Coal mine working face detecting method with cutting vibration as seismic signal

A technology of seismic signal and detection method, which is applied in seismic signal processing, seismology for logging records, etc., can solve the problem of insufficient safety of explosives, and achieve the effect of high source energy

Inactive Publication Date: 2012-11-21
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

However, the channel wave exploration method still has some limitations: the coal mining operation needs to be suspended during the detection; an artificial seismic sou

Method used

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  • Coal mine working face detecting method with cutting vibration as seismic signal
  • Coal mine working face detecting method with cutting vibration as seismic signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Arrange geophones on the side walls of the return air lane and Yunshun lane ( figure 1 ), the geophone is connected to the center of the coal seam or close to the center of the bolt outcrop with a specially designed butt joint, and the surroundings are tightened and fixed with nuts. The distance between the geophones is generally 11m.

[0034] 2) After the geophones, large wires, instruments, etc. are laid out, when the shearer starts cutting work, the recording system is started, and the data is transmitted to the processor in real time.

[0035] 3) To process the data, first establish the observation system ( figure 1 ), using seismic interferometry technology to convert mechanical noise into effective seismic signals, and do preliminary processing on the data: adaptive filtering, eliminating roadway surface waves; seismic interferometry processing, converting continuous vibration signals into pulse signal shots; bandpass filtering, Separation of groove waves with...

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Abstract

The invention relates to a coal mine working face detecting method with cutting vibration as a seismic signal. The coal mine working face detecting method with the cutting vibration as the seismic signal comprises the following steps: (1) data acquisition, (2) data processing, and (3) data interpretation: by directly using a transmission coefficient, large tectonic faults, such as wrong coal seam faults and collapse columns which can block trough wave transmission, can be judged; according to an CT (computed tomography) image, collapse columns, old kiln laneway and the like which cannot block a trough wave but can cause change of the wave speed can be confined; and a tectonic interpretation diagram of a working face can be comprehensively drawn. After adoption of the method, the coal mining operation is not disturbed; a detector is installed on the side wall of a laneway, without any influence on normal operation of a coal mine; during data acquisition, the coal mining operation is not required to be interrupted; a seismic source is high in energy and free of noise; when a coal mining machine cuts a coal seam, a strong seismic wave is emitted and can also be accumulated through superposition within a certain time period; the energy is high because a strong noise is converted into a strong signal; and an obtained single shot record is very clear, almost without any noise.

Description

technical field [0001] The invention belongs to the technical field of advanced exploration of underground working faces in coal mines, and relates to a method for detecting coal mine working faces using cutting vibrations as seismic signals. Background technique [0002] The real-time detection of small abnormal structures such as gobs, small faults, and collapse columns inside the coal mining face is very important for preventing disasters and accidents and setting up economical and reasonable coal mining schemes. The existence of small structures such as gobs and faults destroys the continuity of the coal seam, affects the stability of the surrounding rock of the shaft, and will form a good water-conducting channel (especially the collapse column) or a gas storage place, which becomes the roof and floor of the coal seam. Potential hazards of water and gas inrush. With the development of mechanized coal mining in mines, the obstruction of coal mining machinery by faults a...

Claims

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Application Information

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IPC IPC(8): G01V1/40G01V1/48
Inventor 程建远陆斌胡继武覃思
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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