Drilling hole sealing material

Abstract

A drilling sealing material belongs to sealing materials. The sealing material consists of water 30-40%, ordinary silicon cement 30-40%, sodium bicarbonate 1.4-2%, sodium carbonate 1.5-2%, citric acid 3.0-3.5%, calcium carbonate 8.0-8.5%, bentonite 8.0- 8.5%, 8.0-8.5% gypsum, and 0.10-0.18% polyacrylamide, which can be used after mixing the above substances according to the mass percentage. Sodium carbonate, sodium bicarbonate, and citric acid in this material will quickly react to generate gas in the solution, but in the sol of polyacrylamide and cement slurry, the molecules cannot contact in time, and the molecules permeate through the sol-coated structure to react It takes a certain amount of time; during this time the cement and gypsum also gradually crystallize with the water, and the material gradually thickens until it sets. Advantages: The sol is thin and easy to grout when the material is first formed; 5-7 hours after the slurry is injected into the drill hole, the slurry gradually thickens, the volume continues to expand, and the strength gradually increases, which can be closely bonded to the coal body , and plug the micro-cracks formed in the drilling process, the material is compact as a whole; the materials selected in the present invention are all common materials in the market, and the cost is low.

Description

technical field [0001] The invention relates to the sealing of gas pressure measuring boreholes, gas drainage boreholes and coal seam water injection boreholes in mining enterprises, in particular to a borehole sealing material. Background technique [0002] Now commonly used drilling sealing materials are polyurethane, high-water mine materials and expansive cement. [0003] Organic sealing materials generally use polyurethane sealing materials. Polyurethane sealing materials have a high expansion multiple, respond quickly when used, and are not easy to operate. They are easy to splash on the operator during actual construction, which is harmful to human health. The cost of polyurethane sealing materials is relatively high. High; Inorganic sealing materials generally use expansive cement and high-water materials. Expansive cement and high-water materials are harmless to the human body, but both have their own defects. One piece, but the volume will not expand after being i...

AI Technical Summary

Problems solved by technology

[0003] Organic sealing materials generally use polyurethane sealing materials. Polyurethane sealing materials have a high expansion multiple, respond quickly when used, and are not easy to operate. They are easy to splash on the operator during actual construction, which is harmful to human health. The cost of polyurethane sealing materials is relatively high. High; Inorganic sealing materials generally use expansive cement and high-water materials. Expansive cement and high-water materials are harmless to the human body, but both have their own defects. One piece, but the volume will not expand after being injected into the borehole, which is not conducive to plugging the micro-cracks formed during the drilling process; the expansion cement can expand in volume, and the operator has not had time to inject it into the hole because of its fast reaction speed during use. The volume expansion of grouting has ended, so micro-cracks cannot be sealed