Patent · US Active

Segmented grouting method for ramp drivage in aquifer

US11773683B1 · kind B1 · utility

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5References
7Claims
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Key dates

Filing dateMar 22, 2023
Grant dateOct 3, 2023
Priority date
Expiry dateMar 22, 2043

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02A30/60
  • WIPO fieldCivil engineering
  • WIPO sectorOther fields

Abstract

A segmented grouting method for ramp drivage in an aquifer is provided. Concerning grouting reinforcement for a ramp in an aquifer, a grouting process is divided into four stages according to a pressure change, that is, micro-pressure filling, low-pressure diffusion, medium-pressure reinforcement, and high-pressure fracturing. In the micro-pressure filling, an initial pressure of a grouting orifice is 0, and a low-concentration single-component grout is used to fill an original fissure of the aquifer. In the low-pressure diffusion, a low-concentration bicomponent grout is used for grouting, the original fissure is expanded, and a grouting radius is increased. In the medium-pressure reinforcement, a high-concentration bicomponent grout is used for grouting, thereby reinforcing the aquifer. In the high-pressure fracturing, a high-concentration bicomponent grout is used to reinforce a new fractured fissure of the orifice caused by a high pressure and the original fissure, thereby forming a confining bed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.