Penetrating-sleeve-type three-airbag plugging device and using method thereof

Abstract

The invention discloses a penetrating-sleeve-type three-airbag plugging device and a using method thereof. The penetrating-sleeve-type three-airbag plugging device comprises a first airbag, a second airbag, a third airbag, a hole sealing grouting pipe, a crack plugging pipe and a slurry guiding pipe. The three airbags are formed by sewing of elastic cloth sleeves and arranged on a gas extraction pipe in a sleeving mode. The hole sealing grouting pipe penetrates through the three airbags. A grouting opening is formed in the hole sealing grouting pipe in the airbags. The slurry guiding pipe penetrates through an inner hollow body of the second airbag. The two sides of the slurry guiding pipe are connected with a grouting section in a communicating mode. The crack plugging pipe penetrates through an inner hollow body of the first airbag. The end of the crack plugging pipe is located at the sewing line position on the exterior of the second airbag. Meanwhile, the invention discloses the using method of the penetrating-sleeve-type three-airbag plugging device. According to the penetrating-sleeve-type three-airbag plugging device and the using method thereof, 'three-plugging and two-grouting' hole sealing can be achieved through a pressure sensing overflow valve, and meanwhile, further plugging of a hole circumferential crack area can be achieved after hole sealing, so that 'three-plugging and three-grouting' type hole sealing of gas extraction is achieved wholly.

Description

technical field [0001] The invention belongs to the field of hole sealing for coal mine gas drainage, and in particular relates to a sleeve-type three-bag plugging device and a method for using the same. Background technique [0002] Coal seam gas drainage is the fundamental measure for mine gas control. Lack of sealing of boreholes and gas leakage in boreholes are important factors leading to low efficiency of coal mine gas extraction, which in turn affects the overall safety of mines and the utilization of mine drainage gas. . The sealing technology of coal seam drilling is the key technical link of gas drainage. The commonly used sealing technologies include the "two plugging and one injection" sealing method using polyurethane and cement mortar as materials, polyurethane sealing method, hole sealing device sealing method, etc. hole method. Among them, the current hole sealing device and its use method include: bag-type hole sealing device and its sealing method (ZL 200...

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Problems solved by technology

Among them, the current hole sealing device and its use method include: bag-type hole sealing device and its sealing method (ZL 2007 1 0054384.5), gas drainage secondary high-pressure grouting hole sealing device and its sealing method (ZL 2009 1 0064186.6), gas drainage center split grouting sealing device and sealing method (ZL 2011 1 0120920.3), gas drainage fixed plugging device and its use method (ZL2013 1 0402234.4) and gas drainage casing Type occluder and its use method (ZL 2013 1 0405906.7), etc. The above sealing methods are to fix the pouch on the gas drainage pipe. When using the above sealing methods, the length of the sealing section is fixed , it is difficult to adjust, and generally only "two plugs and one injection" or "three plugs and two injections" can be realized, that is, the "N+1 plugging, N injection" mode of drilling is generally realized

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