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Method for testing mining-induced three-dimensional stress field

A technology of three-dimensional stress and testing method, applied in geophysical measurement, instrument and other directions, can solve the problem of lack of certain understanding of the change of roadway stress field, and achieve the effect of simple process

Active Publication Date: 2013-09-11
徐州大屯工程咨询有限公司
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Problems solved by technology

[0007] However, at present, these methods only test the size of the static stress field to a certain extent, but lack a certain understanding of the changes in the stress field of the roadway under the influence of mining in front of the working face

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  • Method for testing mining-induced three-dimensional stress field

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Embodiment Construction

[0028] The specific embodiment of the present invention is described now in conjunction with the three-dimensional stress field test of a certain mine mining.

[0029] Such as figure 1 and figure 2 As shown, the stress test points are selected on the side of the roadway 50m~80m ahead of the working face or on the two sides of the roadway when the roadway has just been excavated. The roadway is the recovery roadway 1 of the advanced coal mining face, the development or preparation roadway 2, and the coal seam or rock bed floor roadway 3 .

[0030] The online monitoring device includes a monitoring host 7 equipped with monitoring software and a monitoring substation 8. The inclusion strain gauge 6 is connected to the monitoring substation 8. The monitoring substation 8 is connected to the monitoring host 7 through a mining transmission optical cable to monitor the inclusion strain in real time. Count 6 numerical changes.

[0031] A kind of testing method of mining three-dime...

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Abstract

The invention discloses a device and a method for testing a mining-induced three-dimensional stress field, and relates to the field of testing technologies for three-dimensional stress fields. The method includes testing ground stress on an advance working face by a stress relief process to obtain an original stress field of a region; embedding a relieved inclusion strain gauge back into an original borehole; grouting and compacting a cavity; acquiring data or automatically acquiring and processing the data by the aid of the inclusion strain gauge according to first measured rock mechanical parameters after a mining procedure is started so as to obtain an evolving law of the mining-induced three-dimensional stress field. If the inclusion strain gauge relieved for the first time does not meet embedding conditions, an inclusion can be embedded in a region adjacent to the borehole without relieving the stress, the rock mechanical parameters can be acquired from a first inclusion in a computation procedure, and the evolving law of the mining-induced three-dimensional stress field can be acquired. The device and the method have the advantages that a technique is simple, and three-dimensional stress variation of a mining roadway or a preparation roadway under the mining-induced influence can be effectively monitored.

Description

technical field [0001] The invention relates to the technical field of three-dimensional stress field testing, in particular to a method for testing three-dimensional stress fields [0002] This method is especially suitable for long-term dynamic monitoring of the three-dimensional stress field of surrounding rocks or chambers in coal mines, metal mines, subways, civil air defense projects and underground space projects. Background technique [0003] Coal is the main energy source in my country. In the composition of primary energy, coal accounts for more than 70%. my country is rich in coal resources but the conditions for coal occurrence are complex. 95% of coal production is underground production, and natural disasters are relatively serious. , so underground coal mining is facing many unpredictable disasters. Among them, digging roadways and mining underground in coal mines is called mining of coal or rock mass. After mining, the stress balance state of the original roc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00
Inventor 余达桂郑西贵杨高干张农陈步跃季明董立新刘娜张磊洪昊曹栩
Owner 徐州大屯工程咨询有限公司
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