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Long wall coal mining roof pressure hydraulic support resistance change characteristic pre-warning method

A hydraulic support and resistance variable technology, applied in mining equipment, mining equipment, earthwork drilling and other directions, can solve problems such as poor accuracy and poor real-time performance, and achieve the effect of preventing adverse effects, predicting in time, and ensuring life safety.

Inactive Publication Date: 2015-04-01
CCTEG CHINA COAL RES INST
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor accuracy and poor real-time performance of the pre-warning of the roof pressure on the working face of special mines, the present invention provides a method for early warning of the resistance change characteristics of the hydraulic support without looking at the roof pressure of the longwall mining face

Method used

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  • Long wall coal mining roof pressure hydraulic support resistance change characteristic pre-warning method

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Experimental program
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Embodiment 1

[0028] The method for early warning of the resistance change characteristics of the hydraulic support supported by the longwall mining roof of the coal mine uses the hydraulic support working resistance monitoring device, the pump station switch monitoring device and the hydraulic support resistance change index dynamic monitoring system to carry out early warning; the hydraulic support working resistance monitoring The device is used to record and store the monitored working resistance of the working face hydraulic support and the corresponding time in real time, and can transmit the stored data to the dynamic monitoring system of the hydraulic support resistance variable index; the pump station switch monitoring device is used to The monitored working face hydraulic support injection pump pressure end time is recorded and stored, and the stored data can be transmitted to the hydraulic support resistance change index dynamic monitoring system; the hydraulic support resistance c...

Embodiment 2

[0041] In this embodiment, the data recorded by each hydraulic support working resistance recorder is separately transmitted to the hydraulic support resistance change index dynamic monitoring system, and a resistance change index value is determined after numerical averaging.

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Abstract

The invention discloses a long wall coal mining roof pressure hydraulic support resistance change characteristic pre-warning method. A hydraulic support working resistance monitoring device, a pump station switch monitoring device and a hydraulic support resistance change index dynamic monitoring system are used for pre-warning; the hydraulic support working resistance monitoring device is used for recording and storing monitored working face hydraulic support working resistance and corresponding time in real time; the pump station switch monitoring device is used for recording and storing monitored working face hydraulic support injection pump pressure finishing time; the hydraulic support resistance change index dynamic monitoring system is used for processing and analyzing received data, marking a hydraulic support working resistance value corresponding to the working face hydraulic support injection pump pressure finishing time as hydraulic support setting load, and pre-warning about working face roof pressure according to the change of resistance change index values. Accurate and timely pre-warning about abnormal roof pressure can be realized, and normal periodic weighting length can be accurately determined in real time.

Description

technical field [0001] The invention relates to a method for early warning of pressure from the roof of a working face, in particular to a method for early warning of resistance change characteristics of a hydraulic support for roof pressure in coal mine longwall mining. Background technique [0002] The pressure from the roof of the working face is the characteristic of the mine pressure when the roof breaks in coal mining. Under normal circumstances, due to the widespread use of hydraulic supports, the pressure from the roof of the working face has little harm to coal mine production. The pressure from the roof of the working face itself It is no longer treated as a hazard, but has been brought into the scope of normal management of coal mine production. However, for special mines, the pressure from the roof of the working face may still cause serious disasters, causing casualties and equipment damage. Therefore, timely and accurate early warning of the roof pressure of th...

Claims

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Application Information

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IPC IPC(8): E21F17/18
CPCE21F17/18
Inventor 魏立科李宏杰张彬李文毕忠伟黎灵李少刚王寅
Owner CCTEG CHINA COAL RES INST
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