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Method for monitoring risk of rock burst

A rock burst and dangerous technology, applied in the direction of measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems of low accuracy of strain gauge monitoring results, interference of excavation and mining work, coal (rock) mass damage and other problems, to avoid drilling operations, comprehensive monitoring of anchor cable stress, and improve accuracy

Inactive Publication Date: 2019-04-02
魏全德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common local monitoring and early warning method of rock burst is to arrange stress gauges specially used for rock burst monitoring in the coal (rock) body around the shaft or working face to monitor the coal (rock) around the shaft or working face in real time. ) body stress changes, however, the above monitoring scheme will cause damage to the coal (rock) mass around the monitoring shaft or working face, making the monitoring results of the stress gauge less accurate
In addition, this kind of strain gauge requires additional drilling, which will interfere with normal excavation and mining work and affect work efficiency

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0039] In the embodiment of the present invention, a method and device for joint monitoring and early warning of rock burst by bolt and cable are proposed, which can effectively improve the accuracy of early warning of rock burst.

[0040] figure 1 A schematic flowchart of a method for monitoring the risk of rock burst according to an embodiment of the present application is shown, and the method may be executed by a rock burst monitoring device or device. The method includes the following steps:

[0041] S110, monitoring the bolt and / or the supporting stress of the bolt.

[0042] In the embodiment of the present invention, an independent support stress monitoring product or device can be manufactured to monitor the support stress of the anchor rod and / or the anchor cable.

[0043] S120, according to the support stress of the anchor rod and / or anchor cable, determine a monitoring index for evaluating the risk of rock burst.

[0044] Specifically, in this embodiment, during ...

Embodiment 2

[0050] Since the impact range and specific location of rock burst are uncertain, in order to enable monitoring indicators to accurately assess the risk of rock burst and further improve the accuracy of early warning of rock burst, the present invention takes the monitoring area as the starting point The monitoring indicators determined by the support stress are hierarchically divided.

[0051] Such as figure 2 As shown, the monitoring indicators include three levels: monitoring indicators for regional early warning (for example, driving face or mining face), monitoring indicators for section early warning, and monitoring indicators for a certain anchor rod and / or anchor cable The monitoring indicators for the early warning of the support position, that is, the monitoring indicators include: monitoring group indicators, monitoring section indicators and monitoring area indicators. Wherein, the monitoring area index includes at least one monitoring section index, and the monit...

Embodiment 3

[0059] Embodiment 3: (taking the monitoring section 2 as an example, the monitoring index of the monitoring section 2 is the maximum value or average value of all anchor rod measuring points in it, or the maximum value or average value of all anchor cable measuring points.)

[0060] In the embodiment of the present invention, the monitoring index of the anchor rod measuring point and / or the anchor cable measuring point can be used as the basic index, and the monitoring group index, the monitoring section index and the monitoring area index are determined according to the basic index.

[0061] For example, the monitoring group indicator is the average value or maximum value of the monitoring indicators of all bolt measuring points and / or anchor cable measuring points in the monitoring group.

[0062] For another example, the monitoring section indicator is an average value or a maximum value of monitoring indicators of all bolt measuring points and / or anchor cable measuring poin...

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Abstract

The present application provides a method for monitoring risk of rock burst. The method for monitoring the risk of the rock burst comprises the following steps of: monitoring the support stress of ananchor rod and / or an anchor cable; determining a monitoring index for evaluating the risk level of the rock burst according to the supporting stress of the anchor rod and / or the anchor cable; determining the hazard level of the rock burst according to the relationship between the monitoring index and the critical index of different hazard levels of the rock burst. In the embodiment of the invention, the support stress of the anchor rod and / or the anchor cable is used for the risk analysis of rock burst, and the accuracy of the warning for the rock burst can be effectively improved. Further, according to the monitoring for the rock burst based on the support stress of the anchor and / or the anchor cable, additional drilling operations and interference to the normal tunneling and mining can be avoided, the work efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a method for monitoring the risk of rock burst. Background technique [0002] Rockburst refers to the dynamic phenomenon of sudden and violent destruction of the coal (rock) mass around the coal mine roadway or working face due to the instantaneous release of elastic deformation energy, often accompanied by instantaneous displacement, throwing, and huge damage of the coal (rock) mass. Noise and blast etc. It is sudden, and there is generally no obvious precursor before it occurs. The impact process is short, and the duration is several seconds to tens of seconds. It is very destructive and is one of the major disasters in coal mines. [0003] At present, the common local monitoring and early warning method of rock burst is to arrange stress gauges specially used for rock burst monitoring in the coal (rock) body around the shaft or working face to monitor the coal (rock) around t...

Claims

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/0052
Inventor 魏全德崔金会杨光宇舒凑先魏向志崔金超魏雪
Owner 魏全德
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