Rock damage monitoring system under temperature-pressure coupling effect
A damage monitoring and rock technology, applied in the field of rock mechanics, can solve problems such as distortion, acoustic emission sensors that cannot be directly installed, and displacement sensors that cannot be used in high temperature environments
Active Publication Date: 2020-04-14
CENT SOUTH UNIV
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Problems solved by technology
However, in the thermal fracture research of rock temperature-pressure coupling, due to the high temperature of the rock, the acoustic emission sensor cannot be directly installed on the surface of the monitoring object, which limits the application of this technology in the field of material damage research at high temperature.
At room temperature, the axial deformation of the basic mechanical parameters of the rock can be measured by the displacement sensor, but the displacement sensor cannot be used in high temperature environments
[0004] At present, the acoustic emission experiments of rock mechanics at high temperature are mostly carried out on large-scale testing machines equipped with high-temperature furnaces (such as MTS, Instron, etc.). The acoustic emission signal generated by rock sample fracture needs to pass through the loading rod and fixture to reach the sensor, which has problems such as incomplete signal reception and distortion
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[0048] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0049] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a Integral connection; it can be a direct connection or an indirect connection through an intermediary, it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
[0050] In the basic embodiment of the pr...
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The invention, which relates to the field of rock mechanics, discloses a rock damage monitoring system under a temperature-pressure coupling effect. The system comprises a high-temperature furnace, afixing mechanism, a hydraulic oil cylinder, a pressure sensor, an acoustic emission sensor and a linear displacement sensor. The fixing mechanism comprises a high-temperature-resistant fixing rod anda high-temperature-resistant pressure transmission rod; the pressure sensor is connected with a piston rod to monitor an axial force borne by the rock, a waveguide rod is abutted against the rock; theacoustic emission sensor is connected with the waveguide rod to monitor acoustic signals sent out when the rock is broken; and the linear displacement sensor is fixed to the waveguide rod or a frameto measure axial displacement when the rock is broken. The waveguide rod is sleeved with the high-temperature-resistant pressure transmission rod, and a hydraulic loading system is connected with a hydraulic oil cylinder to control work of the hydraulic oil cylinder. The monitoring system can measure mechanical property parameters of the rock under the temperature-pressure coupling effect and elastic wave signals generated in the rock breaking process so as to evaluate the internal damage of the rock under the temperature-pressure coupling effect.
Description
technical field [0001] The invention relates to the field of rock mechanics, in particular to a rock damage monitoring system under the action of temperature-pressure coupling. Background technique [0002] The mining of deep mineral resources, the development of rock mass geothermal resources, and the storage of high-level radioactive nuclear waste are all subject to a certain degree of high temperature, and temperature is an important factor affecting the properties of rock strength, deformation, and destruction. However, in engineering practice, there is no rock mass that is thermally fractured only by high temperature, and it is often destroyed by multiple factors. Excavation and rock engineering stability analysis play a vital role. [0003] The physical and mechanical properties of rocks will change under high temperature environment, the strength of rocks will become lower, swelling and deformation will occur, local stress concentration will occur, and thus cracks wi...
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Login to View More IPC IPC(8): G01N29/14G01N3/12G01N3/06
CPCG01N3/06G01N3/12G01N29/14G01N2203/0676G01N2203/0682G01N2291/0232
Inventor 刘希灵罗雨董陇军尹土兵李生相
Owner CENT SOUTH UNIV