Method for precise grouting reconstruction of roof thin-layer limestone aquifer

Abstract

The invention belongs to the field of mine water prevention and control, and more specifically, the invention relates to a method for precise grouting reconstruction of a thin limestone aquifer on a roof. Compared with previous technologies such as roof reinforcement grouting, downhole reinforcement grouting, or roof aquifer dredging and mining using ground vertical holes, the technology of the present invention uses the uphole and downhole hydrological observation systems to accurately monitor the water in the thin limestone aquifer in the grouting area. Press the water level to analyze the diffusion radius and distance of the grout, adjust the grouting materials and parameters in time, realize the precise control of the grouting process, and achieve precise control of the grouting radius and grouting effect. Through the technical scheme of the invention, the effects of wide coverage and low cost of water prevention and control are realized, and the thin limestone aquifer on the roof of the mine is transformed into an aquifer without water or a weak aquifer by grouting, so as to realize the effect of water damage prevention and control of safe excavation and mining. This technology can also be applied to iron mines or non-metallic mines, which are threatened by water hazards of thin-layer limestone on the roof, to achieve safe and economical mining of resources.

Description

technical field [0001] The invention belongs to the field of mine water prevention and control, and more specifically, the invention relates to a method for precise grouting reconstruction of a thin limestone aquifer on a roof. Background technique [0002] In some mining areas of the North China type coalfield, relatively stable four-five ash thin-bedded limestone and Xujiazhuang thin-bedded limestone aquifer of the Benxi Group exist. and the Yellow River North Coalfield) may have a thinning zone, a structural fracture zone, and a water-conducting fissure zone, resulting in a close hydraulic relationship between the two, and they are actually a water-bearing body macroscopically. [0003] At present, the domestic floor limestone confined water treatment technology is more mature. The surface grouting station is used to pre-grout the floor limestone through the grouting pipeline and the grouting hole in the underground working face, and to fill the karst cracks and conduits ...

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the lack of accurate control of the thin limestone aquifer on the roof and the inability to accurately control the technology of grouting reconstruction, and provides a method for precise grouting reconstruction of the thin limestone aquifer on the roof

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