System for monitoring gob stress in real time and overlying strata breakage judgment method

A real-time monitoring system and goaf technology, applied in signal transmission system, force/torque/power measuring instrument, measuring device, etc., can solve the problem of less stress monitoring in goaf and achieve long sustainable working time , Guaranteed reliability, real-time uninterrupted data transmission effect

Active Publication Date: 2013-02-13
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] At present, the borehole stress gauge is mainly used to monitor the leading sup

Method used

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  • System for monitoring gob stress in real time and overlying strata breakage judgment method
  • System for monitoring gob stress in real time and overlying strata breakage judgment method
  • System for monitoring gob stress in real time and overlying strata breakage judgment method

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Example Embodiment

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

reference figure 1 with figure 2 In the goaf stress real-time monitoring system of the present invention, first select a plurality of goaf vertical sections in the goaf D at an interval of about 20 meters ， figure 1 Two of them are shown in A-A section and B-B Section , Arrange two stress measurement points 1 on the two selected sections, one of which is close to the roadway, and the other is far away from the roadway and close to the middle of working face E. As the working face advances, select a new goaf section and arrange it at the same position Two stress measurement points 1, the distance between two adjacent sections is about 20 meters; each stress measurement point 1 is embedded with a hydraulic pillow 7, which is connected to a pressure sensor 8, and the pressure sensor 8 and wireless sensor transmitter Module 9 is connected to transmit the stress signal; reference im...

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Abstract

The invention discloses a system for monitoring gob stress in real time and an overlying strata breakage judgment method. According to the system, a hydraulic sleeper is buried in each stress measuring point and is connected with a pressure sensor; the pressure sensor is connected with a wireless sensing transmitting module; a gob stress signal is transmitted through the wireless sensing transmitting module; a wireless receiving module is arranged in a mining roadway, can simultaneously receive multi-path stress radio signals transmitted in a gob and is connected with an electro-optic conversion module; the electro-optic conversion module converts multi-path stress electric signals into optical signals and transmits the optical signals to the ground through an optical fiber; an optical fiber signal is converted into an electric signal through the electro-optic conversion module, and the electric signal is connected with a monitoring host; the gob stress data are controlled, stored and displayed on line in real time on the monitoring host through configuration control software; and after a gob stress value obtained through monitoring is compared with a theoretically calculated stress value, an overlying strata breakage position above the stress measuring points is judged.

Description

technical field [0001] The invention relates to a real-time monitoring system for goaf stress and a method for judging overburden fracture, which is suitable for real-time monitoring of stress changes in the goaf behind the mining face as the roof falls behind, and combines the stress values ​​obtained through monitoring with theoretical calculations. After comparing the stress values ​​of the goaf, the overlying rock breaking position above the goaf can be judged. Background technique [0002] With the continuous increase of coal mining depth, the underground stress environment has changed greatly, resulting in more and more serious disasters such as large deformation of the roadway, rock burst, coal and gas outburst, and water inrush. All mine stress phenomena are caused by roadway excavation, stress redistribution after coal mining, and damage and movement of rock mass structure. Only by fully understanding the distribution characteristics and evolution rules of the stre...

Claims

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Application Information

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IPC IPC(8): G01L5/00G01N33/24G08C17/02
Inventor 谢建林许家林轩大洋朱卫兵王晓振
Owner CHINA UNIV OF MINING & TECH
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