Hole sealing method based on non-Newtonian fluid material with dilatancy

Abstract

The invention discloses a hole sealing method based on a non-Newtonian fluid material with dilatancy. The material with dilatancy is adopted for sealing a blasthole. In the explosive detonation period, the hole sealing material is solidified instantly, and after detonation is completed, the hole sealing material is in a liquid state. The non-Newtonian fluid material with dilatancy has a shear thickening characteristic, and dispersion phases of nanometer silicon dioxide, corn starch, cement base and the like are taken as a thickening agent; polar solvent such as water, polyethylene glycol, polypropylene glycol, glycerinum and the like is taken as a dispersion medium. By adjusting the matching ratio of material components, a flexible plastic material bag is adopted for packaging the materialwith dilatancy to form a columnar cartridge shape. Under the (impacting) loading effect, the hole sealing material is converted into a solid state from a liquid state, is better in anti-impacting performance, good in sealing effect and beneficial for doing work through expansion by detonation gas of explosive, and improves the detonating efficiency. After explosive detonation, the hole sealing material is in a liquid state, the failure detonation treatment can be conveniently conducted under the drilling-and-blasting condition, and the hole sealing material can be conveniently recycled.

Description

technical field [0001] The invention relates to a hole sealing method, in particular to a hole sealing method suitable for general blasting drilling, and more suitable for (ultra) deep hole blasting hole sealing conditions based on bulge-plastic non-Newtonian fluid material. Background technique [0002] Blasting construction is widely used in various geotechnical and mining projects at home and abroad due to its advantages of safety, efficiency and low cost. In mine production, drilling and blasting have played a huge role in the fields of hard coal rock pre-cracking loosening, roof weakening, roof cutting and pressure relief, low-permeability and low-permeability coal rock cracking and permeability enhancement, and surrounding rock high stress transfer. In order to ensure the quality and effect of drilling and blasting, it is required to use materials such as yellow mud, yellow sand or cement rolls to seal the blast hole, and the length of the sealed hole is generally not ...

AI Technical Summary

Problems solved by technology

However, it will be very difficult to deal with the sealing material with a certain curing strength once the blasting is rejected in drilling and blasting

The safety regulations also prohibit the in-situ treatment of the solidified sealing material along the original drill hole, which brings great difficulties to the blasting rejection treatment of the blast hole; The method is very difficult to operate. Even if it is feasible, it is not easy to accurately drill long parallel holes next to the explosion-proof holes.

[0004] In short, if the traditional materials such as yellow mud and cement are used as the sealing material under the condition of drilling and blasting, it will be difficult to handle once the blasting hole is rejected.

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