Coal-mine gas extraction drilling pressurized grouting rapid hole packer and use method thereof

Abstract

The invention discloses a coal-mine gas extraction drilling pressurized grouting rapid hole packer and a use method thereof. A hole packer comprises a grouting pipe and capsular bags, wherein the grouting pipe is divided into a front second and a rear section; a double-circular air pressure blast valve is arranged between the front-section and rear-section grouting pipes; the double-circular air pressure blast valve is connected with the grouting pipes on the two sides through a thread head and a withholding type rubber hose connector; the front-section grouting pipe and the rear-section grouting pipe are sleeved with a capsular bag respectively; the two ends of the capsular bag on the front-section grouting pipe are withheld and fixed on the grouting pipe through a metal sleeve; the front end of the capsular bag on the rear-section grouting pipe is withheld and fixed on the grouting pipe through a metal sleeve while the rear end is fixed on the grouting pipe through a plug; and the part of the grouting pipe surrounded by the two capsular bags is provided with an annular one-way valve. In the coal-mine gas extraction drilling pressurized grouting rapid hole packer, airtight hole sealing is realized by the pressurized grouting technology; the hole packer has the advantages of multi-layer pressurized grouting and strong hole sealing airtightness; and moreover, the whole structure is simpler, the hole sealing operation is simpler and more reliable, and the airtight effect is better.

Description

technical field [0001] The invention relates to the technical field of coal mine gas drainage drilling, in particular to a pressure grouting fast hole sealing device for coal mine gas drainage drilling and a method for using the same. Background technique [0002] Existing coal mine gas drainage drilling technology: 1. Polyurethane sealing technology: Domestic coal mine gas drainage drilling generally adopts polymer polyurethane chemical materials to seal holes. [0003] 2. Mechanical elastic sealing technology. [0004] 3. Inflatable hole sealer: There are two main types of inflatable hole sealer, one is the non-inflatable airbag type, and the other is the inflatable airbag type. [0005] 4. Hydraulic expansion type hole sealer. [0006] 5. Coal mine gas pressure fast grouting hole sealing device. [0007] Defects of the above prior art: 1. Polyurethane sealing technology: this sealing method has two disadvantages: first, low compressive strength; second, large compressi...

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Problems solved by technology

[0007] The defect of above prior art: one, polyurethane sealing technology: this sealing method has the shortcoming of two aspects: the first, compressive strength is low; Second, compressible amount is very big

[0008] 2. Mechanical elastic hole sealing technology: This sealing method has poor sealing performance on the borehole and serious air leakage, so it cannot be used for long-term drainage of coal seams.

[0009] 3. Inflatable hole sealer: it can only be used as a temporary hole sealer

[0010] 4. Hydraulic expansion type hole sealer: This kind of hole sealing is not feasible for l

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