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Device and method for measuring expansion and deformation of protected layer
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A technology of expansion deformation and protected layer, which is applied in the field of measuring device for expansion deformation of the protected layer, can solve the problems of difficulty in fixing the base point to the design position, poor accuracy, high labor intensity, etc., and achieves wide application range and good stability , the effect of low labor intensity
Active Publication Date: 2021-10-01
HUAINAN MINING IND GRP +1
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Abstract
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is how to solve the problems of measuring the expansion and deformation of the protected layer by the deep base point method, high labor intensity, difficulty in fixing the base point to the design position, and poor accuracy.
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Embodiment 1
[0047] Such as figure 2 As shown, this embodiment discloses a device for measuring the amount of expansion and deformation of the protected layer, including a guide tube 2 arranged in the borehole 1, a first sealing bag 3, a first bag grouting pipe 4, and a casing 5. The second sealing bag 6 , the second bag grouting pipe 7 and the steel wire rope 8 .
[0048] Such as figure 2 shown, and specifically figure 2 For reference, the reference numerals 101 and 102 are the rock wall and the protected coal seam respectively; the borehole 1 is formed by drilling into the rock wall 101 with an existing drilling rig, and the bottom of the borehole 1 extends to the protected coal seam 102 above the top plate.
[0049] Such as figure 2shown, and specifically figure 2 For reference, the guide pipe 2 is arranged at the bottom of the borehole 1. The guide pipe 2 includes a circular steel pipe body 21, a first retaining ring 22 and a second retaining ring 23 that are connected togeth...
Embodiment 2
[0059] The difference between this embodiment and the foregoing embodiments is that a method for measuring the amount of expansion and deformation of a protected layer includes the following steps:
[0060] S1. On the rock wall 101, use a drilling rig, a drill pipe and a supporting drill bit to construct the drilling 1, drill the bottom of the drilling 1 to above the roof of the protected coal seam 102, and withdraw the drilling pipe and supporting drill bits;
[0061] S2. Fix the first sealing bag 3, the first bag grouting pipe 4, and the steel wire rope 8 on the round steel body 21 of the guide pipe 2, and the first sealing bag 3 is fixed on the first retaining ring 22 and the second between retaining rings 23;
[0062] S3, insert the guide pipe 2 into the inner hole of the drill pipe until the end of the drill pipe is in contact with the first retaining ring 22, and then start the drilling machine to grout the guide pipe 2, the first sealing bag 3 and the first bag The pip...
Embodiment 3
[0074] The difference between this embodiment and the foregoing embodiment is that: figure 2 As shown, the guide pipe 2 of this embodiment also includes a pointed cone 24, which is arranged on the top of the round steel body 21, and the pointed cone 24 is welded and fixed to the top of the round steel body 21, or can be integrally formed.
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Abstract
The invention discloses a device and a method for measuring the expansion deformation of a protected layer, comprising a guide tube, a first sealing bag, a first bag grouting tube, a sleeve, and a second sealing bag, which are arranged in a drilled hole. , the second bag grouting pipe and the wire rope; the present invention uses the drilling rig and drill pipe for drilling the hole to send the wire rope, the first sealing bag, the first bag grouting pipe, etc. into the position above the roof of the protected coal seam. , grouting to fix, measure the displacement of the protected coal seam roof; use the casing to fix the sealing parts, wear a wire rope, send it into the borehole under the protected coal seam floor, grouting and fix it, and measure the protected coal seam floor displacement; mining in the protective layer Then, the displacement of the top plate and the bottom plate of the protected coal seam are used to calculate the expansion deformation of the protected layer after the mining of the protective layer. The invention has low labor intensity and good safety, and can accurately reflect the changes of the roof and floor of the protected coal seam.
Description
technical field [0001] The invention relates to the technical field of coal mines, in particular to a device and method for measuring expansion and deformation of a protected layer. Background technique [0002] When mining the protective layer for the first time in the mine to investigate the protection effect and protection range, it is necessary to measure the expansion and deformation of the protected layer. The amount of expansion and deformation of the protected layer is a key parameter to measure the mining effect of the protected layer. Accurately measuring the amount of expansion and deformation of the protected layer and then mastering the law of pressure relief and permeability enhancement of the protected layer during the mining of the protected layer is of great significance for the control of gas in the protected layer. [0003] The traditional method of measuring the expansion and deformation of the protected layer is the deep base point method, that is, the c...
Claims
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Application Information
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