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Remote monitoring predicting method of empty zone hard top plate

A technology of hard roof and goaf, which is applied in mining equipment, mining equipment, earthwork drilling and mining, etc., can solve the problems that the roof is difficult to determine the wave peak value, caving, and there is no large-scale roof in goaf, so as to avoid errors and Other artificially inaccurate data, the effect of reliable monitoring data

Inactive Publication Date: 2009-06-03
SHANDONG UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

In Section 2.3.1 of the roof model in this paper, it was also mentioned that the "peak section of delamination velocity" was used as a forecast precursor, but it is not easy to determine the peak value for roofs with different lithologies and different thicknesses, and a large number of experimental studies are still needed to determine
Therefore, at present, it has not been used in the monitoring and forecasting of large-scale roof caving in the goaf of the mining face.

Method used

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  • Remote monitoring predicting method of empty zone hard top plate
  • Remote monitoring predicting method of empty zone hard top plate
  • Remote monitoring predicting method of empty zone hard top plate

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Embodiment Construction

[0021] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0022] 1. As shown in Figure 1, along with the mining of the coal seam 5 in the working face, a row of boreholes 7 are drilled on the roof 14 at intervals of 20 meters along the inclination direction of the working face 5 near the rear row of pillars of the working face 5. The depth of the hole exceeds the thickness of the hard top plate, and as shown in Figure 2, a separation layer sensor 10 is installed. The four sensing points of the separation layer sensor 10 are distributed at the bottom reference point 11, the deep part 12 measuring point, the shallow part measuring point 13 and the hole bottom reference point 11. On the surface of the mouth, the positions of the deep measuring point 12 and the shallow measuring point 13 are determined according to the difference in stratification of the roof strata.

[0023] Every 20 meters that the working face 5 advance...

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Abstract

A broadcasting method of worked-out section hard roof by remote sensing means includes forming remote sensing network by drilling hole line with interval distance of 15-25 m near last row support at heading stope then erecting transducer and extension sets being all connected to ground host computer in return air and transportation tunnels, repeating said process when each 15-20 m of working face is pushed on, processing collected signals to be separation layer speed by host computer, issuing alarm of roof inbreak by both host computer and extension sets when separation layer valve displayed by any transducer is over threshold.

Description

technical field [0001] The invention belongs to the technical field of coal mining, in particular to the monitoring of the roof caving of the coal mining working face. Background technique [0002] In coal mining, when the roof is suspended to a certain area, the roof will fall. When the roof falls, it will impact the supports or pillars that maintain the safe space of the mining face. The harder the roof, the greater the impact damage to the support or pillar, and sometimes it will smash or push down the support or pillar of the mining face, causing casualties. Usually, the most dangerous roof thickness is the direct roof of the lower part of 3 to 5 meters. When it falls in a large area, it will cause great harm. [0003] For the monitoring and prediction of the roof caving of the mining face, there are usually the following three methods: one is to set up a measuring line every 10 to 30 meters along the inclination direction of the mining face, and manually observe the c...

Claims

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Application Information

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IPC IPC(8): E21F17/18
Inventor 谭云亮何孔翔闫相宏马植胜
Owner SHANDONG UNIV OF SCI & TECH
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