A technology and device for pre-injecting colloid to seal drainage boreholes in soft coal seams
A technology for extracting drilling holes and soft coal seams. It is used in safety devices, sealing/sealing, mining equipment, etc. It can solve problems such as easy drying and cracking, solid phase particle size matching, etc. directional effect
Inactive Publication Date: 2017-01-18
NORTH CHINA INST OF SCI & TECH
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Problems solved by technology
Although high-water materials can be injected into the coal fissures around the borehole, they are prone to drying and cracking; the size of solid phase particles in the secondary sealing method is difficult to completely match the size of the fissures
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[0023] In the figure, a pre-injected gel seals the soft coal seam drainage and drilling device, which includes a front capsule 1, a middle capsule 2 and a rear capsule 3 connected in sequence. The front capsule 1 and the rear capsule 3 are formed by injection The liquid rubber tube 5 is connected, and the back capsule 3 is connected to the liquid injection pump 8 by the liquid injection hose 5; the middle capsule 2 is provided with a liquid injection hose 5, and the liquid injection hose 5 axially penetrates the back capsule 3 and the liquid injection The pump 8 is connected; the rear capsule 3 also axially passes through a grouting hose 6, and the inlet end of the grouting hose 6 is connected to the grouting pump 9; the device is also provided with a suction pipe 4, the suction pipe 4 Axially passes through the front capsule 1, the middle capsule 2 and the rear capsule 3 in turn, the outer end of which is connected to the suction pipe 7; the suction pipe 4 is connected to the f...
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The invention relates to a process and device for pre-grouting rubber matrix to seal a soft coal seam gas drainage borehole. The device comprises a front section capsule, a middle section capsule and a rear section capsule which are connected in sequence. The front section capsule and the rear section capsule are communicated by a liquid filling rubber tube, and the rear section capsule is connected to a liquid filling pump by a liquid filling rubber tube. A liquid filling rubber tube is arranged on the middle section capsule, and the liquid filling rubber tube axially penetrates through the rear section capsule to be connected with the liquid filling pump. A grouting rubber tube further axially penetrates through the rear section capsule, and the liquid inlet end of the rear section capsule is connected with a grouting pump. The device is further provided with an extraction tube which sequentially and axially penetrates through the front section capsule, the middle section capsule and the rear section capsule, and the outer end of the extraction tube is connected with an extraction pipeline. The extraction tube is in sealing connection with all the capsules through sliding sealing connectors. According to the process and device, compact filling is conducted in the whole extraction process, the gas leakage phenomenon is avoided, and the sealing effect of the gas drainage borehole is effectively improved. The process and device are suitable for sealing rock drill holes and hard coal seam holes, and particularly suitable for sealing the soft coal seam gas drainage borehole, and has the advantage of being wide in application range.
Description
Technical field [0001] The invention relates to a process and device for sealing a coal seam extraction drilling hole, in particular to a process and a device for pre-injecting a colloid to seal a soft coal seam extraction drilling hole. Background technique [0002] At present, the commonly used gas prevention and control measures mainly include ventilation and drainage. Among them, drainage is a fundamental measure to prevent gas disasters. "Coal Mine Safety Regulations" (revised edition in 2011), "Provisions on Prevention and Control of Coal and Gas Outburst", "Interim Regulations on Meeting Standards for Coal Mine Gas Drainage" and "Code for Design of Coal Mine Methane Drainage Engineering", etc. Clearly defined. [0003] Compared with rock formations and hard coal, the poor sealing of boreholes leads to abnormally low gas drainage concentration. Taking the Zhengzhou mining area as an example, the second 1 The current mining area of the coal seam is exactly this typical out...
Claims
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IPC IPC(8): E21B33/12E21F7/00
CPCE21B33/12E21F7/00
Inventor 齐黎明葛须宾
Owner NORTH CHINA INST OF SCI & TECH