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Natural stress measuring device

A stress measurement and natural technology, applied in the field of rock mechanics, can solve the problem that the natural stress measurement method cannot meet the natural stress test of rocks, etc., and achieve the effects of reliable experimental results, cost saving and accurate measurement.

Pending Publication Date: 2021-10-29
YANGTZE UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, provide a natural stress measurement device, and solve the technical problem that the natural stress measurement method in the prior art cannot meet the technical requirements of the rock natural stress test in a complex stress state

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] see Figure 1 to Figure 4 , the natural stress measurement device provided by the embodiment of the present invention includes a flat jack 1, a hydraulic system 2, a deformation monitoring system 3 and a data analysis system (not shown in the figure).

[0033] The flat jack 1 is used to apply expansion force to the pre-excavated flat cave 4, and pressure sensors (not shown) are installed on both sides of the flat cave;

[0034] The hydraulic system 2 is connected to the flat jack 1 and is used to provide hydraulic pressure to the flat jack 1;

[0035] The deformation monitoring system 3 is...

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Abstract

The invention discloses a natural stress measuring device. The device comprises a flat jack, a hydraulic system, a deformation monitoring system and a data analysis system; the flat jack is used for applying expansive force to a pre-excavated flat cave, and pressure sensors are mounted at the two sides of the flat cave; the hydraulic system is connected with the flat jack and used for providing hydraulic pressure for the flat jack; the deformation monitoring system is electrically connected with the hydraulic system, the deformation monitoring system is used for measuring the distance between two preset monitoring points, and the hydraulic system can adjust the hydraulic pressure according to the distance measured by the deformation monitoring system; and the data analysis system is electrically connected with the two pressure sensors and is used for calculating the magnitude of the natural stress according to pressure values collected by the two pressure sensors when the distance between the two monitoring points recovers to an initial value. According to the invention, the problem that the current natural stress measurement method cannot meet the technical requirements of rock natural stress test in a complex stress state is solved.

Description

technical field [0001] The invention relates to the technical field of rock mechanics, in particular to a natural stress measuring device. Background technique [0002] The stress in rock mass is an important factor that must be considered in rock mass stability and engineering operation. The stress existing in the rock mass before human engineering activities is called natural stress or geostress. As a result of human engineering activities on the surface or in the rock mass, the natural stress in the rock mass will be changed within a certain range. The stress changed by engineering activities in rock mass is called redistributed stress. In contrast to the redistributed stress, the natural stress in the rock mass can also be called the initial stress. The natural stress measurement of rock mass in my country began in the late 1950s, and was widely used in production practice in the 1960s. So far, tens of thousands of data have been obtained from rock mass stress measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01B11/16
CPCG01L5/00G01B11/16
Inventor 温韬王艳昆唐瑞旋
Owner YANGTZE UNIVERSITY
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