Secondary Grouting Sealing Device and Sealing Method for Through-the-shoulder Single-capsule Bag

Abstract

The invention relates to a single-bag sealing integrated hole-sealing device, which includes a double-layer bag, a grouting tube, a plugging tube, a hole-sealing tube, a grouting tie, a plugging tie, a cloth cover for fixing the outlet of the plugging tube, The end of the plugging pipe is fixed with a cloth cover, the grouting rope cloth cover, the plugging rope cloth cover, the one-way valve and the plug. The double-layer bladder is wrapped outside the sealing tube. Grouting tie rope and a plugging tie rope, at least one grouting hole is arranged on the outer surface of the double-layer bag on both sides of the grouting tie rope, the grouting pipe and the sealing pipe are distributed in parallel, and the grouting pipe is embedded in the grouting cavity The inside is connected with the grouting cavity through at least four one-way valves, the plugging pipe body is embedded in the double-layer bladder, and the front end is located on the outer surface of the double-layer bladder and connected with the plug. On the one hand, the present invention improves the solidification efficiency of the slurry, and effectively eliminates the air holes in the slurry block caused by the solidification and shrinkage of the slurry; Secondary blocking operation.

Description

technical field [0001] The invention relates to the field of underground gas drainage in coal mines, in particular to a threaded single-bag secondary grouting sealing device and a hole sealing method in the coal seam gas drainage. Background technique [0002] High-quality sealing of coal seam boreholes is a key technology for gas drainage, which directly affects the concentration of underground coal seam gas drainage. Patent CN201610215651.1 discloses a central grouting type single bladder bag grouting sealing device and its sealing method. The device has weak grouting ability to the borehole wall and can only realize one-time grouting of the borehole. Patent CN200710054384.5 discloses a bag-type grouting sealing device and its sealing method. Although the sealing device has achieved a certain application effect, it can only realize one-time grouting of the drilled hole. Patent CN201721649952.6 discloses a bag-type grouting sealer. The sealing device consists of two double...

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Problems solved by technology

Patent CN200710054384.5 discloses a bag-type grouting sealing device and its sealing method. Although the sealing device has achieved a certain application effect, it can only realize one-time grouting for drilling

Patent CN201721649952.6 discloses a bag-type grouting sealer. The sealing device consists of two double-layer bags, a grouting pipe, and a steel ring. In the process, the material secretes a large amount of water and exists between the two bladders, which increases the water-cement ratio of the slurry between the two bladders, seriously reduces the material performance, makes the material shrink after curing, and causes air leakage in the drilled hole

Patent CN201721698524.8 and patent CN201711294128.3 respectively disclose two-sack and three-sack plugging plugs, which can realize the functions of drilling, grouting and plugging, but the above two plugs have strong water permeability. During the grouting process, a large amount of water tends to accumulate between the two bladders, resulting in an imbalance in the water-cement ratio of the material in the grouting section, thereby reducing the sealing effect

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