Rock burst prediction method

A technology of rock burst and prediction method, which is applied in earthwork drilling, mining equipment, mining equipment, etc. It can solve problems such as difficult maintenance and management, difficult mechanical state of coal and rock mass, etc., and achieve the effect of improving accuracy

Active Publication Date: 2013-05-15
阜宁锦宇塑业有限公司
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Problems solved by technology

However, it is difficult to maintain and manage using this method, and it is difficult to analyze data and determine the mechanical state of coal and rock mass. It requires long-term experiments and the accumulation of a large amount of empirical data to accurately predict

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  • Rock burst prediction method

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Embodiment Construction

[0019] Attached below figure 1 The present invention will be further described in detail with specific embodiments.

[0020] A method for predicting rock burst, the steps are as follows:

[0021] 1) Connection detection device: connect one end of the three-dimensional vibration-picking connecting sleeve 2 to the drill pipe 3, and after confirming that the signal between the three-dimensional vibration-picking connecting sleeve 2 and the signal transceiver The other end of 2 is socketed with the coal electric drill 1, and the coal electric drill 1 is turned on for trial operation;

[0022] The three-dimensional vibration pickup connection sleeve 2 is composed of a three-dimensional acceleration sensor 22 and a connection device I21 and a connection device II23 at both ends of the three-dimensional acceleration sensor. The three-dimensional acceleration sensor 22 is provided with a wireless radio frequency transceiver chip I5; a signal transceiver 6 There is a wireless radio f...

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Abstract

The invention discloses a rock burst prediction method. According to the method, a three-dimensional vibration-picking connecting sleeve (2) is fixedly connected between an electric coal drill (1) and a drilling rod (3), the three-dimensional vibration-picking connecting sleeve (2) is used for synchronously collecting three-dimensional vibration signals of the drilling rod in the drilling process, the vibration signals are wirelessly transmitted to a signal transceiver (6) for storage through a wireless radio frequency transceiver chip (5) on the three-dimensional vibration-picking connecting sleeve (2), a spectrum curve is output at an interval time T, the first 8 orders of master frequency of each spectrum curve are recorded, a changing curve of each order of master frequency along with the drilling depth or time is output, then the number of distortion points on the changing curve of each order of master frequency along with the drilling depth or time is used for predicting rock burst tendentiousness of a coal bed, and the amount of drilling cuttings and the vibration curves obtained in drilling are combined to predict rock burst comprehensively. By means of the method, impacting phenomena of drill sucking, drill clamping and drilling are digitalized, and accuracy of rock burst prediction is greatly improved.

Description

technical field [0001] The invention relates to a method for predicting rockburst or rockburst in mines. Background technique [0002] Rockburst, also known as rockburst, refers to the dynamic phenomenon of sudden violent destruction due to the instantaneous release of elastic deformation energy of the rock mass around the shaft or working face, often accompanied by throwing of coal and rock mass, loud noise and air waves, etc. Phenomenon. It is very destructive and is one of the major disasters in coal mines. There are omens before the occurrence of rock burst, the main manifestations are: severe periodic pressure, coal wall side cuts, top and bottom ends falling, roof sinking speed increases; drill stuck when drilling pressure relief guns and pressure relief holes and suction phenomenon. [0003] Generally, rock burst occurs in the stress concentration area of ​​the mining face. The larger its peak value and the closer the peak position is to the coal wall, the greater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18
Inventor 李青锋朱川曲李树清
Owner 阜宁锦宇塑业有限公司
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