System and method for monitoring dynamic disaster of coal mine with fiber bragg gratings

A fiber grating and dynamic disaster technology, applied in mine/tunnel ventilation, measuring devices, mining equipment, etc., can solve problems such as weak anti-interference ability, many underground interference factors, and difficulty in determining a reasonable drilling depth, and achieve easy prediction and prevention, strong ability to prevent external interference, and the effect of high-precision non-disturbance testing

Inactive Publication Date: 2012-11-28
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This invention relates to an apparatus that accurately detectes changes caused by environmental factors like explosion or fire without affecting its performance. By measuring tiny amounts of light from laser beams on fibers called FBG (Fibre Borrel Gratings), this technology allows for precise detection even at great distances away from any sources of radioactive rays.

Problems solved by technology

This patents describes two types of problem addressed in these fields - dynamic events involving high levels of environmental pollution and unpredictable natural occurrences (unconceited dynamics). These challenges make it hard to detect them accurately due to difficulties associated with conventional measurement systems like static electricity sensors. Existing detection techniques involve multiple sources of data fusion, including radioactive decay, nuclear magnetic resonancma identification, and laser radar imagery. However, none provide sufficient accuracy and dependability for identifying stable and safe areas within the entire range of interest.

Method used

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  • System and method for monitoring dynamic disaster of coal mine with fiber bragg gratings
  • System and method for monitoring dynamic disaster of coal mine with fiber bragg gratings
  • System and method for monitoring dynamic disaster of coal mine with fiber bragg gratings

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with specific embodiments.

[0021] Such as figure 1 As shown in the schematic diagram of the fiber grating testing system of the present invention, the fiber grating 1 is arranged inside or on the surface of the anchor rod 2, and the anchor rod 2 is implanted into the two sides of the coal mine roadway or other effective positions by the method of drilling, and is drawn out at the tail of the anchor rod 2. An optical fiber connector 11 that can be connected to the outside, the optical fiber connector 11 is connected to the fiber grating network demodulator 5, and the grating network demodulator 5 is connected to the test computer 6 to form a test system that can be used for dynamic strain monitoring.

[0022] Such as figure 2 As shown, a small groove 21 with a width of 1 mm and a depth of about 1.5 mm is opened on the surface of the metal or resin anchor rod 2 with a length of 50-100 mm, and the fibe

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Abstract

The invention discloses a system and a method for monitoring a dynamic disaster of a coal mine with fiber bragg gratings. According to the system and the method, the fiber bragg gratings (1) are distributed in or on the surface of rod bodies of anchor rods (2); the anchor robs (2) are inserted into two uppers of a roadway of the coal mine or other effective positions by drilling holes; and optical connector (11) capable of being connected with the external are introduced from the tails of the anchor rods (2), and connected with fiber bragg grating network demodulation instruments (5) which are connected to a testing computer (6) to form a testing system for monitoring the dynamic strain. With the adoption of the system and the method disclosed by the invention, the dynamic disaster can be relatively accurately forecasted, and relatively high performance of preventing outside interference can be achieved; and the method is an intrinsic safety testing method.

Description

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Claims

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Application Information

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Owner HENAN POLYTECHNIC UNIV
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