeability, the specific steps are as follows:

[0108] A. Preparation before the test

[0109] A1. Remove the rock-soil sample holding device 18 and the uranium tailings filling device 19 from the vibration excitation device 33 in the test device, and put the obtained standard-sized underlying rock-soil layer sample into the rock-soil sample holding device 18 , put the uranium tailings into the uranium tailings filling device 19 in layers, and compact the uranium tailings to the density value of the in-situ uranium tailings body, and fill the rock soil sample holder 18 and the uranium tailings after filling...

Embodiment 3

[0126] Embodiment 3. The method of testing the permeability of uranium tailings and the underlying rock and soil layer by using the uranium tailings pond and the permeability test device of the underlying rock and soil layer in the uranium tailings pond. In this embodiment, a single mixed gas is used to measure the underlying rock and soil layer Permeability and uranium tailings permeability, the specific steps are as follows:

[0127] A. Preparation before the test

[0128] A1. Remove the rock-soil sample holding device 18 and the uranium tailings filling device 19 from the vibration excitation device 33 in the test device, and put the obtained standard-sized underlying rock-soil layer sample into the rock-soil sample holding device 18 , put the uranium tailings into the uranium tailings filling device 19 in layers, and compact the uranium tailings to the density value of the in-situ uranium tailings body, and fill the rock soil sample holder 18 and the uranium tailings after...

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Abstract

The invention discloses a testing device for the permeability of uranium tailing and underlying rock-soil layer of a uranium tailing pond and a trial assembly method. The testing device comprises a gas pressure-regulating injection system, a liquid pressure-regulating injection system, a pressure measuring system, an excitation system, a pressure returning system, a flow metering system, a data acquisition unit and a calorstat which are connected by pipelines.By adoption of the testing device, the underground environment is simulated to test the permeability of gas-liquid mixture, single gas and single liquid of the underlying rock-soil layer and the uranium tailing of the uranium tailing pond under different depths, temperatures and vibration frequencies and the change rules of the permeability along with the time so as to provide theoretical basis for estimation on the environmental protection and seepage-flow stability of the uranium tailing pond.

Description

technical field [0001] The invention relates to the field of uranium tailings pond safety engineering, in particular to a testing device and a testing method for testing the permeability of uranium tailings and underlying rock and soil layers in the uranium tailings pond. Background technique [0002] The permeability of uranium tailings is one of the indispensable parameters in the study of seepage theory. Testing the permeability of uranium tailings in uranium tailings ponds can not only evaluate the seepage state and stability of uranium tailings dams under changes in reservoir water level and heavy rainfall, but also predict the risk of groundwater pollution in reservoir areas by harmful substances in uranium tailings. At the same time, for uranium tailings dams of different types and heights, due to man-made or natural effects, the rise of the reservoir water will form different osmotic pressures on the dam body, which will cause seepage damage inside the uranium tailin...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 刘永李向阳潘宇翔娄亚龙彭国文房琦雷波
Owner NANHUA UNIV
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