Single-capsule hole sealing device and method for underground coal mine drilling

Abstract

The invention discloses a single-capsule hole sealing device and method for underground coal mine drilling. The hole sealing device comprises a capsule body produced by elastic materials and is characterized in that a diaphragm is arranged in the capsule body to separate the internal space of the capsule body into two independent cavities, the two independent cavities are respectively prefilled with chemical reactant A and chemical reactant B, and the chemical reactant A and the reactant B can release gas when the chemical reactant A and the reactant B have contact reaction; the front end of a triggering rod penetrates into the capsule body, and the rear end of the triggering rod is reserved outside a limit plate. When the capsule body is fed into a drilled hole, the triggering rod is rotated when needed to puncture the diaphragm to allow the reactant A to contact with the reactant B to have chemical reaction, and a large amount of gas is generated by the chemical reaction to allow the capsule body expand so as to squeeze a rock wall to complete hole sealing.

Description

technical field [0001] The invention relates to a single-capsule hole-sealing device and a hole-sealing method for underground coal mine drilling. 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. During the underground mining and production process, drilling operations need to be carried out, and after the work is completed, the drilling needs to be sealed. 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 hol...

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

In the field application of the traditional capsule-mucus sealer, most of them use the pump body to inject water or air into the capsule to pressurize, which not only increases labor costs, but also is inefficient and complicated to operate

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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