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A Multi-information Coupling Prediction Method for In-situ Stress Type Rockburst Hazard

A technology of rock burst and multi-information, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of unable to monitor the stress value of coal body in real time, destroying the mechanical structure of coal body, complicated operation, etc., and achieve good results Applicability, simple operation, and the effect of improving accuracy

Inactive Publication Date: 2017-12-26
CHINA UNIV OF MINING & TECH
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Problems solved by technology

The traditional method of monitoring the stress value in the coal body is complicated to operate, and can only monitor the stress value of a local point, and cannot monitor the stress value in the entire coal body in real time, and destroys the mechanical structure of the coal body

Method used

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  • A Multi-information Coupling Prediction Method for In-situ Stress Type Rockburst Hazard
  • A Multi-information Coupling Prediction Method for In-situ Stress Type Rockburst Hazard
  • A Multi-information Coupling Prediction Method for In-situ Stress Type Rockburst Hazard

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] Such as figure 1 Shown, concrete steps of the present invention are:

[0020] (1) Test the stress value in the coal body in the impact dangerous area by using the drilling cuttings method or the stress gauge method, then draw the stress distribution curve, and obtain the distribution of the stress gradient by deriving the distance. The specific formula is:

[0021]

[0022] In the above formula: ΔS is the stress point σ 1 and the stress point σ 2 The distance between , Δσ is the stress gradient;

[0023] (2) Shoot or hit the coal wall on one side of the coal body in the impact dangerous area, receive it through the pick-up device on the other side, and then perform CT tomography to obtain the wave velocity distribution in the coal body. By deriving the distance, The distribution of the wave velocity gradient is obtained, and the specific formula is:

[0024] ...

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Abstract

The invention discloses a multi-information coupling prediction method for ground stress type rock burst risk. One side of the coal is blasted or hits the coal wall, and it is received by the pickup on the other side, and then CT tomography is used to obtain the distribution of the wave velocity gradient; (3) due to the coupling between the stress gradient and the wave velocity gradient, By determining the critical value of the stress gradient of the rock burst in the coal body, the critical value of the wave velocity gradient VGm is obtained; (4) In the process of coal mining, the wave velocity gradient VG in the coal body is obtained in real time through the formula; (5) The real-time The detected wave velocity gradient VG is compared with the wave velocity gradient critical value VGm. If VG is less than VGm, the prediction result is safe; if VG is greater than VGm, the prediction result is dangerous. It can predict the risk of rock burst in real time, and fully obtain the information of the outburst risk of rock burst.

Description

technical field [0001] The invention relates to a method for predicting the risk of rock burst, in particular to a multi-information coupling prediction method for the risk of ground stress type rock burst. Background technique [0002] In recent years, with the demand of economic development, mining has developed to the deep, and the geological conditions are complex, and the frequency of rock bursts is increasing. In the northwest region, although the mining depth is relatively shallow, rock burst accidents still occur many times. Rockburst is the sudden release of stress energy accumulated in the coal and rock mass around the roadway and stope, throwing the coal rock to the roadway, and making a strong sound at the same time, causing vibration and destruction of the coal rock mass, damage to supports and equipment, casualties, and some Roadway collapse damage and other dynamic phenomena. Rockburst can also cause or may cause other mine disasters, especially gas and coal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 陆菜平刘广建刘洋刘鹏飞王洪宇
Owner CHINA UNIV OF MINING & TECH
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