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Belt conveyor-based coal mine working face real-time detection system and method

A real-time detection and belt conveyor technology, applied in seismic signal processing, seismic energy generation, etc., can solve the problem of unfixed position and achieve low cost, convenient, intuitive, fast, and high efficiency

Active Publication Date: 2015-12-09
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coal shearer can also be used as a seismic source, but the disadvantage is that the position is not fixed, and it is only limited to the cutting hole

Method used

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  • Belt conveyor-based coal mine working face real-time detection system and method
  • Belt conveyor-based coal mine working face real-time detection system and method
  • Belt conveyor-based coal mine working face real-time detection system and method

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Experimental program
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Effect test

Embodiment 1

[0037] The real-time detection system and method of coal mine working face based on belt conveyor in this embodiment are mainly divided into two parts: data acquisition and transmission, and data processing, which are respectively introduced as follows.

[0038] 1. Data collection and transmission

[0039] Such as figure 1 As shown, the geophones are first arranged in the air return lane and the Yunshun lane on both sides of the working face. The return airway geophones are installed in the bottom or roof boreholes, generally 10m each. If you are concerned about problems such as roof caving or goaf water penetration, install them in the roof. If you are concerned about problems such as water inrush and gas inrush from the bottom It is installed in the bottom plate; the geophone of Yunshun Lane is installed on the anchor rod of the coal wall, fastened with an adapter, and the anchor rod is selected to be closer to the belt conveyor, so that the source signal with a higher sign...

Embodiment 2

[0048] in such as Figure 4 The method according to the invention is carried out on the shown working face which is about 300 m wide.

[0049] (1) First, a group of 54 geophones is installed on the bottom plate of the return air lane, with a track spacing of 10m; a group of 6 geophones is installed in Yunshun Lane, and the track spacing is also 10m. The geophone is arranged on the side wall of Yunshun Lane. 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 surrounding area is tightened and fixed with nuts.

[0050] (2) When the coal mining machinery starts to work, start the recording system for long-term continuous recording.

[0051] (3) Data processing: First, establish an observation system, use cross-correlation interference technology to convert mechanical noise into effective seismic signals; use deconvolution interference method to compress seismic wavelets to obtain shot s...

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Abstract

The invention belongs to the coal mine working face stress monitoring field and relates to a detection system and method, in particular, a belt conveyor-based coal mine working face real-time detection system and method. According to the system and method of the invention, a belt conveyor installed in a conveying forward direction channel at one side of the working face is adopted as a vibration source; geophones are distributed at the conveying forward direction channel and an air return channel at the other side of the working face respectively; a seismic gun set with a high signal to noise ratio can be obtained through recording vibration of a certain time span; the velocity distribution CT image of the working face can be obtained through tomography processing; the CT images of the working face at various time sections are connected with together so as to form a cloud picture varying with time; and therefore, abnormal areas of stress adjustment can be found, and early warning signals can be emitted. With the system and method adopted, long-term real-time stress scanning of the whole working face can be realized.

Description

technical field [0001] The invention relates to a detection system and method, belonging to the field of stress monitoring of coal mine working faces, in particular to a real-time detection system and method of coal mine working faces based on a belt conveyor. Background technique [0002] Coal mining will cause severe stress adjustment after hollowing out some underground coal seams. The real-time detection of stress adjustment in the working face can effectively warn disaster accidents. Geological disasters in coal mine working faces mainly include roof caving, gas outburst, and confined water outburst. The goaf loses its support, the stress is constantly readjusted, and an obvious stress concentration area is formed on the boundary of the goaf, and the floor of the goaf has upward arching stress. Strong stress changes will form cracks in the stress concentration area or the weak zone of the rock formation, and the cracks will often gradually connect with each other, even...

Claims

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Application Information

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IPC IPC(8): G01V1/04G01V1/28
Inventor 陆斌胡继武王季王保利吴海覃思
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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