Construction method for intercepting curtain prevent and cure water by building L-shaped grouting

Abstract

The invention relates to the technical field of prevent and cure water of mines, in particular to a construction method for intercepting curtain prevent and cure water by building L-shaped grouting. The method comprises the following steps: firstly, arranging an L-shaped curtain around a mining excavating face; then drilling a injected hole in the curtain; grouting the injected hole after hole flushing and a pump-in test; during grouting, first, putting a bushing in the injected hole, then carrying out grouting by way of sectional grouting from top to bottom, carrying out continuous grouting for 20-30 min if the acceptance of grout of the injected hole at a regulated pressure is smaller than 10 L / min to finish the grouting work; then injecting concentrated cement tailing slurry into the hole bottom of the injected hole; carrying out lifting while grouting to fulfill and seal the injected hole; and in 14 days after grouting, carrying out quality inspection to finish construction. The construction method can exert an obvious intercepting role to weaken the dissolution action of underground water, so that large surface subsidence is hard to form and the geological environment in the mine areas such as roads, rivers and villages is protected, thereby laying a solid foundation for future safe production in the mining area.

Description

technical field [0001] The invention relates to the technical field of mine water prevention and control, in particular to a construction method for water prevention and control by constructing an L-shaped grouting interception curtain. Background technique [0002] Curtain grouting is a grouting technology that uses hydraulic pressure or air pressure to press the solidified slurry through a special grouting hole according to the designed concentration, and press it into the specified rock and soil layer to fill the cracks in the rock and soil mass. In order to improve the physical and mechanical properties of the grouting object and meet the needs of various projects, it can be divided into anti-seepage grouting and reinforcement grouting according to its different functions. For large mines with abundant groundwater, the implementation of grouting curtains around the mining field is a good way to prevent water hazards. [0003] my country's copper-lead-zinc mines are rich...

AI Technical Summary

Problems solved by technology

[0003] my country's copper-lead-zinc mines are rich in mineral resources, such as the copper-lead-zinc mine resources in Xinzhuang, Jiangxi, etc., but many of them are located near villages, farmland, roads, rivers and even villages are within the scope of mining influence, and most of these mining areas are hydrogeological Quasi-plain landforms with complex conditions and abundant water inflow from mine pits. If mining is carried out without effective water control measures, serious geological disasters such as mine water inrush and ground subsidence may occur, causing serious consequences.