A kind of controllable grouting fluid for coal mining and tunnel engineering and preparation method thereof

A technology for tunnel engineering and coal mines, applied in the field of controllable grouting fluid for coal mining and tunnel engineering and its preparation, can solve the problems of poor fluidity, poor pumpability, polluted groundwater environment, unfavorable plugging of cracks, etc., and achieves later strength No shrinkage, high working efficiency, saving construction time and economic cost

Active Publication Date: 2020-06-05
CHINA RAILWAY 12TH BUREAU GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional cement slurry has a long setting time and good fluidity, but it is not conducive to sealing cracks, causing a large amount of slurry loss and polluting the groundwater environment; while cement-sodium silicate double liquid slurry has too fast setting time, poor fluidity and pumpability, and is not easy to enter Cracks, easy to block grouting holes and other problems

Method used

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  • A kind of controllable grouting fluid for coal mining and tunnel engineering and preparation method thereof
  • A kind of controllable grouting fluid for coal mining and tunnel engineering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: A controllable grouting fluid for coal mining and tunnel engineering, made of the following raw materials: 100kg of superfine sulfate cement, 0.5kg of nano silicon dioxide, 6kg of calcined gypsum, 6kg of alum stone powder, lithium carbonate 0.05kg, wood calcium 0.3kg and water 80kg.

[0022] The method for preparing the controllable grouting fluid for a kind of coal mining and tunnel engineering, the steps are as follows:

[0023] (1) Add water to superfine sulfate cement to make a slurry with a water-cement ratio of 0.8 for later use;

[0024] (2) Add nano-silica, calcined gypsum and alunite powder into the slurry in step (1) and stir until completely dissolved;

[0025] (3) Add lithium carbonate and wood calcium into the mixture in step (2) and stir until completely dissolved.

Embodiment 2

[0026] Embodiment 2: A controllable grouting fluid for coal mining and tunnel engineering, made of the following raw materials: 100kg of superfine sulfate cement, 3kg of redispersible latex powder, 0.4kg of high-efficiency water reducer FDN, nanometer two Silicon oxide 0.5kg, calcined gypsum 6kg, alum stone powder 6kg, lithium carbonate 0.05kg, wood calcium 0.3kg and water 80kg.

[0027] The method for preparing the controllable grouting fluid for a kind of coal mining and tunnel engineering, the steps are as follows:

[0028] (1) Add water to superfine sulfate cement to make a slurry with a water-cement ratio of 0.8 for later use;

[0029] (2) Add dispersible latex powder, high-efficiency water reducer FDN, nano-silica, calcined gypsum and alunite powder into the slurry in step (1) and stir until completely dissolved;

[0030] (3) Add lithium carbonate and wood calcium into the mixture in step (2) and stir until completely dissolved.

Embodiment 3

[0031] Embodiment 3: A controllable grouting fluid for coal mining and tunnel engineering, made of the following raw materials: 100kg of superfine sulfate cement, 3kg of redispersible latex powder, 0.4kg of high-efficiency water reducer FDN, nanometer two Silicon oxide 0.5kg, calcined gypsum 7kg, alum stone powder 7kg, lithium carbonate 0.05kg, wood calcium 0.3kg and water 80kg. The preparation method is the same as the preparation method described in Example 2.

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Abstract

The invention belongs to the technical field of tunnel and coal seam mining, and provides a controllable grouting liquid for coal mining and tunnel engineering and a preparation method thereof for solving the problems that the current grouting liquid is not easy to enter cracks and easy to block grouting holes and the like. The controllable grouting liquid is prepared by mixing ultrafine sulfate cement, redispersible emulsion powder, a high-efficiency water reducer FDN, nano-silica, calcined gypsum, alunite powder, lithium carbonate, wooden calcium and water according to in a certain ratio. The controllable grouting liquid has the advantages that raw materials are easy to obtain, the condensation rate of the grouting liquid is controllable, the workability is good, the pumping effect is good, the water repellency is low, the surface hardness is high, the later strength is stable and does not shrink, the production cost is low, the construction speed is high, the work efficiency is high, and the environment is protected. The grouting liquid can be effectively poured in micro-cracks, is capable of enlarging a grouting radius, and is of great significance for the rapid lining supportreinforcement of a tunnel and the pollution-free, safe and efficient mining of coal. With the adoption of the controllable grouting liquid, emergency rescue projects can be dealt with easily, the construction speed is high, the work efficiency is high and the construction time is saved.

Description

technical field [0001] The invention belongs to the technical field of tunnel and coal seam mining, and in particular relates to a controllable grouting fluid for coal mining and tunnel engineering and a preparation method thereof. Background technique [0002] In coal seam mining, it is often encountered that the coal seam is thick, soft and broken, and the mining height is high. Because the working face is affected by the mining stress when it passes through the structural zone, it is easy to cause roof fall accidents and affect the normal coal mining work of the working face. It reduces the coal output of the working face, and also increases the difficulty of safe production. Most mines mainly rely on injecting organic grouting materials such as Ruimi and Ma Lisan into the soft coal seam to avoid the impact of coal seam slabs on the safe mining of the working face. Trouble. While they can solve the problem, their craftsmanship and price have a negative impact on both cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00C04B28/00E21D11/10E21D11/38
CPCC04B28/00C04B2201/50E21D11/10E21D11/38C04B14/062C04B22/143C04B22/148C04B22/10C04B24/18C04B22/002C04B2103/0057C04B2103/302
Inventor 梁为民杨培仕孙立光万里明姚小平龚健胡继辉马重庆苗利军杨荣孙庆舒
Owner CHINA RAILWAY 12TH BUREAU GRP
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