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A local transient unloading test simulation system for high confining pressure in deep fractured rock mass

A cracked rock mass and transient unloading technology, applied in the direction of applying stable tension/pressure to test the strength of materials, instruments, measuring devices, etc., can solve problems such as stress state changes and disasters in surrounding rocks, and achieve a wide range of applications Effect

Active Publication Date: 2020-04-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both mechanisms may lead to changes in the stress state of the surrounding rock, which may lead to disasters
However, the existing transient unloading simulation systems are rarely simulated according to the specific engineering environment in which the rock mass is located

Method used

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  • A local transient unloading test simulation system for high confining pressure in deep fractured rock mass
  • A local transient unloading test simulation system for high confining pressure in deep fractured rock mass
  • A local transient unloading test simulation system for high confining pressure in deep fractured rock mass

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Embodiment Construction

[0023] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 A high confining pressure local transient unloading test simulation system for deep fractured rock mass shown mainly includes a rock mass model 7, a support frame 5, a test bench, a horizontal loading device, a vertical loading device, a loading and unloading device 1 and Monitoring device, described rock mass model 7 is built in support frame body 5, and support frame body 5 is arranged on the test bench; The right side of the model 7 is connected to the output end of the horizontal loading device, and the top of the rock mass model 7 is connected to the vertical loading device; connected; the input end of the monitoring device is connected with the rock mass model 7. In this embodiment, a wave-absorbing plate 4 is installed between the left side of the rock mass mo...

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Abstract

The invention discloses a transient unloading test simulation system for deep fractured rock mass under a high confining pressure. The system mainly comprises a rock mass model, a support frame body,a test bench, a horizontal loading device, a vertical loading device, a loading and unloading device and a monitoring device, wherein the rock mass model is arranged in the support frame body, and thesupport frame body is arranged on the test bench; the bottom and left side of the rock mass model are jointed with the inner wall surface of the support frame body, and the right side of the rock body model is connected with an output end of the horizontal loading device; the top of the rock body model is connected with the vertical loading device; the loading and unloading device passes throughthe support frame body, and is connected with the lower part of the right side face of the rock mass model; an input end of the monitoring device is connected with the rock mass model. The transient unloading test simulation system for deep fractured rock mass under the high confining pressure has the beneficial effects that the system can realize a simulation test capable of simulating the following two mechanisms: transient redistribution, caused by transient unloading of surrounding rock, of a secondary stress field during blasting excavation; local damage possibly caused by quasi-static change of secondary stress field due to surrounding rock creep; therefore, the transient adjustment of the secondary stress field is realized, and the system is more in line with actual unloading situation in a project.

Description

technical field [0001] The invention relates to the technical equipment field of rock engineering simulation test, in particular to a simulation system for local transient unloading test of high confining pressure of deep fissure rock mass. [0002] technical background [0003] Rocks in nature, after long-term tectonic movement and human disturbance, usually undergo transient unloading under different circumstances, and local transient unloading will cause changes in the surrounding rock stress. There are two mechanisms for surrounding rock stress changes: (1) transient redistribution of secondary stress field caused by transient unloading of surrounding rock during blasting and excavation; (2) quasi-static secondary stress field caused by surrounding rock creep Changes, local damage may occur, and then cause the transient adjustment of the secondary stress field. Both mechanisms may lead to changes in the stress state of the surrounding rock, and then lead to disasters. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0019G01N2203/0048G01N2203/0067
Inventor 罗忆曾芙翎张琪李新平王明洋刘婷婷郭运华吴天浩陈缘正
Owner WUHAN UNIV OF TECH
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