Coal mine gas extraction double-injection hole sealing device
The design of the dual-injection sealing device for coal mine gas extraction has enabled secondary sealing of the slurry and negative pressure venting, solving the problems of insufficient slurry solidification and mining-related impacts, and improving the effectiveness and stability of gas extraction.
CN224093370UActive Publication Date: 2026-04-07HENAN LONGYU ENERGY +1
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Patent Information
- Application Number
- CN202521061499.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-07
- Estimated Expiration
- 2035-05-27
AI Technical Summary
Technical Problem
In existing borehole plugging technologies, the grout solidifies poorly, resulting in reduced plugging effectiveness. Furthermore, it is susceptible to air leakage due to mining activities, which affects gas extraction efficiency.
Method used
A dual-injection sealing device for coal mine gas extraction is adopted. The initial sealing section is formed by the first main bladder and the second main bladder, and the second auxiliary bladder is used for secondary sealing. Combined with negative pressure venting and telescopic bladder venting, the slurry is compacted and the sealing effect is achieved.
Benefits of technology
It improved the compressive strength of the slurry, prevented a decrease in the sealing effect, and enhanced the stability and efficiency of gas extraction.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model discloses a coal mine gas extraction double-injection hole sealing device which comprises a first main bag body, a second main bag body and a first pipeline, and the first pipeline provides slurry for the first main bag body and the second main bag body to enable the first main bag body and the second main bag body to expand and make contact with the hole wall. The device further comprises a first auxiliary bag body, a second auxiliary bag body and a second pipeline, the first auxiliary bag body is attached to the first main bag body and is close to the hole opening, and the second auxiliary bag body is attached to the second main bag body and is close to the hole bottom. The second pipeline provides slurry for the first auxiliary bag body and the second auxiliary bag body so that the first auxiliary bag body and the second auxiliary bag body can expand to make contact with the hole wall, and a first explosion valve and an exhaust part are arranged on the second pipeline and located at the plugging section. And one end of the second pipeline is respectively connected with the second grouting pipe, the exhaust pipe and the slurry discharge pipe in a switching manner. According to the utility model, secondary plugging can be carried out on the plugging section of the drill hole, the problems of plugging effect reduction and air leakage caused by the influence of mining are avoided, gas extraction is guaranteed, and the compressive strength of solidified slurry can be improved.
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