Expanded polymer grouting material for high pressure and large flow karst water inrush treatment and preparation method
A grouting material and polymer technology, applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problems of low retention rate, poor water erosion resistance, long initial and final setting time, etc., to improve plugging performance, increase Water absorption, easy operation effect
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Embodiment 1
[0069] 1. A method for preparing an expanded polymer grouting material for high-pressure and large-flow karst inrush water treatment, comprising the following steps:
[0070] (1) Dilute the acrylic acid monomer with deionized water to obtain 80 g of acrylic acid solution with a concentration of 45%, then add 0.2 g of N,N-methylenebisacrylamide to the acrylic acid solution, stir with a magnetic stirrer for 10 minutes; then add 1.5g of polyvinyl alcohol was polymerized for 1.5h to obtain a precursor solution;
[0071] (2) Potassium persulfate: dimethyl azobisisobutyrate: potassium persulfate / ferrous chloride is 2:1:1 preparation according to mass ratio, obtains initiator, and this initiator of 0.108g is added step ( 1) In the obtained precursor solution, gradually increase the temperature from 4°C to 75°C (at a rate of 2°C / min), react for 15 minutes to obtain a hydrogel, and grind the hydrogel to obtain a primary polymer water-absorbent resin;
[0072] (3) Water: glycerol: ethy...
Embodiment 2
[0077] A method for preparing an expanded polymer grouting material for high-pressure and large-flow karst inrush water treatment, comprising the following steps:
[0078] (1) Dilute the acrylic acid monomer with deionized water to obtain 80 g of acrylic acid solution with a concentration of 30%, slowly add sodium hydroxide with a mass fraction of 20% in an ice-water bath to neutralize the acrylic acid aqueous solution, and obtain incomplete acrylic acid containing Neutralization solution, wherein the degree of neutralization is 45%; then add 0.252g pentaerythritol tetraester to the incomplete neutralization solution, stir with a magnetic stirrer for 8min; then add 1.8g polyvinyl alcohol to polymerize for 1.0h to obtain a precursor solution ;
[0079] (2) Hydrogen peroxide: azobisisoheptanonitrile: potassium persulfate / ferrous chloride is prepared according to the mass ratio of 1:2:7 to obtain an initiator, and 0.152g of this initiator is added to step (1) to obtain In the pr...
Embodiment 3
[0085] A method for preparing an expanded polymer grouting material for high-pressure and large-flow karst inrush water treatment, comprising the following steps:
[0086] (1) Dilute the acrylic acid monomer with deionized water to obtain 120 g of acrylic acid solution with a concentration of 30%, slowly add calcium hydroxide with a mass fraction of 30% in an ice-water bath to neutralize the acrylic acid aqueous solution, and obtain incomplete acrylic acid containing Neutralization solution, the degree of neutralization is 60%; then add 0.720g of pentaerythritol triallyl ether to the incomplete neutralization solution, stir with a magnetic stirrer for 11min; then add 3.6g of acrylamide to polymerize for 1.5h to obtain the precursor body solution;
[0087] (2) Potassium persulfate: dimethyl azobisisobutyrate potassium persulfate / ferrous chloride is 2:1:1 preparation according to mass ratio, obtains initiator, and this initiator of 0.165g is added step (1 ) in the precursor sol...
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