A multi-capsule hole sealing device for drilling underground coal mines and a hole sealing method thereof

Abstract

The invention discloses a coal mine down-hole multi-capsule hole sealing device for drilling and a hole sealing method thereof. The device comprises baffles at the two ends of the device, a plurality of hole sealing capsules are arranged between the baffles at the two ends of the device in a spaced mode and connected through a compact screening net to form a mucilage cavity, and the mucilage cavity is pre-filled with mucilage. A separating film dividing the inner space of a capsule body into two separate chambers is arranged in each hole sealing capsule, every two corresponding separate chambers are pre-filled with chemical reaction products A and B which can make contact with each other to react to release gas correspondingly, and screw holes communicating with the insides of capsule bodies are formed in the capsule bodies. The front end of each triggering rod penetrates through the corresponding screw hole and extends into one chamber of the corresponding capsule body, and the rear end of each triggering rod is reserved outside the corresponding capsule body and wound with a traction wire. The traction wires are pulled to enable the triggering rods to rotate to puncture the separating films, thus the reaction products A and B in the hole sealing capsules make contact with each other to react to generate a lot of the gas so that the capsules can expand towards the radial direction to squeeze rock walls and expend towards the middles to squeeze mucilage, and after the mucilage is squeezed, the spaces reserved between the drill hole walls and fractures in the drill hole walls are tightly blocked.

Description

technical field [0001] The invention relates to a multi-capsule hole sealing device and a hole sealing method for underground drilling in coal mines. Background technique [0002] my country is rich in coal resources, has strong economic and social needs, and has great long-term development potential. However, during the development process, due to special work forms and environments, disasters such as gas, roof, water, fire, and coal dust still require us to deal with them. face and deal with. Among coal mine accidents, gas accidents are the most serious, accounting for more than 30% of the total accidents in coal mines. Effective prevention and control of gas explosion disasters in coal mines has special significance and practical urgency for the production pattern of the coal industry in which more than 90% of the existing coal mines in my country are underground mining. [0003] Over the years, many scientific researchers at home and abroad have done a lot of work to so...

AI Technical Summary

Problems solved by technology

The current sealing technology mainly includes solid material sealing, including clay sealing and cement mortar sealing: clay sealing has certain limitations, and the sealing operation links adopted indirectly limit the sealing length. The final sealing Unsatisfactory airtightness leads to unsatisfactory effect of sealing hole pressure measurement

The cement mortar sealing technology also has certain shortcomings. The equipment used for the cement mortar pressure measurement cannot be recycled for the next pressure measurement after the pressure measurement; the hole sealing device includes rubber ring-mucus, capsule-mucus and polyurethane foam- Several types such as mucus: The sealing principle adopted by the apron mucus sealer is simply that solid seals liquid and liquid seals gas. Although this method has a better pressure measurement effect, it also has defects, and the pressure measurement time is average. is relatively long

Capsule-mucus hole sealer has the disadvantages that the sealing capsule is easy to spray out from the drill hole in the field, causing casualties and property losses, and there may be capsule hole jamming incidents and other defects

The disadvantage of polyurethane foam-slime sealing is that the expansion effect of the polyurethane material is not easy to control within a reasonable range, so it needs to be sealed several times to complete the sealing and achieve a better sealing effect, which provides the pressure measurement process Complete Pressure Measurement Environment

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