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Method for optimizing roadway area stress field in construction outside roadway

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

Active Publication Date: 2015-04-08
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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  • Method for optimizing roadway area stress field in construction outside roadway
  • Method for optimizing roadway area stress field in construction outside roadway
  • Method for optimizing roadway area stress field in construction outside 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

The invention discloses a method for optimizing a roadway area stress field in construction outside a roadway, and belongs to the technical field of roadway support. The method comprises the following steps of firstly excavating a relieving roadway at a proper location in the floor strata of a pre-excavated roadway, testing ground stress in a roadway communicated with the pre-excavated roadway, and finding the position with a maximum principal stress difference of roadway sides after roadway excavation through calculation and analysis; constructing multiple rows of stress optimization drill holes in the relieving roadway towards the position with the maximum principal stress difference, and implementing static blasting in the position of the maximum principal stress difference so as to optimize the roadway area stress field. By applying the method, a high stress roadway having no condition of a pressure relieving scheme for construction inside the roadway can be subjected to pressure relieving and roadway area stress field optimization; the method is simple, convenient to operate, good in application effect and bright in application prospect.

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 Applications(China)
IPC IPC(8): E21D9/00
CPCE21D9/00E21D9/001
Inventor 张农郑西贵付世雄岳炜刘娜师超民
Owner CHINA UNIV OF MINING & TECH
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