Achieving method for simulating situation that straining-type rock bursting of roadway is caused by excavating unloading effect

A technology of excavation unloading and realization method, which is applied in the field of geological simulation experiment, can solve the problems of inability to realize and the process of roadway excavation is difficult to realize, etc., and achieves the effect of strong reliability

Inactive Publication Date: 2016-01-27
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First, the excavation process of the roadway is difficult to realize indoors
On-site excavation of raw rock, a process that simply cannot be done indoors

Method used

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  • Achieving method for simulating situation that straining-type rock bursting of roadway is caused by excavating unloading effect
  • Achieving method for simulating situation that straining-type rock bursting of roadway is caused by excavating unloading effect
  • Achieving method for simulating situation that straining-type rock bursting of roadway is caused by excavating unloading effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Example: Under the background of the joint action of the self-weight stress field and the tectonic stress field, the realization of the unloading strain type rockburst in the excavation of the granite circular tunnel model is carried out, and the stress and visible light pictures of the whole process are analyzed to verify the reliability of the method .

[0035] Select granite from a mine in Laizhou, Shandong, and process the rock into a model of a circular roadway, a cube with a size of 150mm×150mm×150mm, drill a through hole with a diameter of 45mm in the middle, and carefully grind the sample to make it flat Meet the experimental requirements. The experimental loading system uses RLW-3000 microcomputer-controlled dual-axis servo pressure testing machine.

[0036] Mechanics and Deformation Crack Analysis

[0037] Roadway Model Destruction Process

[0038] The failure mode of the roadway model is closely related to the direction of the maximum principal stress and ...

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Abstract

The invention discloses an achieving method for simulating the situation that straining-type rock bursting of a roadway is caused by the excavating unloading effect, and belongs to the field of geology simulating tests. The achieving method includes the following step that a hole is filled with a concrete column, wherein the cement-sand ratio is controlled, flocculating agents are added, the errors between the mechanical parameters and the roadway-surrounding-rock parameters of the concrete column are controlled to be lower than 10% by testing the mechanical parameters including the compressive strength, the extension strength, the poisson ratio and the elasticity modulus of the concrete column, and then the hole is filled with concrete after the concrete is evenly stirred. The achieving method has the advantages that by means of the achieving method for simulating the situation that straining-type rock bursting of the roadway is caused by the excavating unloading effect, the background of the combined effects of different self-weight stress fields and tectonic stress fields in a site can be fully considered, and the straining-type rock bursting process is generated in the roadway digging process in rock mass. In addition, other monitoring means are combined, the various physical-performance-change parameters in the rock bursting breeding process, the rock bursting occurring process and the rupturing process after rock bursting are collected, and reliability is high.

Description

technical field [0001] The invention belongs to the field of geological simulation experiments, and in particular relates to a method for realizing strain-type rockbursts in tunnels caused by simulating excavation and unloading. Background technique [0002] The root cause of the strain-type rockburst in the underground rock mass is that the strain energy has accumulated to a certain extent. At this time, the load on the rock mass has exceeded its uniaxial compressive strength. Phenomenon, such as the strain-type rockburst in the roadway caused by excavation and unloading. Due to the violent and instantaneous nature of the strain-type rockburst, and its destructiveness to the safety of life and property, it is very important to study this problem. Inventing a simulation method that can better realize the strain-type rock burst caused by the unloading action of roadway excavation undoubtedly provides a relatively convenient research method for analyzing such problems. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 张艳博刘祥鑫梁鹏姚旭龙田宝柱
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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