Modified clay double-fluid grout and grout-making and grouting process thereof

Abstract

The invention relates to modified clay double-fluid grout. The modified clay double-fluid grout is formed by adding an adjuvant into modified clay grout and mixing, wherein the adjuvant is sodium silicate of which the baume degree is 39 degrees-42 degrees and the modified clay grout comprises the following components in parts by weight: 1 part of cement, 1 part of clay and 2 parts of water, wherein the addition of sodium silicate accounts for 10%-40% of volume of the modified clay grout; or 1 part of cement, 1 part of clay and 1.6 parts of water, wherein the addition of cement accounts for 10%-30% of volume of the modified clay grout. The invention also provides a grout-making and grouting process of the modified clay double-fluid grout.

Description

technical field [0001] The invention belongs to the field of water prevention and foundation reinforcement in mines, in particular to curtain grouting water blocking projects in mines; in particular, it relates to a modified clay double liquid slurry applied to grouting projects and a grouting and grouting process thereof. Background technique [0002] Mine ground curtain grouting project is a new technology for mine water prevention and control in my country. It has been successfully used in many mines in my country and effectively solved the problem of mine water damage. The curtain grouting project on the ground of the mine injects the grout into the water-conducting cracks of the aquifer through high pressure, so as to reduce the permeability of the aquifer and reduce the drainage of the mine pit. Therefore, the applicability of the grout material is an important guarantee for the implementation effect of the mine ground curtain grouting project. [0003] The currently ...

AI Technical Summary

Problems solved by technology

In the state of flowing water, the grout is easily diluted and dispersed by groundwater, and is lost with the water flow, resulting in a small amount of grout left in the water passage, making it difficult to form an effective water-blocking barrier in a short time, resulting in waste of grouting materials

Cement-tailing mortar generally uses mine beneficiation tailings, and the cost of slurry is relatively low. However, due to the relatively coarse particles of tailings, it is difficult to enter small cracks. Some tailings contain beneficiation agent residues, so engineering applications are also limited

Cement-fly ash slurry has a smaller range of materials than the previous two types of slurry, and its performance is between cement-clay slurry and cement-tailing mortar. The initial setting time is relatively long, and its adaptability under dynamic water conditions is relatively poor.

[0004] Chemical grout mainly adopts dual-system grouting process, but the material is expensive and has certain toxicity, so the application range is small

The cement-sodium silicate double slurry also adopts the dual-system grouting process. During the grouting process, the grout ratio can be adjusted according to the site conditions, the initial setting time of the grout can be controlled, and controlled grouting is currently the main method of dynamic water grouting. material; however, the cost of cement-sodium silicate double-fluid slurry is relatively high, and the slurry preparation is relatively sensitive. During the grouting process, it is easy to form a lump early in the local area and "bridge" in the hole, and the slurry cannot effectively enter the grouting section; After the grout enters the grouting section, it is easy to form a small-scale blockage at the crack opening, and the grout is difficult to spread and cannot reach the designed diffusion range, leaving a quality hazard for the curtain grouting project

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