Mine fracture grouting material and usage method thereof

A grouting material and fissure technology, which is applied in the field of rock mass fissure grouting engineering, can solve the problems of high water separation rate, low stone rate and high cost of slurry, and achieve the effects of low water separation rate, high stone rate and low viscosity.

Inactive Publication Date: 2012-10-31
NO 1 SURVEYING TEAM OF ANHUI CHARCOAL FIELD & GEOLOGY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clay accounts for 60-80% of the cement clay slurry. The slurry has the advantages of high dispersibility, high calculus rate, and low cost. However, when the clay is mixed in a large amount, the slurry has low strength and high viscosity, and is only suitable for filling injection The advantage of fly ash cement slurry is th...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The micro-fine high-performance composite micro-crack grouting material for mining includes the following raw materials in parts by weight:

[0026] Components: 5.0kg of superfine cement, 0.5kg of silica fume, 2.5kg of fly ash, 0.5kg of bentonite, and 0.05kg of water reducing agent. The particle size of ultra-fine cement is between a few tenths of a micron to tens of microns, and silica fume is a by-product of a power plant whose particles are finer than ultra-fine cement.

[0027] Process: Mix the above raw materials evenly, add water, mix according to the water-cement ratio of 1:1, and make a slurry after fully stirring.

[0028] Slurry properties: water separation rate 1.2%, viscosity 19.53S, initial setting time 7h14min, final setting time 8h55min, stone body 7d compressive strength 7.2MPa, 28d compressive strength 12.5MPa.

Embodiment 2

[0030] Components: 6.0kg of superfine cement, 1.0kg of silica fume, 3.0kg of fly ash, 0.4kg of bentonite, and 0.07kg of water reducing agent.

[0031] Process: Mix the above raw materials evenly, add water, mix according to the water-cement ratio of 1:1, and make a slurry after fully stirring.

[0032] Slurry properties: water separation rate 1.0%, viscosity 25.63S, initial setting time 6h18min, final setting time 8h25min, stone body 7d compressive strength 9.4MPa, 28d compressive strength 15.6MPa.

Embodiment 3

[0034] Components: 5.5kg of superfine cement, 1.0kg of silica fume, 2.5kg of fly ash, 1.0kg of bentonite, and 0.10kg of water reducing agent.

[0035] Process: Mix the above raw materials evenly, add water, mix according to the water-cement ratio of 1:0.8, and prepare the slurry after fully stirring.

[0036] Slurry properties: water separation rate 1.7%, viscosity 23.72S, initial setting time 6h48min, final setting time 9h15min, stone body 7d compressive strength 6.7MPa, 28d compressive strength 13.8MPa.

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Abstract

The invention discloses a mine fracture grouting material and a usage method thereof. The mine fracture grouting material comprises raw materials of, by weight, 5.5-6.0kg of superfine cement, 0.5-1.0kg of silica powders, 2.5-3.0kg of coal ashes, 0.3-0.5kg of bentonite and 0.05-0.12kg of water reducing agents. According to the mine fracture grouting material, the superfine cement is used as a host material and supplemented by other materials, and the main fracture grouting material has the advantages of being high in concretion rate, tiny in expansibility, low in bleeding rate and good in stability; when the water cement ratio is 1: 1, the 28-day compression strength of the mine fracture grouting material can reach 15MPa; the mine fracture grouting material can be well injected and permeated into fine fractures of rock masses; the problem of ground water environmental pollution caused by chemical grouts is absent, and engineering requirements of reinforcement and impervious effects are satisfied; and grouts manufactured by the mine fracture grouting material can be applicable to mine water management and micropore fractured rock mass reinforcing engineering of hydraulic and hydro-power engineering rock masses.

Description

technical field [0001] The invention belongs to the field of rock mass fissure grouting engineering, in particular to a mine fissure grouting material and its application method. Background technique [0002] Grouting water blocking is one of the important means to prevent and control water damage in coal mines. In the deep mining process of coal mines in northern my country, when faced with the threat of various limestone water hazards, two measures are currently being taken, one is drainage and pressure reduction. This method is limited by the protection of the water environment and the increase in the cost of coal per ton. The second is grouting reconstruction and reinforcement, that is, the grouting reinforcement reconstruction is carried out on the floor water-resisting layer threatened by the limestone water at the bottom to increase its anti-seepage strength and improve the strength of the floor. [0003] The deep coal seam floor has developed fissures and is subjecte...

Claims

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Application Information

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IPC IPC(8): C04B28/00
Inventor 余大有孙家应吴松贵吴军
Owner NO 1 SURVEYING TEAM OF ANHUI CHARCOAL FIELD & GEOLOGY BUREAU
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