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Electrical method monitoring device suitable for true triaxial loading and use method thereof

A monitoring device, true triaxial technology, applied in the direction of measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve problems such as difficult and accurate data, on-site environment simulation deviation, inconvenient installation, etc., to avoid being affected Compression deformation damage, easy safe displacement, and the effect of improving flatness

Active Publication Date: 2021-06-18
CHINA UNIV OF MINING & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this operation mode, it is easy to change the physical structure and chemical properties of the coal rock, and destroy the integrity of the coal rock mass, which will cause a large deviation in the simulation of the on-site environment.
Moreover, at present, when measuring the electrical characteristics of coal and rock mass under uniaxial or true triaxial conditions, due to the inconvenience of installation, most of them use a small number of probes or electrodes for monitoring, and the amount of data obtained is not much, so it is difficult to comprehensively hydraulically compress coal and rock mass Study on the changing characteristics of cracking process
Chinese patent CN105716954A discloses a crack morphology electrical monitoring method for hydraulic fracturing simulation experiments. When cement is poured, a plurality of conductive graphite rod arrays are added. The change of resistivity and resistance can judge the development of cracks, but this method makes the electrode unable to be recycled, resulting in waste of materials, and the measurement method is relatively traditional, so it is difficult to obtain accurate data efficiently

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  • Electrical method monitoring device suitable for true triaxial loading and use method thereof
  • Electrical method monitoring device suitable for true triaxial loading and use method thereof
  • Electrical method monitoring device suitable for true triaxial loading and use method thereof

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] Embodiment 1: The electrical detection experiment of rock sample 6 under the condition of true triaxial loading and failure process, such as figure 1 , Figure 3-Figure 6As shown, select a rock sample 6 with a size of 500*500*500mm; determine the length, width, and thickness of the electrode mounting plate 4 according to the size of the rock sample 6 to be 500*500*20mm, and determine that 4 electrode mounting plates 4 are respectively installed on Ther...

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Abstract

The invention discloses an electrical method monitoring device suitable for true triaxial loading, which comprises an electrode mounting plate fixed on a loading plate, and a plurality of threaded holes which are used for mounting electrode bodies and are uniformly distributed in a rectangular array are formed in the electrode mounting plate; a plurality of wire grooves used for connecting end points of the threaded holes in the same column or the same row in series are formed in the side face, attached to the loading plate, of the electrode mounting plate, and the two ends of each wire groove extend to the edge of the electrode mounting plate. By adopting the device and the method, the electrical change characteristics of the rock sample in the whole loading damage process can be monitored in an omnibearing and three-dimensional manner.

Description

technical field [0001] The invention relates to the field of indoor mechanics and electrical characteristics experiments of coal and rock bodies, in particular to an electrical monitoring device suitable for true triaxial loading and a method for using the same. Background technique [0002] At present, underground geotechnical engineering has been involved in underground mining, natural gas and oil and other energy sources, and it also affects the construction of tunnels and underground caverns. Deep rock and soil bear forces in three orthogonal directions. Under axial loading conditions, the ground stress can be truly simulated, which are the maximum principal stress, medium principal stress and small principal stress. Under any mining conditions, the stress state of the underground rock and soil will be disturbed, the internal structure of the rock will change, and its electrical characteristics will also change. For example, the development of cracks will lead to an incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/06G01N3/08
CPCG01N3/066G01N3/08G01N2203/0019G01N2203/0067G01N2203/0256G01N2203/0617
Inventor 李楠赵辉燕满月蔡超陈鹏李志怀
Owner CHINA UNIV OF MINING & TECH
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