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A method for optimizing the stress field in the roadway area for construction outside the roadway

A technology of stress field and roadway, which is applied to optimize the regional stress field in the roadway, and optimize the field of roadway regional stress field in the construction outside the roadway, which can solve the problems such as inadequacies, and achieve the effect of convenient operation, simple method and good implementation effect

Active Publication Date: 2016-08-17
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] Technical problem: the purpose of this invention is to provide a kind of drilling and blasting for construction outside the roadway for the problem that some deep wells and high ground stress roadways do not have the conditions of the construction pressure relief scheme in this roadway, and the pressure relief must be carried out before excavation. Method for Optimizing Roadway Regional Stress Field

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  • A method for optimizing the stress field in the roadway area for construction outside the roadway
  • A method for optimizing the stress field in the roadway area for construction outside the roadway
  • A method for optimizing the stress field in the roadway area for construction outside the roadway

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Embodiment Construction

[0024] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0025] The method for optimizing the regional stress field of the roadway in the construction outside the roadway of the present invention, the specific steps are as follows:

[0026] (1) The test of ground stress obtains the position of the maximum principal stress difference: in the roadway 6 connected with the pre-excavation roadway 1, the construction stress is relieved from the borehole 7, such as figure 2 As shown, the ground stress is measured using the stress relief method, and the magnitude and direction distribution of the principal stress are obtained. After the pre-excavation roadway 1 is excavated, the relative distance between the maximum principal stress difference position 3 of the two sides of the pre-excavation roadway and the pre-excavation roadway side is calculated and determined. c: The vertical distance e between the stress relief bo...

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Abstract

Disclosed is a method operating outside of a passageway for optimizing the passageway regional stress field, said method relating to the technical field of passageway protection. First, boring a pressure-relieving passageway (2) at an appropriate location in the floor rock layer of a passageway to be bored (1); measuring, inside of a passageway (6) in communication with the passageway to be bored (1), the crustal stress; calculating and analyzing the principal stress to obtain the position of the greatest difference of principal stress (3) on the wall after the passageway is bored; constructing from the inside of the pressure-relieving passageway (2) multiple rows of stress optimization holes (4) toward the position of the greatest difference of principal stress (3); performing static blasting at the position of the greatest difference of principal stress (3), thereby optimizing the passageway regional stress field. The present method relieves the pressure for passageways that have high stress but do not meet the requirements for pressure relief from inside of the passageways, and optimizes the passageway regional stress field. The method is simple and easy to operate, and has good implementation results and a prospect for wide application.

Description

technical field [0001] The invention relates to a method for optimizing the regional stress field of a roadway during construction outside the roadway, and is especially suitable for optimizing the regional stress field of the roadway before excavation of deep wells and high ground stress roadways, and belongs to the technical field of roadway support. Background technique [0002] The deformation of the roadway is an inevitable phenomenon in coal mine production. Due to the differences in the specific conditions of the roadway, different deformation phenomena such as roof sinking, two sides moving closer, and bottom heaving will occur, making the roadway section unable to meet the requirements of ventilation, transportation, pedestrians, Demand for production activities such as transportation. Especially after coal mining enters deep mining, the roadway is transformed into a high-stress roadway. High-stress roadways in deep wells have the characteristics of high pressure, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00
CPCE21D9/00
Inventor 郑西贵张农付世雄岳炜刘娜师超民
Owner CHINA UNIV OF MINING & TECH
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