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Down-hole mining space top board separation layer prealarming method

A roof delamination and delamination technology, applied in mining equipment, mining equipment, earth square drilling and mining, etc., can solve problems such as unseen

Inactive Publication Date: 2008-08-13
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

At present, there are no reports of similar research at home and abroad in this area.

Method used

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  • Down-hole mining space top board separation layer prealarming method
  • Down-hole mining space top board separation layer prealarming method
  • Down-hole mining space top board separation layer prealarming method

Examples

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Embodiment Construction

[0020] Further illustrate the method of the present invention according to the concrete implementation of certain mine below.

[0021] Example: The coal seam thickness of a mine is 2.8 meters, the roof is 1.6 meters of siltstone and 3.0 meters of medium-grained sandstone from bottom to top, the roadway width is 4 meters, and the height is 2.8 meters. In order to accurately predict the roof delamination, the delamination telemetry monitoring system is installed on the ground, the 1# delamination sensor is installed 2 meters in the middle of the roadway, and the 2# delamination sensor is installed 0.2 meters away from the right side (such as figure 1 shown). It is set to collect data every 10 minutes. After receiving the displacement data, the abscission telemetry monitoring system saves them into data files and processes them. When processing, proceed according to the second step in the technical scheme, the processing process is as follows Figure 4 As shown, an alarm is iss...

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Abstract

The present invention discloses a warning method for underground fossick space top board, relates to method of stope of coal mines working surface top board and alley way top board breakaway. Absciss layer velocity ratio Lambadan is mainly used as warning index to warning by judging if one the time absciss layer velocity ratio exceed terminal absciss layer velocity ratio. Because absciss layer velocity ratio Lambadan is unchangeable in same rock formation and different tunnel place, this can avoid affection to top board breakaway warning result caused by different absciss layer sensor place in fossick space, and insure equivalence character of absciss layer monitoring warning at all place which is possible to generating absciss layer, and improving absciss layer prophesy accuracy.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, in particular to a method for caving the roof of a coal mining working face and the roof of a roadway. Background technique [0002] During the mining of the coal mining face and the excavation of the roadway, when the roof is suspended to a certain area, the roof will fall, causing casualties. Usually, the most dangerous roof thickness is the lower part of the roof in the range of 3 to 5 meters, and it is generally necessary to predict the fall of this part of the roof. [0003] At present, the forecast and monitoring instruments for roof abscission include mechanical type (manual reading), electromagnetic conversion type (automatic timing reading and data storage, manual access to extension) and abscission telemetry monitoring system (automatic timing reading and storage data, automatic transmitted to the ground computer), these monitoring methods play an active role in preventing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18
Inventor 谭云亮赵同彬
Owner SHANDONG UNIV OF SCI & TECH
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