Gas extraction drilling hole injection expanding type bag hole sealing device

A gas drainage and hole sealing device technology, which is applied in gas discharge, mining equipment, earthwork drilling, etc., can solve the problems of poor sealing effect and complicated operation, and achieve reliable sealing effect, simple operation and improved reliability Effect

Inactive Publication Date: 2015-02-11
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide a gas drainage drilling injection bladder sealer with convenient operation and reliable sealing effect, so as to solve the problems of poor sealing effect and complicated operation in the prior art

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  • Gas extraction drilling hole injection expanding type bag hole sealing device
  • Gas extraction drilling hole injection expanding type bag hole sealing device

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Embodiment Construction

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0017] As shown in the figure, the gas drainage drilling inflation type bladder sealer of the present invention at least includes two sealing bladders 7 for sealing coal seam boreholes 12 and a gas extraction pipe 1 passing through its inner cavity, The grouting pipe 8 and the grouting pipe 11, the present embodiment preferably adopts two sealing pockets 12, and the sealing pockets 12 are arranged at the two ends of the grouting pipe 8 at intervals to form an airtight seal in the coal seam borehole 12. Space 9, when injecting the sealing slurry, the sealing bag 7 can completely seal the coal seam borehole 12, and the grouting pipe 8 is provided with a one-way blasting ...

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Abstract

The invention discloses a gas extraction drilling hole injection expanding type bag hole sealing device, and belongs to the technical field of gas extraction drilling hole grouting hole sealing. The gas extraction drilling hole injection expanding type bag hole sealing device at least comprises two hole sealing bags for sealing drilling holes in a coal bed as well as a gas extraction pipe, a grouting pipe and a slurry return pipe which penetrate through the inner cavities of the two hole sealing bags, wherein the hole sealing bags are arranged at the two ends of the grouting pipe at an interval; a closed space is at least formed in the drilling holes in the coal bed; one-way bursting valves A are respectively arranged on the passages of the grouting pipe in the hole sealing bags; a one-way bursting valve B is respectively arranged on the passage inside the closed space; the bursting pressures of the one-way bursting valves A are smaller than that of the one-way bursting valve B. By setting the hole sealing bags and the bursting valves, hole sealing slurry is injected in the hole sealing bags and the closed space between the hole sealing bags successively, the hole sealing bags are quickly expanded, and finally the bags and hole walls as well as the slurry in the closed space and the hole walls are tightly combined, so that the drilling holes in the coal bed are tightly blocked, the hole sealing effect is reliable, and the operation is simple.

Description

technical field [0001] The invention relates to the technical field of gas drainage drilling and grouting sealing, in particular to an inflatable bladder hole sealing device for gas drainage drilling in coal mines. Background technique [0002] Borehole gas drainage is the main technical means for the prevention and control of coal mine gas disasters and the development and utilization of coalbed methane. In coal mine gas drainage work, the drilling sealing technology has always been a difficult problem restricting gas drainage. Cement mortar plugging, polyurethane foam plugging, gas drainage plugging device plugging, pneumatic expansion capsule plugging, etc. Cement mortar plugging technology is widely used in domestic mines. This technology has the characteristics of fast sealing speed and good initial effect. However, ordinary cement mortar shrinks significantly after solidification, and cracks between cement and coal walls are easy to form air leakage channels, which aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21F7/00
CPCE21B33/13E21F7/00
Inventor 文光才赵旭生周厚权刘延保杨利平申凯刘桢熊伟郭平马代辉郭寿松王小朋乔伟
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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