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Electrode optimization placement method for improving stability of surrounding rocks in roadway

A technology of surrounding rock stability and layout method, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of long electrochemical modification time and affecting the improvement of soft rock strength, and is beneficial to deformation and stress control , reduce the amount of deformation, and inhibit the deformation of the roadway

Inactive Publication Date: 2014-01-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third is that no electrolyte is added during the implementation of electrochemical modification, and the microscopic components and structures inside the soft rock mass do not fully participate in the electrochemical reaction. increase in rock strength

Method used

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  • Electrode optimization placement method for improving stability of surrounding rocks in roadway
  • Electrode optimization placement method for improving stability of surrounding rocks in roadway
  • Electrode optimization placement method for improving stability of surrounding rocks in roadway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] a) According to the characteristics of the surrounding rock of the roadway and its control requirements on the stability of the surrounding rock and the existing construction technology, drill a borehole 9 with a diameter of 28mm along the section perpendicular to the axis of the roadway, and the distance between the boreholes 9 along the circumference of the roadway, The row spacing along the roadway axis and the drilling length are both 0.5 times the radius of the arched roadway. A rod-shaped iron anode electrode 7 with a diameter of 20mm and a length of 500mm is placed in the deep part of the surrounding rock, that is, at the bottom of the drilling hole. That is, a disk-shaped iron cathode electrode 6 with a diameter of 200 mm and a thickness of 20 mm and a central hole diameter of 28 mm is fixed at the hole opening.

[0032] b) Use insulated wires 4 and 5 to connect the fixed cathode electrodes 6 at the openings of the drilled holes in the modification area and the a...

Embodiment approach 2

[0037] a) According to the characteristics of the surrounding rock of the roadway and its control requirements on the stability of the surrounding rock and the existing construction technology, drill a borehole 9 with a diameter of 42mm along the section perpendicular to the axis of the roadway, and the distance between the boreholes 9 along the circumference of the roadway, The row spacing along the axial direction of the roadway and the length of the borehole are both 0.8 times the width of the roadway. A rod-shaped copper anode electrode 7 with a diameter of 30mm and a length of 1000mm is placed in the deep part of the surrounding rock, that is, at the bottom of the borehole. A disc-shaped copper cathode electrode 6 with a diameter of 300mm and a thickness of 30mm and a central hole diameter of 42mm is fixed at the mouth;

[0038] b) Use insulated wires 4 and 5 to connect the fixed cathode electrodes 6 at the openings of the drilled holes in the modification area and the ano...

Embodiment approach 3

[0043] a) According to the characteristics of the surrounding rock of the roadway and its control requirements on the stability of the surrounding rock and the existing construction technology, drill a borehole 9 with a diameter of 36mm along the section perpendicular to the axis of the roadway, and the distance between the boreholes 9 along the circumference of the roadway, The row spacing along the axial direction of the roadway and the length of the drilled hole are both 1 times the height of the roadway. A rod-shaped copper anode electrode 7 with a diameter of 25 mm and a length of 800 mm is placed in the deep part of the surrounding rock, that is, at the bottom of the drilled hole. A disc-shaped iron cathode electrode 6 with a diameter of 250mm and a thickness of 25mm and a central hole diameter of 36mm is fixed at the orifice;

[0044] b) Use insulated wires 4 and 5 to connect the fixed cathode electrodes 6 at the openings of the drilled holes in the modification area and...

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Abstract

An electrode optimization placement method for improving the stability of surrounding rocks in a roadway belongs to the technical field of modifying the surrounding rocks of the soft rock roadway. The invention particularly relates to an electrode optimization placement method for electrochemically improving the stability of the surrounding rocks of the clay soft rock roadway. The specific placement method comprises the steps of: putting an anodic electrode in the deep part of the surrounding rocks of the clay soft rock roadway (i.e. the bottom end of a drill) by drilling, and fixing a cathode electrode on the surface of the surrounding rocks (i.e. the hole mouth of the drill). CaCL2 or AlCl3 electrolyte with concentration of 1-5mol.1<-1> is injected into the anode side through a high-pressure hose, after a direct-current power supply is switched on, the direction of electroosmosis changes from the deep part of the surrounding rocks to the surface of the shallow part of the surrounding rocks, so that water in a in rock mass of a modified area is drained from the deep part of the surrounding rocks to the shallow part of the surrounding rocks in an electroosmosis way, and higher drainage speed, higher drainage rate and better drainage and solidification effects are achieved. The method provided by the invention is beneficial for deformation and stress control of the surrounding rocks in the roadway, and the long-term stability of the surrounding rocks of the clay soft rock roadway is improved remarkably.

Description

technical field [0001] The invention relates to an electrode optimization arrangement method for the stability of roadway surrounding rock, which belongs to the technical field of soft rock roadway surrounding rock modification, and specifically relates to an electrode optimization arrangement method for electrochemically improving the stability of clay soft rock roadway surrounding rock, which is applicable to Electrochemical modification and reinforcement of clay soft rock roadway or cavern surrounding rock that is easy to hydrate, expand, disintegrate and soften in underground engineering, providing an optimized electrode for improving the stability of clay soft rock roadway surrounding rock by electrochemistry Layout method. Background technique [0002] In underground engineering, soft rock masses rich in clay minerals are often encountered. The main clay mineral components are montmorillonite, illite, kaolinite, and illite-montmorillonite. , it is easy to soften, expa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E02D3/11
Inventor 康天合刘宁王政华陈金明郭卫卫
Owner TAIYUAN UNIV OF TECH
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