Water glass slurry for grouting on mine working surface

Abstract

The invention provides water glass slurry for grouting on a mine working surface, wherein, the slurry takes ethylene acetate as a curing agent and water glass as a main agent; and 100 parts of slurrycomprises the following components by volume ratio: 15-60 parts of the water glass 38 Be, 1-10 parts of the ethylene acetate and water. In the invention, the water-soluble ethylene acetate is taken asthe curing agent; and the obtained grouting material has the advantages of low viscosity, high permeability, adjustable gelling time, simple components, non-corrosiveness and the like. The water glass slurry can be applied to the fields such as anti-seepage for hydraulic engineering, water plugging for a mine and the like, and the slurry especially has good application prospect on water blockingwith grout for the working surface of an underground microfracture stratum and a porosity stratum.

Description

Technical field: [0001] The invention belongs to the chemical grouting material of water glass series, and can be used for plugging leakage and preventing seepage in hydraulic engineering, ground pre-grouting in mine construction, working face grouting and post-grouting in well wall and water blocking. In particular, a mine face grouting water glass slurry. Background technique: [0002] With the development of mineral resources, the depth of mine construction is getting deeper and deeper, and the probability of micro-fracture strata, porous stratum aquifer and other special strata during the well construction process is increasing, such as Pingdingshan sandstone, Liujiagou Formation sandstone and other micro-fractures Rock strata or porous strata have large water inflow and high water pressure, while granular slurry materials such as single-liquid cement slurry and clay cement slurry are difficult to achieve ideal water blocking effect. Chemical slurry with good permeabili...

AI Technical Summary

Problems solved by technology

[0003] Water glass series chemical grouting material has also been reported, and CN 101265059A, Li Zhiguo etc. have studied sulfuric acid as the water glass solution grouting material of curing agent, and the curing rate is difficult to control, and acidic slurry (slurry PH=5 in the report) is not suitable for ordinary The grouting equipment is corrosive, and the engineering application has limitations; CN 86107196A and CN 1032354A, the water glass grout researched by the Guangzhou Institute of Chemistry, have the disadvantages of being difficult to guarantee the stability due to the large amount of grout components and complex matching