An intelligent circulation increasing-relieving pressure dynamic grouting system and method

Abstract

The invention relates to an intelligent cyclic supercharging and pressure relief type dynamic grouting system and a method. Under the premise of not destroying the original strength of rock mass, thestatic pressure grouting is carried out first, and by measuring the change of the indication number of a flow meter and a pressure transmitter; when the indication number of the flow meter no longer changes and the indication number of the pressure transmitter increases, the system automatically adjusts a pressure regulating valve to increase the grouting pressure, a valve automatic controller controls a slurry outlet valve and a slurry discharging pipeline valve according to the design frequency to switch on, and the cyclic supercharging and pressure relief grouting is realized; the fracturefilling rate and the grouting effect are improved, and the grouting ending standard is more clear to prevent the incomplete or excessive grouting from destroying the rock mass and wasting the resource. A safety pipeline is added in the system to prevent the pipe explosion and extraordinary accident, and the arrangement of a pressure stabilizing barrel ensures the stability of the grouting pressurein grouting process; the intelligent switch of the grouting mode is realized, the grouting efficiency is improved, and the slurry diffusion radius is increased; the fracture filling rate and the grouting effect are improved, the labor capacity is reduced, and the application prospects are wide.

Description

technical field [0001] The invention relates to an intelligent cycle increasing-relieving pressure dynamic grouting system and method, which are suitable for the fields of mining engineering and geotechnical engineering support such as coal mine roadway support, metal mine roadway support and tunnel engineering support. Background technique [0002] In the fields of mining engineering and geotechnical engineering support, grouting is often used to block water and strengthen surrounding rocks. The principle of grouting is to inject cement slurry into the cracks of rock mass, and after the slurry solidifies, the discrete rocks will be cemented into one Overall structure, improve the properties of rock mass strength and so on. Therefore, the filling rate of grout in the rock mass is an important index for evaluating the grouting effect. [0003] The commonly used grouting method adopts the static grouting method, that is, the grouting pressure does not change during the whole ...

AI Technical Summary

Problems solved by technology

However, the defect of the present invention is that the pulsed grouting is realized by the mechanical switching of the reversing valve. During the grouting process, the cement slurry is prone to blockage in the reversing valve. During the pressure relief process, the slurry may not penetrate through the cracks and cause greater slurry blockage, which may lead to accidents such as pipe bursts and meter explosions.

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