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A sealing material, the technology of ordinary silicon cement, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of easy splashing to the operator, high use cost, difficult operation, etc., and achieves good sealing effect and low cost. , The effect of easy grouting
Inactive Publication Date: 2009-09-02
CHINA UNIV OF MINING & TECH
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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
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Embodiment 1
[0009] Example 1: 40% of water, 30% of ordinary silicon cement, 1.4% of sodium bicarbonate, 1.5% of sodium carbonate, 3.0% of citric acid, 8.0% of calcium carbonate, 8.0% of bentonite, 8.0% of gypsum, and 0.10% of polyacrylamide;
[0010] The above-mentioned substances can be used after being mixed according to mass percentage. All the constituent raw materials of the material are commercially available materials, and they only need to reach the purity of industrial application, and there is no special requirement for the cement strength.
[0011] Use material of the present invention and polyurethane and high-water material to carry out comparative test on the sealing for gas drainage borehole, test result is as follows:
[0012] The material of the present invention and the polyurethane sealing material of the prior art and the drilling concentration and the flow pressure difference sealed by the high water sealing material are compared, and the material of the present inven...
Embodiment 2
[0021] Example 2: 38% of water, 30% of ordinary silicon cement, 1.7% of sodium bicarbonate, 1.7% of sodium carbonate, 3.3% of citric acid, 8.4% of calcium carbonate, 8.4% of bentonite, 8.4% of gypsum, and 0.10% of polyacrylamide.
[0022] The above-mentioned substances can be used after being mixed according to mass percentage.
Embodiment 3
[0023] Example 3: 35% of water, 35% of ordinary silicon cement, 1.4% of sodium bicarbonate, 1.5% of sodium carbonate, 3.0% of citric acid, 8.0% of calcium carbonate, 8.0% of bentonite, 8.0% of gypsum, and 0.10% of polyacrylamide.
[0024] The above-mentioned substances can be used after being mixed according to mass percentage.
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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...
Claims
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Application Information
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