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True-triaxial coal-rock mass solid-liquid coupling experimental device capable of carrying out instantaneous unloading

A technology of unloading device and experimental device, which is applied in the direction of measuring device, applying stable tension/pressure to test the strength of materials, instruments, etc., can solve the problems that the occurrence and development process of coal rock gas dynamic disaster cannot be reproduced in the whole process, and the lack of instantaneous unloading device, etc. , to achieve the effect of solving the visualization problem

Inactive Publication Date: 2019-06-14
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing triaxial test system lacks an instantaneous unloading device, which cannot simulate the dynamic instantaneous unloading, which is the triggering condition of coal-rock gas dynamic disasters, and thus cannot fully reproduce the occurrence and development process of coal-rock gas dynamic disasters.

Method used

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  • True-triaxial coal-rock mass solid-liquid coupling experimental device capable of carrying out instantaneous unloading
  • True-triaxial coal-rock mass solid-liquid coupling experimental device capable of carrying out instantaneous unloading
  • True-triaxial coal-rock mass solid-liquid coupling experimental device capable of carrying out instantaneous unloading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An instant unloading device for solid-fluid coupling experiment of true triaxial coal-rock mass, refer to figure 1 and image 3 , including: rigid pipeline 1, loading rod 2, loading plate 3, loading plate reset device 4, magnet 5, first pulley 6, pad 7, right pressure head 8, second pulley 9, lateral oil pump 10, loading rod Resetting device 11 and fixed rod 12.

[0042] One end of the rigid pipeline 1 is provided with a through hole for the loading rod 2 to pass through, and the other end of the rigid pipeline 1 is open, and one end of the loading rod 2 passes through the through hole and connects with the inside of the rigid pipeline 1. The loading plate 3 is connected, the loading plate 3 is in contact with the inner wall of the rigid pipe 1 , and the loading plate 3 can slide in the rigid pipe 1 with the movement of the loading rod 2 .

[0043] The loading plate resetting device 4 is located in the rigid pipeline 1, and one end of the loading plate resetting devic...

Embodiment 2

[0047] An instant unloading device for solid-fluid coupling experiment of true triaxial coal-rock mass, refer to figure 2 and image 3 , the rigid pipeline 1 is made of transparent glass fiber reinforced plastic; the rigid pipeline 1 is provided with a high-speed camera 14 outside. After the coal and rock mass is destroyed, the debris flying out consumes energy. During the experiment, a high-speed camera can be used to shoot the experiment process in real time. Observing the movement trajectory of the damaged coal and rock mass is of great help in analyzing the kinetic energy consumed.

Embodiment 3

[0049] An instant unloading device used for the solid-fluid coupling experiment of true triaxial coal-rock mass, the same as that of embodiment 1, the difference is that: the loading plate reset device 4 and the loading rod reset device 11 are both springs, with the lateral oil pump 10 Apply extrusion force to the right pressure head 8, and then push the loading rod 2, push the loading plate 3 to squeeze the coal sample 13, the spring is stretched, and when the extrusion force is removed instantaneously, the spring shrinks instantaneously, so that the loading plate 3 At the same time as the loading rod 2 is pulled back, the loading plate 3 is quickly out of contact with the coal sample, so as to simulate the instability and destruction process of the coal sample when the confining pressure is quickly released; the setting of the magnet 5 helps Adsorb the loading rod 2 on the right pressure head 8 accurately and quickly.

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Abstract

The invention belongs to the technical field of a rock mechanics simulation device, and particularly relates to a true-triaxial coal-rock mass solid-liquid coupling experimental device capable of carrying out instantaneous unloading. The device comprises a sealed cavity, an axial pressure unit, a confining pressure unit, a gas unit and an instantaneous unloading device; according to the invention,by adding the gas unit on the basis of a true-triaxial tester, gas seepage speeds in three stress directions are separately tested by a switching valve, gas emission when an instantaneous unloading test sample has an instable failure also can be tested, and the high-stress high-gas well recovery process when deep coal mining is carried out can be simulated better, so as to research a dynamic disaster mechanism; and the true-triaxial coal-rock mass solid-liquid coupling experimental device well solves problems that an existing triaxial test system is short of an instantaneous unloading deviceand cannot simulate a trigger condition of dynamic instantaneous unloading so as not to completely represent the evolutionary process of a coal-rock gas dynamic disaster and the like.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics simulation devices, and in particular relates to a real triaxial solid-fluid coupling experimental device for coal-rock mass that can be unloaded instantaneously. Background technique [0002] In the Background of the Invention, the disclosed information is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art. [0003] In recent years, with the increase of energy demand, domestic mines have entered into deep mining one after another. The depth of coal mining in my country is increasing at a rate of 10-25m per year. The mining depth of many mines has reached 800-1000m, and more than 50 pairs of mines in the country have a depth of more than 1000m. . The increase of mining depth ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/02G01N3/06
Inventor 刘杰张冉撒占友卢守青王春源
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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