Underground grouting and water-plugging process

Abstract

The invention relates to a new process for underground grouting and water-plugging. The underground grouting and water-plugging process can effectively ensure the diffusion radius and the diffusion range of serous fluid, and reduce the using amount of cement and the labor intensity of a worker by simultaneously grouting single and bi-liquid, and the underground grouting and water-plugging process comprises the following steps of: (1) drilling a grouting hole; (2) pressing water and washing the hole after water burst from the drilled hole; (3) manufacturing the serous fluid; (4) performing grouting and water-plugging operation; and (5) drilling the grouting hole, wherein collaborative injection of single-liquid cement grout and bi-liquid cement-water glass grout is adopted in the grouting and water-plugging operation in the step (4).

Description

technical field [0001] The invention relates to a new technique for downhole grouting and water plugging. Background technique [0002] As we all know, water inrush is a major hazard faced by underground mining mines. In addition to the prevention and control of groundwater by dredging the groundwater of the mine deposit, mines generally use pre-grouting to seal the structural fissure water in front of the roadway, especially in the roadway. This method is generally used in the process of project development to ensure mine safety, combined with figure 1 , the traditional grouting process is as follows: [0003] The first step: grouting hole drilling [0004] When it is predicted that there will be water in front of the construction roadway, the drilling rig is used to drill or drill the grouting hole, and at the same time, the orifice pipe for grouting is installed to prepare for the grouting and water blocking operation after water gushing. After the borehole is drilled ...

AI Technical Summary

Problems solved by technology

[0014] In the above process, the fourth step is to inject cement or cement-sodium silicate double liquid slurry, and use a single liquid cement pump (BW-250 type, with a large amount of slurry, which can reach 250 liters / min) for single liquid cement When pouring grout, when the water gushing structure exposed by drilling has good connectivity and a large space, single-liquid cement grout is used, and the grouting volume is large, sometimes reaching hundreds of tons, which leads to high labor intensity for workers and makes it difficult to achieve continuous Grouting (grouting requires continuous grouting until the design final pressure is reached), the quality of grouting is difficult to guarantee

[0015] When using a double-fluid grouting pump (2TGZ-60 / 120 type, the amount of slurry is small, the maximum is 60, generally 19-36 liters / minute) for cement-water glass slurry injection, underground salt water or brine, the Water glass acts as a quick-setting effect, which makes it difficult to ensure sufficient diffusion of the grout, which affects the quality of grouting

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