Method for Predicting the Principal Stress Direction of Underground Stress Field in Coal Mine

A technology of stress direction and prediction method, applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problems of complex on-site stress test process, poor coal seam gas drainage effect, lack of in-situ stress parameters, etc., and achieve convenient large-scale Simple and effective methods of development and prediction, and the effect of broad economic and social benefits
CN106285745BInactive Publication Date: 2019-07-09HENAN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HENAN POLYTECHNIC UNIV
Publication Date
2019-07-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an underground coal mine stress field principal stress direction predicting method. The method is mainly characterized by including the steps that a regional stress field type is preliminarily predicted according to the regional structure evolution history and the modern structure movement characteristics; crossed tunnels with the basically same supporting type in the same stratum are selected for further judging and observing the regional stress field type; the maximum horizontal principal stress direction of the stress field at an observation site is judged according to the underground stress trace geometrical characteristics; through the combination of the stress field type and the maximum horizontal principal stress direction, the maximum principal stress direction, the intermediate principal stress direction and the minimum principal stress direction of the stress field are judged. By means of the method, the problems that an existing coal mine stress field testing method is high in engineering cost and complicated in process are solved; by means of the relations of tunnel deformation, stress trace characteristics, stress field type and principal stress direction, the economical, practical and effective underground coal mine stress field principal stress direction predicting method is put forward.
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Description

technical field

[0001] The invention belongs to the technical field of coal mine safety, and relates to a method for predicting the principal stress direction of an underground stress field in a coal mine.

[0002] technical background

[0003] Safety in coal mine production is the most important issue. In order to solve the safety production of coal mines, the in-situ stress field test in the mine area is an essential basic work to prevent safety accidents. In the ground stress field test, according to the vertical stress σ of the ground stress test site v , the maximum horizontal principal stress σ H , the minimum horizontal principal stress σ h The relationship between the numerical values ​​of the three, the in-situ stress field is divided into σ H >σ v >σ h Type, σ H >σ h >σ v Type, σ v >σ H >σ h There are three types. Different mines may belong to different geostress field types due to different mining depths and regional geological movemen...

Claims

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