Modified tailing slurry and pulping and grouting process thereof

Abstract

The invention discloses modified tailing slurry. The modified tailing slurry comprises the following components in parts by weight: 1.0-1.4 parts of water, 1.0 part of cement, 1.5-2.5 parts of tailing and 0.2-0.5 part of clay, wherein the tailing is graded tailing with the particle size in the range of 10-100 mu m; the particle size of the clay is in the range of 0.002-0.5mm, and the clay comprises the following components in percentage by mass: 20%-40% of clay particles, 50%-70% of powder particles and 0.5%-10% of sand particles; the cement is ordinary silicate bulk P.032.5 cement. The invention further discloses a pulping and grouting process of the modified tailing slurry. The pulping and grouting process is performed according to the following process steps: 1) preparing the modified tailing slurry disclosed by the invention; and 2) conveying and injecting the prepared modified tailing slurry into a grouting hole through a plunger pump.

Description

technical field [0001] The invention belongs to the field of mine water prevention and foundation reinforcement, in particular to a mine curtain grouting water blocking project; in particular, it relates to a modified tailing mortar applied to a grouting project and a grouting process thereof. Background technique [0002] Grouting engineering is widely used in mine water prevention and foundation reinforcement and other fields. With the further development and utilization of minerals in our country, there are more and more ore deposits that are difficult to mine due to flooding. It is an important measure to ensure the safe mining of ore bodies by grouting the whole or part of the ore deposits to prevent water. The grouting project for mine water prevention and control is to inject grout into the cavities and fissures of the aquifer through high pressure, so as to block the aqueduct, reduce the permeability of the aquifer, and improve the compressive strength. Therefore, t...

AI Technical Summary

Problems solved by technology

[0004] In practical engineering applications, the initial setting time of cement-tailing mortar is relatively long, generally more than 10 hours, and it is easy to segregate during the grouting process, reducing the injectability

Especially in underwater grouting, due to the segregation phenomenon of cement-tailing mortar, on the one hand, the cement is easy to lose with the water flow, resulting in the separation of cement and tailing sand into layered deposits, and it is difficult to fill the cavities and fissures to form an effective water blocking barrier. At the same time, it causes waste of grouting materials; on the other hand, it is difficult for the tailing mortar to enter the small cracks, and the diffusion range is insufficient, which affects the water blocking effect and leaves hidden dangers for the project.

Images