Mine fracture grouting material and usage method thereof

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...

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 that it has good workability, but the disadvantage is that fly ash is prone to delamination in the slurry, and its strength is low; the advantage of pure cement slurry is that it has a higher strength. High, the disadvantage is that the water separation rate of the slurry is high, the stone formation rate is low, and the cost is high