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Bag type paste injection hole sealing device and its hole sealing method

A technology of sealing device and bag, which is applied in the direction of safety device, sealing/seal, earthwork drilling, etc. It can solve the problems of large compressibility, influence on gas drainage concentration and drainage effect, and inability to effectively control drilling. Problems such as hole deformation and damage

Inactive Publication Date: 2010-05-19
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Downhole boreholes will be deformed and destroyed under the influence of ground stress. Foam materials such as foamed polyurethane and foamed cement have low strength and large compressibility, which cannot effectively control the deformation and damage of boreholes, making the sealing section A large number of crack gas leakage channels are generated around the borehole, which affects the concentration and drainage effect of gas drainage
The air leakage phenomenon of the mechanical sealing method used for temporary sealing is more serious, but due to the short extraction time (several hours), generally do not make too high requirements

Method used

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  • Bag type paste injection hole sealing device and its hole sealing method
  • Bag type paste injection hole sealing device and its hole sealing method
  • Bag type paste injection hole sealing device and its hole sealing method

Examples

Experimental program
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Effect test

example 1

[0017] Such as figure 1 As shown, the pouch-type grouting and sealing device includes a pouch 1 and a extraction tube 9 passing through the pouch 1 , and the extraction tube 9 is equipped with an inner support 2 and an outer support 4 . The pouch 1 is made of elastic thin-walled material composed of sleeve cloth (thread cloth) and rubber, latex or other elastic materials, and can also be replaced by an existing expansion rubber tube on the market. The rubber makes the pouch 1 have sealing performance. The threaded cloth makes the pouch 1 have better tensile performance, and one or more layers of threaded cloth can be added separately on the outside of the pouch 1 to increase the tensile capacity of the pouch 1 . One end of the pouch 1 is fixed on the inner support member 2, the other end of the pouch 1 is fixed on the outer support member 4, and the middle part of the pouch 1 is fixed on the middle support member 3, which can be fixed by glue bonding or Secure with ties or ho...

example 2

[0021] Such as figure 2 As shown, this embodiment and figure 1 The shown embodiment 1 is basically the same, the difference is that figure 2 The shown middle support member 3 is no longer a plastic or metal part, but an expansion control ring 4 that controls the expansion of the middle part of the bladder bag 1 is compounded in the middle of the bladder bag 1. The expansion control ring 4 is a flexible sleeve made of fiber. The expansion of the expansion control ring 4 is smaller than that of the bladder 1, the expansion control ring 4 is bonded on the bladder 1 to control the expansion of the bladder 1, and the slurry control valve 5 is installed on the expansion control ring 4. The method step of sealing hole is the same as embodiment 1.

example 3

[0023] Such as image 3 As shown, this embodiment and figure 1 The shown embodiment 1 is basically the same, the difference is that the inner support member 2, the middle support member 3 and the outer end support member 4 are connected as a whole by bonding or screw connection, and the middle support member 3 penetrates into the inside of the pouch body , the two ends are respectively connected with the inner end support 2 and the outer end support 4, and the middle support 3 covered by the pouch 1 is radially opened with a slurry outlet 13. The two ends of the middle support member 3 can also leave a gap with the inner support member 2 and the outer support member 4 to form a slurry outlet. The method step of sealing hole is the same as embodiment 1. The cost of this embodiment is higher than that of Example 1 and Example 2, but it can reduce the axial tensile force of the bladder 1 and has certain advantages when the grouting pressure is relatively high.

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Abstract

The present invention relates to a bag type paste-injecting hole-sealing equipment and its hole-sealing method. Said bag type paste-injecting hole-sealing equipment includes the following several portions: bag, internal end supporting component, middle portion supporting component, external end supporting component, paste injection control valve, reverse check valve and pressure control pin. Besides, said invention also provides the concrete steps of said hole-sealing method.

Description

technical field [0001] The invention relates to a hole-sealing device and a hole-sealing method for gas drainage drilling in coal mines, in particular to a permanent hole-sealing suitable for drilling holes in an underground coal seam in a coal mine. Background technique [0002] The depth of boreholes for underground drainage is generally 30 meters to hundreds of meters, and only a certain distance from the hole is sealed, and direct grouting cannot be used to seal the holes. Sealing is divided into permanent sealing and temporary sealing. At present, the known permanent sealing of drilling holes for gas drainage in this coal seam uses foamed polyurethane, foamed cement and other foaming materials as sealing materials. The early "cement roll sealing device" (ZL90227075.3) It is no longer used, and the drilling and grouting sealing method is rarely used due to the inconvenience of operation. At present, foamed polyurethane materials are generally used to seal holes in China...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/138E21F7/00
Inventor 孙玉宁
Owner HENAN POLYTECHNIC UNIV
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