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Method for monitoring mine rock stress state by electromagnetic radiation method

A technology of electromagnetic radiation and stress state, which is applied in the direction of testing machinery, earthwork drilling and mining, etc., can solve problems such as time-consuming and difficult stress state, and achieve the effect of accurate monitoring, high accuracy, and little impact on production

Inactive Publication Date: 2008-04-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These conventional monitoring and forecasting methods are mainly contact-based, labor-intensive and time-consuming, and it is difficult to directly and accurately measure the stress state in front of the working face

Method used

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  • Method for monitoring mine rock stress state by electromagnetic radiation method
  • Method for monitoring mine rock stress state by electromagnetic radiation method
  • Method for monitoring mine rock stress state by electromagnetic radiation method

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Experimental program
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Embodiment Construction

[0025] A preferred embodiment of the present invention is to use the electromagnetic radiation monitoring system to monitor the electromagnetic radiation signal of the mine strata, and analyze the stress of the mine strata according to the coupling relationship between the electromagnetic radiation signal of the mine strata and the stress state of the mine strata, and the monitored electromagnetic signal. state.

[0026] Such as figure 1 As shown, the described electromagnetic radiation monitoring system includes a sensor 1, a monitor 3, a signal line 4 is connected between the sensor and the monitor monitor, and a push-pull rod 2 is connected to the sensor 1 for pushing the sensor into the Or pull out the monitoring hole. The electromagnetic signal sensor 1 is capacitive, and the main technical parameters of the test system are:

[0027] Antenna sensitivity: 50μV / m;

[0028] Receiver input signal: Vpp≥2μV;

[0029] Working voltage: 12±0.5V;

[0030] Working current: not ...

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Abstract

The present invention discloses electromagnetic radiation method for monitoring the stress status of mine. Electromagnetic radiation signal of rock stratum in mine is monitored with one electromagnetic radiation monitoring system and applied in analyzing the stress status of rock stratum in mine based on the corresponding relation between the electromagnetic radiation signal and the stress status of the rock stratum. The electromagnetic radiation monitoring system includes sensors, and one monitoring instrument. The sensor has one push-pull rod connected to detect the stress status in different area in the mine. The method is practical, accurate and suitable for various kinds of mine, especially coal mine.

Description

technical field [0001] The invention relates to a mine safety mining technology, in particular to a method for monitoring the stress state of mine rock formations. Background technique [0002] At present, the stress state and the distribution of the "three areas" of the coal and rock in front of the working face and on both sides of the roadway in the mine, especially in the coal mine field, are generally speculated based on empirical theory, and rarely determined by actual measurement. For mine pressure monitoring, dynamic strain gauges or mine pressure gauges are generally used to test parameters such as roof sinking, sinking speed, and pillar load. The bolt roadway uses a combination of force-measuring bolts and static resistance strain gauges to measure the stress state of the roadway. Monitor. The conventional forecasting work of the roof pressure on the coal mining face is to arrange measuring stations in the working face, in the roadway and on both sides of the work...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C39/00
Inventor 何学秋聂百胜
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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