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Multi-field coupling penetration test device and method for cracked rock

A permeability test device, rock technology, applied in the direction of measurement device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of few experimental conditions, monotonous design functions, and the inability to further comprehensively explore the evolution of fractured rock permeability characteristics Mechanism and other issues to achieve the effect of improving test accuracy

Active Publication Date: 2015-08-05
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the design function of the permeability test device in the prior art is monotonous, and the experimental conditions are relatively few, so it is impossible to further comprehensively explore the evolution mechanism of the permeability characteristics of fractured rocks under the coupling of multiple fields.

Method used

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  • Multi-field coupling penetration test device and method for cracked rock
  • Multi-field coupling penetration test device and method for cracked rock
  • Multi-field coupling penetration test device and method for cracked rock

Examples

Experimental program
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Effect test

Embodiment 1

[0047] figure 1 It is a schematic diagram of the principle of a multi-field coupling penetration test device for fractured rocks. The present invention consists of a computer servo control system 60, a hydraulic system 62, a temperature control system 61, a chemical solution system 63, a pressure chamber system 64 and a measurement system 65. Among them, the computer servo control system applies multi-field coupling test conditions (such as heating, cooling, confining pressure, axial pressure, osmotic pressure, chemical field) to the pressure chamber system by controlling the hydraulic system, temperature control system and chemical solution system to measure The system measures the relevant quantities in each system, feeds back the results to the computer system, and makes relevant operations through the software settings in the computer until the end of the test.

[0048] The present invention can automatically control the test through the computer servo system, and can also...

Embodiment 2

[0058] Hydraulic system: such as figure 2 As shown, the oil in the oil tank 1 is pumped into the accumulator 5 by means of the electric motor oil pump 2, and a check valve 4 is installed in the pipeline to ensure that the oil cannot flow in reverse. When the hydraulic oil was charged into the accumulator 5, the nitrogen in the accumulator 5 was compressed to store the pressure, and the pressure gauge 6 would display the hydraulic pressure in the accumulator 5. If the pressure in the accumulator 5 is greater than the set value, the excess oil will flow back to the tank through the overflow valve 8. If hydraulic oil needs to be increased in the hydraulic system, the gas expansion force in the accumulator 5 pushes the hydraulic oil out to supplement the hydraulic system.

Embodiment 3

[0060] Loading and unloading of confining pressure: such as image 3 , Figure 5 as shown,

[0061] During the test, manually open the confining pressure oil supply valve 14, the hydraulic oil in the hydraulic system will pass through the two-position three-way valve 9, the electro-hydraulic proportional valve 11, the two-position four-way valve 12, the pressure-bearing oil cylinder 13, the confining pressure oil supply valve 14 and the confining pressure oil inlet hole 17 are filled into the confining pressure chamber 18, when oil emerges from the air outlet channel 34 of the confining pressure chamber, the confining pressure chamber 18 is filled with confining pressure oil, and the confining pressure oil supply valve is immediately closed 14. Close the air outlet channel 34 of the confining pressure chamber. When the confining pressure is applied, the confining pressure oil supply valve 14 is opened, and the hydraulic oil source will gradually pressurize the confining pres...

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Abstract

The invention discloses a multi-field coupling penetration test device and a multi-field coupling penetration test method for cracked rock. The device comprises a computer servo control system, a confining pressure chamber, a hydraulic system, a temperature control system and a chemical solution system, wherein the hydraulic system and the confining pressure chamber are connected by virtue of a confining pressure device, an axial pressure device and a seepage device respectively; the temperature control system is arranged outside the confining pressure chamber; and the chemical solution system is connected with the seepage device. The test method comprises the following steps: opening the hydraulic system, and loading an oil source; putting a sample into a pressure chamber; loading axial pressure and confining pressure; loading the seepage pressure; loading a chemical field; applying temperature; and measuring the data. The four-field loading systems are independent from one another, the evolution test research of permeability characteristics and mechanical properties of the cracked rock can be really simulated under high water pressure, large hydraulic gradient, temperature change and water chemistry complicated conditions, and the whole-process experimental research of rock deformation damage and penetration, stress, chemistry and temperature coupling can be performed.

Description

technical field [0001] The invention relates to the field of deep rock penetration tests, in particular to a penetration test device and a penetration test method for cracked rocks under complex conditions such as high stress, high water pressure, temperature, and water chemistry. Background technique [0002] Hydropower projects, nuclear waste deep burial disposal, unconventional energy mining and other projects are all built on complex deep rock foundations. These deep rocks are in high ground stress, high ground temperature, high permeable water pressure and hydrochemical environment, and extreme Complex temperature-seepage-stress-chemical (THMC) coupling. At present, the research on rock THMC coupling is mainly in the theoretical research stage. [0003] There is a triaxial rheological experimental system produced by French TOP TNDUSTRIE company, which can load confining pressure, axial pressure and pore water pressure. Wuhan Institute of Rock and Soil Mechanics has de...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 盛金昌周庆李凤滨贾春兰詹美礼罗玉龙何淑媛刘星星
Owner HOHAI UNIV
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