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Device and method for physical simulation test of stability of deep tunnel surrounding rock

A technology of surrounding rock stability and physical simulation, which is applied in measurement devices, strength characteristics, instruments, etc., to achieve the effect of low cost and simple test device

Inactive Publication Date: 2012-10-10
INST OF GEOMECHANICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching, there is no mature and accurate physical simulation test device and method for simulating the stability of surrounding rock in deep tunnels.

Method used

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  • Device and method for physical simulation test of stability of deep tunnel surrounding rock
  • Device and method for physical simulation test of stability of deep tunnel surrounding rock

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0050] 1. Experimental device

[0051] 1. Overall

[0052] Such as figure 1 , 2 , the test device includes a sample 00, a deep tunnel rock mass model instrument 10, a drilling surface 20, a vertical pressure system 30, a pressure plate 40, a distributed optical fiber monitoring system 50, an optical fiber 60, a strain gauge 70, a miniature shield machine 80, continuously variable gearbox 90 and data acquisition system 100;

[0053] Its connection relationship is:

[0054] Put a pressure plate 40 on the sample 00 in the deep-buried tunnel rock mass model instrument 10, set a vertical pressure system 30 on the pressure plate 40, and load to simulate the self-weight stress;

[0055] The micro-shield machine 80 drills into the sample 00 from the drilling surface 20, and the micro-shield machine 80, the continuously variable gearbox 90 and the motor are sequentially connected to realize ...

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Abstract

The invention discloses a device and a method for a physical simulation test of the stability of a deep tunnel surrounding rock and relates to a rock-soil mechanic technology. A structure of the device is that a pressure plate is covered on a sample in a deep tunnel rock body model instrument, and a vertical pressure system is arranged on the pressure plate and used for loading so as to simulate and exert gravity stress. A miniature shield machine drills into the sample from a drilling surface, and the miniature shield machine, a stepless speed changing box and a motor are sequentially connected to achieve drilling. Eight optical fibers and six strain gauges are distributed in the sample, the optical fibers are connected with a distributed optical fiber monitoring system, and the distributed optical fiber monitoring system and the strain gauges are respectively connected with a data acquiring system so as to achieve detection and recording. By means of the device and the method for the physical simulation test of the stability of the deep tunnel surrounding rock, a development and change law of stress strain when a deep tunnel rock body is excavated in tunnel construction can reappear accurately, and a novel solving path for researching the stability of the grotto surrounding rock and forming mechanism of rock burst in the tunnel construction.

Description

technical field [0001] The invention relates to rock-soil mechanics experiment technology, in particular to a physical simulation test device and method for surrounding rock stability of deep-buried tunnels. Background technique [0002] During the planning and construction of deep tunnel engineering, the stability of surrounding rock in caverns is a problem that geotechnical and geological engineering workers must pay great attention to. The surrounding rock of the cavern generally refers to the rock and soil within a certain range around the underground cavern, which is deformed and redistributed by stress due to local excavation. Due to the difference in geological conditions, rock bursts and large deformations of soft rocks are prone to occur. Engineering geological problems are directly related to the safety, progress and quality of underground cavern construction. Rockburst is a phenomenon of dynamic failure such as rock slices (blocks) flying and throwing, and cave w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00
Inventor 张永双郭长宝张瑞端蒋良文周能娟杜宇本
Owner INST OF GEOMECHANICS
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