Retarding cement slurry composite for replacement of super-deep freezing hole and preparation method thereof

Abstract

The invention discloses a retarding cement slurry composite for replacement of super-deep freezing hole and a preparation method thereof. The composite consists of silicate cement, retarder, a stabilizing agent and water; and retarding silicate cement slurry is prepared according to the mass ratio of 1:0.7-1:1.5 parts of water and cement, wherein the added retarding agent accounts for 0.1-0.3 parts of the cement; and the added stabilizing agent accounts for 0-10 parts of the cement. The retarding agent is JS-1 type retarding agent and consists of hydroxy carboxylic acid as well as salt thereof and inorganic salt, wherein the hydroxy carboxylic acid and salt thereof accounts for 50-70 parts and the inorganic salt counts for 30-50 parts. The preparation method comprises the following steps of: weighing water, and pouring the water into a stirring box; weighing the retarding reagent and stirring; weighing the bentonite and continuously stirring; and weighing the cement and continuously evenly stirring. The invention has the comprehensive advantages of long retarding time, good replaceability and high concretion intensity, and can be widely applied to industries, such as coal mine, petroleum and the like.

Description

technical field

[0001] The invention relates to a slow-setting cement slurry composition, in particular to a slow-setting cement slurry composition for replacing ultra-deep frozen holes. Background technique

[0002] The freezing method is to use artificial refrigeration to freeze the strata around the wellbore into a closed cylindrical frozen wall before the wellbore is excavated to resist ground pressure and isolate the connection between groundwater and the wellbore, and then excavate under the protection of the frozen wall. A special construction method for masonry work.

[0003] In recent years, with the development of deep coal and various ore bodies, the shaft depth has been increasing. In order to ensure the safe and smooth construction of the wellbore, the method of freezing the topsoil section and grouting the bedrock section is often used for construction. This method requires two sets of processes of freezing and grouting, with long construction period, high in...

Examples

Embodiment 1

[0024] A retarded cement slurry composition for ultra-deep frozen hole replacement, the composition is composed of Portland cement, retarded water reducer, stabilizer, water, the composition is composed of Portland cement, retarded water reducer , stabilizer, water composition, by mass ratio by water: cement=1 part: 0.7 part~1 part: 1.5 part is prepared into retarded portland cement slurry, wherein the added retarded water reducer should account for 0.1 of cement mass to 0.3 parts, the added stabilizer should account for 0 to 10 parts of the cement mass, and the stabilizer is bentonite.

[0025] The retarding superplasticizer is a JS-1 type retarder, and the JS-1 type retarder is composed of hydroxycarboxylic acid and its inorganic salts, and the hydroxycarboxylic acid is citric acid or tartaric acid One or two are added at the same time. The inorganic salts are one of sulfate and borate, or two are added at the same time. According to the mass ratio, hydroxycarboxylic acids a...

Embodiment 2

[0033] A retarded cement slurry composition for replacing ultra-deep frozen holes, prepared from water: cement = 1 part: 0.8 part to 1 part: 1.4 parts by mass ratio to prepare retarded portland cement slurry, wherein the added retarded The water agent should account for 0.2 to 0.25 parts of the cement mass, and the added stabilizer should account for 2 to 8 parts of the cement mass. The preparation method is the same as in Example 1.

Embodiment 3

[0035] A retarded cement slurry composition for replacement of ultra-deep frozen holes, prepared from water: cement = 1 part: 1.5 parts by mass ratio to prepare retarded Portland cement slurry, wherein the added retarded water reducer should account for the mass of cement 0.3 part, the stabilizing agent that adds should account for 10 parts of cement quality, and described stabilizing agent is bentonite, and preparation method is with embodiment 1.

technical field

[0001] The invention relates to a slow-setting cement slurry composition, in particular to a slow-setting cement slurry composition for replacing ultra-deep frozen holes. Background technique

[0002] The freezing method is to use artificial refrigeration to freeze the strata around the wellbore into a closed cylindrical frozen wall before the wellbore is excavated to resist ground pressure and isolate the connection between groundwater and the wellbore, and then excavate under the protection of the frozen wall. A special construction method for masonry work.

[0003] In recent years, with the development of deep coal and various ore bodies, the shaft depth has been increasing. In order to ensure the safe and smooth construction of the wellbore, the method of freezing the topsoil section and grouting the bedrock section is often used for construction. This method requires two sets of processes of freezing and grouting, with long construction period, high in...

Examples

Embodiment 1

[0024] A retarded cement slurry composition for ultra-deep frozen hole replacement, the composition is composed of Portland cement, retarded water reducer, stabilizer, water, the composition is composed of Portland cement, retarded water reducer , stabilizer, water composition, by mass ratio by water: cement=1 part: 0.7 part~1 part: 1.5 part is prepared into retarded portland cement slurry, wherein the added retarded water reducer should account for 0.1 of cement mass to 0.3 parts, the added stabilizer should account for 0 to 10 parts of the cement mass, and the stabilizer is bentonite.

[0025] The retarding superplasticizer is a JS-1 type retarder, and the JS-1 type retarder is composed of hydroxycarboxylic acid and its inorganic salts, and the hydroxycarboxylic acid is citric acid or tartaric acid One or two are added at the same time. The inorganic salts are one of sulfate and borate, or two are added at the same time. According to the mass ratio, hydroxycarboxylic acids a...

Embodiment 2

[0033] A retarded cement slurry composition for replacing ultra-deep frozen holes, prepared from water: cement = 1 part: 0.8 part to 1 part: 1.4 parts by mass ratio to prepare retarded portland cement slurry, wherein the added retarded The water agent should account for 0.2 to 0.25 parts of the cement mass, and the added stabilizer should account for 2 to 8 parts of the cement mass. The preparation method is the same as in Example 1.

Embodiment 3

[0035] A retarded cement slurry composition for replacement of ultra-deep frozen holes, prepared from water: cement = 1 part: 1.5 parts by mass ratio to prepare retarded Portland cement slurry, wherein the added retarded water reducer should account for the mass of cement 0.3 part, the stabilizing agent that adds should account for 10 parts of cement quality, and described stabilizing agent is bentonite, and preparation method is with embodiment 1.

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